Candu Energy Inc.

Canada

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        Patent 45
        Trademark 3
Jurisdiction
        Canada 20
        World 19
        United States 7
        Europe 2
Date
2024 December 1
2024 1
2023 4
2022 1
2021 2
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IPC Class
G21C 19/20 - Arrangements for introducing objects into the pressure vesselArrangements for handling objects within the pressure vesselArrangements for removing objects from the pressure vessel 8
G21C 17/00 - MonitoringTesting 7
G21C 17/017 - Inspection or maintenance of pipe-lines or tubes in nuclear installations 6
G21C 19/00 - Arrangements for treating, for handling, or for facilitating the handling of, fuel or other materials which are used within the reactor, e.g. within its pressure vessel 6
B08B 9/023 - Cleaning the external surfaces 3
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NICE Class
01 - Chemical and biological materials for industrial, scientific and agricultural use 3
09 - Scientific and electric apparatus and instruments 3
11 - Environmental control apparatus 3
37 - Construction and mining; installation and repair services 3
40 - Treatment of materials; recycling, air and water treatment, 3
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Status
Pending 20
Registered / In Force 28

1.

LASER ABLATION DECONTAMINATION SYSTEM AND METHOD OF USING SAME

      
Application Number CA2024050750
Publication Number 2024/254678
Status In Force
Filing Date 2024-06-04
Publication Date 2024-12-19
Owner CANDU ENERGY INC. (Canada)
Inventor
  • Petrovic, Miroljub
  • Teodorescu, Tiberiu
  • Kotey, Nathan
  • Campagna, Tim

Abstract

Systems and methods for decontaminating a surface comprising radioactive contamination are provided. The system comprises an ablation chamber which includes a body defining a receptacle for receiving a laser head and an opening for positioning over the surface. The receptacle and the laser head are configured to direct a laser to the surface and to ablate the radioactive contamination into ablation products. A support may position the body above the surface and define a gap between the body and the surface. A suction blower is in fluid communication with the ablation chamber and is configured to provide a vacuum within the ablation chamber to move the ablation products from the ablation chamber to a filtration system. The filtration system filters the particles from air as it moves from the ablation chamber to the outlet.

IPC Classes  ?

  • G21F 9/00 - Treating radioactively contaminated materialDecontamination arrangements therefor
  • B23K 26/16 - Removal of by-products, e.g. particles or vapours produced during treatment of a workpiece
  • B23K 26/36 - Removing material

2.

Monark

      
Application Number 018959887
Status Registered
Filing Date 2023-12-05
Registration Date 2024-08-12
Owner Candu Energy Inc. (Canada)
NICE Classes  ?
  • 01 - Chemical and biological materials for industrial, scientific and agricultural use
  • 09 - Scientific and electric apparatus and instruments
  • 11 - Environmental control apparatus
  • 35 - Advertising and business services
  • 37 - Construction and mining; installation and repair services
  • 40 - Treatment of materials; recycling, air and water treatment,
  • 42 - Scientific, technological and industrial services, research and design

Goods & Services

Moderating materials for nuclear reactors; heavy water; fuel for nuclear reactors. Safeguard systems, namely surveillance cameras, radiation sensors and detectors, seals (mechanical, fibre optic or electronic), and associated instrumentation to monitor the movement of nuclear material to detect the removal of nuclear material from designated storage locations. Nuclear reactors; installations for processing nuclear fuel and nuclear moderating material; parts and fittings for all of the aforesaid. Procurement services in the field of nuclear reactors. Construction maintenance and repair services in the field of nuclear reactors; consulting services in the field of nuclear reactor construction. Nuclear reactor decontamination services. Material testing services in the field of nuclear reactor design, research and development, and in-service inspection; nuclear reactor engineering project management services.

3.

MONARK

      
Application Number 018959920
Status Registered
Filing Date 2023-12-05
Registration Date 2024-08-10
Owner Candu Energy Inc. (Canada)
NICE Classes  ?
  • 01 - Chemical and biological materials for industrial, scientific and agricultural use
  • 09 - Scientific and electric apparatus and instruments
  • 11 - Environmental control apparatus
  • 35 - Advertising and business services
  • 37 - Construction and mining; installation and repair services
  • 40 - Treatment of materials; recycling, air and water treatment,
  • 42 - Scientific, technological and industrial services, research and design

Goods & Services

Moderating materials for nuclear reactors; heavy water; fuel for nuclear reactors. Safeguard systems, namely surveillance cameras, radiation sensors and detectors, seals (mechanical, fibre optic or electronic), and associated instrumentation to monitor the movement of nuclear material to detect the removal of nuclear material from designated storage locations. Nuclear reactors; installations for processing nuclear fuel and nuclear moderating material; parts and fittings for all of the aforesaid. Procurement services in the field of nuclear reactors. Construction maintenance and repair services in the field of nuclear reactors; consulting services in the field of nuclear reactor construction. Nuclear reactor decontamination services. Material testing services in the field of nuclear reactor design, research and development, and in-service inspection; nuclear reactor engineering project management services.

4.

MONARK

      
Application Number 229252100
Status Pending
Filing Date 2023-11-13
Owner Candu Energy Inc. (Canada)
NICE Classes  ?
  • 01 - Chemical and biological materials for industrial, scientific and agricultural use
  • 09 - Scientific and electric apparatus and instruments
  • 11 - Environmental control apparatus
  • 37 - Construction and mining; installation and repair services
  • 40 - Treatment of materials; recycling, air and water treatment,
  • 42 - Scientific, technological and industrial services, research and design
  • 45 - Legal and security services; personal services for individuals.

Goods & Services

(1) Moderating materials for nuclear reactors; heavy water; fuel for nuclear reactors (2) Safeguard systems, namely surveillance cameras, radiation sensors and detectors, seals (mechanical, fibre optic or electronic), and associated instrumentation to monitor the movement of nuclear material to detect the removal of nuclear material from designated storage locations (3) Nuclear reactors; installations for processing nuclear fuel and nuclear moderating material; parts and fittings for all of the aforesaid (1) Procurement, commissioning, operation and decommissioning services in the field of nuclear reactors (2) Construction maintenance and repair services in the field of nuclear reactors (3) Nuclear reactor decontamination services (4) Material testing services in the field of nuclear reactor design, research and development, and in-service inspection; nuclear reactor project management services; consulting services in the field of nuclear reactor construction

5.

Method and apparatus for filtering fluid in nuclear power generation

      
Application Number 18302121
Grant Number 11975275
Status In Force
Filing Date 2023-04-18
First Publication Date 2023-08-31
Grant Date 2024-05-07
Owner CANDU ENERGY INC. (Canada)
Inventor
  • Dam, Richard
  • Cussac, Francois
  • Xu, Jian
  • Wang, Wei Yan
  • Lam, Wing Fai

Abstract

A filtering apparatus for a fluid intake of a nuclear power generation facility comprise primary and secondary frames. The primary frame defines an enclosed volume having least one inlet opening, and at least one outlet opening in fluid communication with the fluid intake. A primary filter is supported on the primary frame and covers the inlet opening such that fluid passes into the enclosed volume through the primary filter. The secondary frame is located within the volume enclosed by the primary frame. A secondary filter is supported on the secondary frame and defines an enclosed flow passage in communication with the outlet opening, such that fluid passes into the at least one outlet opening through the secondary filter and the enclosed flow passage.

IPC Classes  ?

  • B01D 29/07 - Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups Filtering elements therefor with flat filtering elements supported with corrugated, folded or wound filtering sheets
  • B01D 29/56 - Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition in series connection
  • G21C 19/307 - Arrangements for introducing fluent material into the reactor coreArrangements for removing fluent material from the reactor core with continuous purification of circulating fluent material, e.g. by extraction of fission products specially adapted for liquids
  • G21D 1/02 - Arrangements of auxiliary equipment
  • G21D 1/04 - Pumping arrangements

6.

PORTABLE POLYMER TESTER AND TESTING METHOD

      
Application Number 17631724
Status Pending
Filing Date 2020-06-10
First Publication Date 2022-09-08
Owner CANDU ENERGY INC. (Canada)
Inventor
  • Sachdev, Narendra Singh
  • Deadman, Jason
  • Jamieson, Robert
  • Dritsas, Panayotis
  • Chudak, Mark Adam
  • Bravo, Cesar Antonio
  • Di Carlo, Kevin

Abstract

A portable testing device and method for measuring physical characteristics of a polymeric or elastomeric material is provided. The testing device includes an indenter probe; a drive system for controlling movement of said probe, said drive system comprising a motorized linear slide operatively associated with the probe to advance said probe from a first position to a second position to deform said polymeric or elastomeric material and to facilitate instant or fast retraction of said probe to a predetermined intermediate position between said first and second positions; and a force/displacement measurement system including a first sensor for measuring force at the tip of said probe during contact with said polymeric or elastomeric material and a second sensor for measuring displacement of the probe; and a controller configured to provide control to the force/displacement measurement system and the drive system.

IPC Classes  ?

  • G01N 3/42 - Investigating hardness or rebound hardness by performing impressions under a steady load by indentors, e.g. sphere, pyramid
  • G01N 3/54 - Performing tests at high or low temperatures

7.

PORTABLE POLYMER TESTER AND TESTING METHOD

      
Document Number 03149318
Status Pending
Filing Date 2020-06-10
Open to Public Date 2021-02-11
Owner CANDU ENERGY INC. (Canada)
Inventor
  • Sachdev, Narendra Singh
  • Deadman, Jason
  • Jamieson, Robert
  • Dritsas, Panayotic
  • Chudak, Mark Adam
  • Bravo, Cesar Antonio
  • Di Carlo, Kevin

Abstract

A portable testing device and method for measuring physical characteristics of a polymeric or elastomeric material is provided. The testing device includes an indenter probe; a drive system for controlling movement of said probe, said drive system comprising a motorized linear slide operatively associated with the probe to advance said probe from a first position to a second position to deform said polymeric or elastomeric material and to facilitate instant or fast retraction of said probe to a predetermined intermediate position between said first and second positions; and a force/displacement measurement system including a first sensor for measuring force at the tip of said probe during contact with said polymeric or elastomeric material and a second sensor for measuring displacement of the probe; and a controller configured to provide control to the force/displacement measurement system and the drive system.

IPC Classes  ?

  • G01N 3/42 - Investigating hardness or rebound hardness by performing impressions under a steady load by indentors, e.g. sphere, pyramid
  • G01N 3/54 - Performing tests at high or low temperatures

8.

PORTABLE POLYMER TESTER AND TESTING METHOD

      
Application Number CA2020050792
Publication Number 2021/022357
Status In Force
Filing Date 2020-06-10
Publication Date 2021-02-11
Owner CANDU ENERGY INC. (Canada)
Inventor
  • Sachdev, Narendra Singh
  • Deadman, Jason
  • Jamieson, Robert
  • Dritsas, Panayotis
  • Chudak, Mark Adam
  • Bravo, Cesar Antonio
  • Di Carlo, Kevin

Abstract

A portable testing device and method for measuring physical characteristics of a polymeric or elastomeric material is provided. The testing device includes an indenter probe; a drive system for controlling movement of said probe, said drive system comprising a motorized linear slide operatively associated with the probe to advance said probe from a first position to a second position to deform said polymeric or elastomeric material and to facilitate instant or fast retraction of said probe to a predetermined intermediate position between said first and second positions; and a force/displacement measurement system including a first sensor for measuring force at the tip of said probe during contact with said polymeric or elastomeric material and a second sensor for measuring displacement of the probe; and a controller configured to provide control to the force/displacement measurement system and the drive system.

IPC Classes  ?

  • G01N 3/42 - Investigating hardness or rebound hardness by performing impressions under a steady load by indentors, e.g. sphere, pyramid
  • G01N 3/54 - Performing tests at high or low temperatures

9.

Nuclear coolant pump seal and methods of sealing

      
Application Number 16971874
Grant Number 11913465
Status In Force
Filing Date 2019-02-21
First Publication Date 2020-12-17
Grant Date 2024-02-27
Owner CANDU ENERGY INC. (Canada)
Inventor Dam, Richard

Abstract

A seal assembly for a pump comprises a gland housing mounted to the pump casing. A staging flow pathway is defined within the gland housing with multiple seal chambers. A seal stage is positioned in each seal chamber, each having a static sealing element and a rotating sealing element, the sealing elements engaging one another to form a fluid-tight seal. A rotor assembly pumps coolant through the gland housing. Fluid passing through the staging flow pathway is accelerated by an acceleration surface of the rotor assembly. An inlet passage feeds coolant fluid into the staging flow pathway and past the acceleration surface.

IPC Classes  ?

  • F04D 29/12 - Shaft sealings using sealing-rings
  • F04D 3/00 - Axial-flow pumps
  • F04D 29/08 - Sealings
  • F16J 15/34 - Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member
  • G21C 15/04 - Arrangement or disposition of passages in which heat is transferred to the coolant, e.g. for coolant circulation through the supports of the fuel elements from fissile or breeder material
  • G21C 15/243 - Promoting flow of the coolant for liquids
  • F04D 29/16 - Sealings between pressure and suction sides

10.

Methods and apparatus for repairing a tubular structure

      
Application Number 16765736
Grant Number 11684991
Status In Force
Filing Date 2018-11-28
First Publication Date 2020-09-17
Grant Date 2023-06-27
Owner CANDU ENERGY INC. (Canada)
Inventor Niemeyer, Frederik Geert

Abstract

Apparatuses and methods for repairing a defect in a nuclear reactor are provided. The apparatus includes a body for insertion in a tubular structure, the body includes: an end effector having a weld torch operable to deposit weld material by forming molten weld droplets and depositing the weld droplets the tubular structure. A drive unit includes a brace for selectively anchoring against said tubular structure; at least one linear actuator for moving the apparatus relative to the brace; and a rotational actuator coupled to rotate the weld torch. The method includes inserting a repair apparatus into tubular structure of the nuclear reactor; moving the repair apparatus to a defect location; depositing a protective weld layer over the defect by sequentially depositing weld droplets atop a weld pool on the tubular structure, wherein the protective weld layer bonds to the tubular structure surrounding the defect.

IPC Classes  ?

  • B23K 9/173 - Arc welding or cutting making use of shielding gas and of consumable electrode
  • B23K 9/04 - Welding for other purposes than joining, e.g. built-up welding
  • B23K 103/04 - Steel alloys
  • B23K 101/06 - Tubes
  • B23K 9/12 - Automatic feeding or moving of electrodes or work for spot or seam welding or cutting
  • B23K 9/32 - Accessories
  • B23K 37/02 - Carriages for supporting the welding or cutting element

11.

System and method of cleaning a heat exchanger

      
Application Number 16464597
Grant Number 12011805
Status In Force
Filing Date 2017-11-24
First Publication Date 2020-05-21
Grant Date 2024-06-18
Owner CANDU ENERGY INC. (Canada)
Inventor
  • Wilson, Paul
  • Visser, Peter
  • Spivak, Brent

Abstract

Methods and systems for cleaning inner surfaces of tubes in a heat exchanger. Some systems include a cleaning device having a nozzle configured to inject cleaning fluid into first and second tubes to perform different first and second cleaning cycles on the tubes, respectively, a controller configured to determine delivery parameters for the cleaning cycles based on a characteristic of each tube, and to control the cleaning device to perform the cleaning cycles based on the delivery parameters. Some methods include determining, with a controller, a tube in the heat exchanger engaged with a nozzle of a cleaning device for injecting a cleaning fluid into the tube during a cleaning cycle, a characteristic of the tube, and a delivery parameter of the cleaning cycle for the tube based on the characteristic of the tube; and performing the cleaning cycle for the tube based on the delivery parameter.

IPC Classes  ?

  • B24C 3/32 - Abrasive blasting machines or devicesPlants designed for abrasive blasting of particular work, e.g. the internal surfaces of cylinder blocks
  • B08B 9/023 - Cleaning the external surfaces
  • B08B 9/032 - Cleaning the internal surfacesRemoval of blockages by the mechanical action of a moving fluid, e.g. by flushing
  • B24C 1/00 - Methods for use of abrasive blasting for producing particular effectsUse of auxiliary equipment in connection with such methods
  • B24C 7/00 - Equipment for feeding abrasive materialControlling the flowability, constitution, or other physical characteristics of abrasive blasts
  • F28G 1/16 - Non-rotary, e.g. reciprocated, appliances using jets of fluid for removing debris
  • F28G 9/00 - Cleaning by flushing or washing, e.g. with chemical solvents
  • F28G 15/00 - CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OF BOILERS Details
  • F28G 15/04 - Feeding or driving arrangements, e.g. power operation

12.

GAS-BASED REACTIVITY CONTROL SYSTEM

      
Document Number 03097438
Status Pending
Filing Date 2019-04-16
Open to Public Date 2019-10-24
Owner CANDU ENERGY INC. (Canada)
Inventor
  • Attieh, Ibrahim Khalil
  • Chen, Mei
  • Demers, Zachary Todd
  • Eckhardt, Adam
  • Karmanova, Anna
  • Macdonald, Martin Walter
  • Masrorr, Maliha
  • Millard, Julian William Francis
  • Qazi, Smeena
  • Soulard, Michael
  • Tume, Pamela Darlene
  • Tyo, Jonathan Andrew
  • Walker, Zane Harry

Abstract

A gas-based reactivity control system for a nuclear reactor. The system control reactivity of a nuclear reactor by injecting pressurized neutron absorbing gas into gas tubes that are positioned inside a reactor core. Injector tanks are filled with the neutron absorbing gas. Upon detection of a reactivity control trigger, the fluid communication channels between the injector tanks and the gas tubes are opened. The pressure differential between the injection tanks and the gas tubes causes the neutron absorbing gas to flow into the gas tubes, thereby introducing negative reactivity into the reactor core. The negative reactivity may be introduced into the core relatively quickly, compared to conventional systems. The gas may be left in the gas tube to keep the reactor shut down. The gas in the gas tubes may be vented in a controlled manner to control reactivity increase in the core when restarting the reactor.

IPC Classes  ?

  • G21C 7/22 - Control of nuclear reaction by application of neutron-absorbing material, i.e. material with absorption cross-section very much in excess of reflection cross-section by displacement of a fluid or fluent neutron-absorbing material
  • G21C 9/033 - Means for effecting very rapid reduction of the reactivity factor under fault conditions, e.g. reactor fuse by an absorbent fluid

13.

GAS-BASED REACTIVITY CONTROL SYSTEM

      
Application Number CA2019050467
Publication Number 2019/200468
Status In Force
Filing Date 2019-04-16
Publication Date 2019-10-24
Owner CANDU ENERGY INC. (Canada)
Inventor
  • Attieh, Ibrahim Khalil
  • Eckhardt, Adam
  • Tume, Pamela Darlene
  • Millard, Julian William Francis
  • Walker, Zane Harry
  • Demers, Zachary Todd
  • Chen, Mei
  • Karmanova, Anna
  • Tyo, Jonathan Andrew
  • Soulard, Michael
  • Macdonald, Martin Walter
  • Masrorr, Maliha
  • Qazi, Smeena

Abstract

A gas-based reactivity control system for a nuclear reactor. The system control reactivity of a nuclear reactor by injecting pressurized neutron absorbing gas into gas tubes that are positioned inside a reactor core. Injector tanks are filled with the neutron absorbing gas. Upon detection of a reactivity control trigger, the fluid communication channels between the injector tanks and the gas tubes are opened. The pressure differential between the injection tanks and the gas tubes causes the neutron absorbing gas to flow into the gas tubes, thereby introducing negative reactivity into the reactor core. The negative reactivity may be introduced into the core relatively quickly, compared to conventional systems. The gas may be left in the gas tube to keep the reactor shut down. The gas in the gas tubes may be vented in a controlled manner to control reactivity increase in the core when restarting the reactor.

IPC Classes  ?

  • G21C 7/22 - Control of nuclear reaction by application of neutron-absorbing material, i.e. material with absorption cross-section very much in excess of reflection cross-section by displacement of a fluid or fluent neutron-absorbing material
  • G21C 9/033 - Means for effecting very rapid reduction of the reactivity factor under fault conditions, e.g. reactor fuse by an absorbent fluid

14.

NUCLEAR COOLANT PUMP SEAL AND METHODS OF SEALING

      
Application Number CA2019050214
Publication Number 2019/161500
Status In Force
Filing Date 2019-02-21
Publication Date 2019-08-29
Owner CANDU ENERGY INC. (Canada)
Inventor Dam, Richard

Abstract

A seal assembly for a pump comprises a gland housing mounted to the pump casing. A staging flow pathway is defined within the gland housing with multiple seal chambers. A seal stage is positioned in each seal chamber, each having a static sealing element and a rotating sealing element, the sealing elements engaging one another to form a fluid-tight seal. A rotor assembly pumps coolant through the gland housing. Fluid passing through the staging flow pathway is accelerated by an acceleration surface of the rotor assembly. An inlet passage feeds coolant fluid into the staging flow pathway and past the acceleration surface.

IPC Classes  ?

15.

NUCLEAR COOLANT PUMP SEAL AND METHODS OF SEALING

      
Document Number 03091968
Status Pending
Filing Date 2019-02-21
Open to Public Date 2019-08-29
Owner CANDU ENERGY INC. (Canada)
Inventor Dam, Richard

Abstract

A seal assembly for a pump comprises a gland housing mounted to the pump casing. A staging flow pathway is defined within the gland housing with multiple seal chambers. A seal stage is positioned in each seal chamber, each having a static sealing element and a rotating sealing element, the sealing elements engaging one another to form a fluid-tight seal. A rotor assembly pumps coolant through the gland housing. Fluid passing through the staging flow pathway is accelerated by an acceleration surface of the rotor assembly. An inlet passage feeds coolant fluid into the staging flow pathway and past the acceleration surface.

IPC Classes  ?

16.

METHODS AND APPARATUS FOR REPAIRING A TUBULAR STRUCTURE

      
Document Number 03083747
Status Pending
Filing Date 2018-11-28
Open to Public Date 2019-06-06
Owner CANDU ENERGY INC. (Canada)
Inventor Niemeyer, Frederik Geert

Abstract

Apparatuses and methods for repairing a defect in a nuclear reactor are provided. The apparatus includes a body for insertion in a tubular structure, the body includes: an end effector having a weld torch operable to deposit weld material by forming molten weld droplets and depositing the weld droplets the tubular structure. A drive unit includes a brace for selectively anchoring against said tubular structure; at least one linear actuator for moving the apparatus relative to the brace; and a rotational actuator coupled to rotate the weld torch. The method includes inserting a repair apparatus into tubular structure of the nuclear reactor; moving the repair apparatus to a defect location; depositing a protective weld layer over the defect by sequentially depositing weld droplets atop a weld pool on the tubular structure, wherein the protective weld layer bonds to the tubular structure surrounding the defect.

IPC Classes  ?

  • B23K 9/04 - Welding for other purposes than joining, e.g. built-up welding
  • B23K 9/12 - Automatic feeding or moving of electrodes or work for spot or seam welding or cutting
  • B23K 37/02 - Carriages for supporting the welding or cutting element
  • B23P 6/04 - Repairing fractures or cracked metal parts or products, e.g. castings
  • F16L 55/18 - Appliances for use in repairing pipes
  • F16L 55/28 - Constructional aspects
  • G21C 17/017 - Inspection or maintenance of pipe-lines or tubes in nuclear installations

17.

METHODS AND APPARATUS FOR REPAIRING A TUBULAR STRUCTURE

      
Application Number CA2018051513
Publication Number 2019/104427
Status In Force
Filing Date 2018-11-28
Publication Date 2019-06-06
Owner CANDU ENERGY INC. (Canada)
Inventor Niemeyer, Frederik Geert

Abstract

Apparatuses and methods for repairing a defect in a nuclear reactor are provided. The apparatus includes a body for insertion in a tubular structure, the body includes: an end effector having a weld torch operable to deposit weld material by forming molten weld droplets and depositing the weld droplets the tubular structure. A drive unit includes a brace for selectively anchoring against said tubular structure; at least one linear actuator for moving the apparatus relative to the brace; and a rotational actuator coupled to rotate the weld torch. The method includes inserting a repair apparatus into tubular structure of the nuclear reactor; moving the repair apparatus to a defect location; depositing a protective weld layer over the defect by sequentially depositing weld droplets atop a weld pool on the tubular structure, wherein the protective weld layer bonds to the tubular structure surrounding the defect.

IPC Classes  ?

  • B23K 9/04 - Welding for other purposes than joining, e.g. built-up welding
  • B23K 37/02 - Carriages for supporting the welding or cutting element
  • B23K 9/12 - Automatic feeding or moving of electrodes or work for spot or seam welding or cutting
  • B23P 6/04 - Repairing fractures or cracked metal parts or products, e.g. castings
  • F16L 55/18 - Appliances for use in repairing pipes
  • F16L 55/28 - Constructional aspects
  • G21C 17/017 - Inspection or maintenance of pipe-lines or tubes in nuclear installations

18.

METHOD AND APPARATUS FOR FILTERING FLUID IN NUCLEAR POWER GENERATION

      
Document Number 03078556
Status Pending
Filing Date 2018-10-05
Open to Public Date 2019-04-11
Owner CANDU ENERGY INC. (Canada)
Inventor
  • Dam, Richard
  • Cussac, Francois
  • Xu, Jian
  • Wang, Wei Yan
  • Lam, Wing Fai

Abstract

A filtering apparatus for a fluid intake of a nuclear power generation facility comprise primary and secondary frames. The primary frame defines an enclosed volume having least one inlet opening, and at least one outlet opening in fluid communication with the fluid intake. A primary filter is supported on the primary frame and covers the inlet opening such that fluid passes into the enclosed volume through the primary filter. The secondary frame is located within the volume enclosed by the primary frame. A secondary filter is supported on the secondary frame and defines an enclosed flow passage in communication with the outlet opening, such that fluid passes into the at least one outlet opening through the secondary filter and the enclosed flow passage.

IPC Classes  ?

  • G21C 15/00 - Cooling arrangements within the pressure vessel containing the coreSelection of specific coolants
  • G21D 1/02 - Arrangements of auxiliary equipment

19.

METHOD AND APPARATUS FOR FILTERING FLUID IN NUCLEAR POWER GENERATION

      
Application Number CA2018051259
Publication Number 2019/068199
Status In Force
Filing Date 2018-10-05
Publication Date 2019-04-11
Owner CANDU ENERGY INC. (Canada)
Inventor
  • Dam, Richard
  • Cussac, François
  • Xu, Jian
  • Wang, Wei Yan
  • Lam, Wing Fai

Abstract

A filtering apparatus for a fluid intake of a nuclear power generation facility comprise primary and secondary frames. The primary frame defines an enclosed volume having least one inlet opening, and at least one outlet opening in fluid communication with the fluid intake. A primary filter is supported on the primary frame and covers the inlet opening such that fluid passes into the enclosed volume through the primary filter. The secondary frame is located within the volume enclosed by the primary frame. A secondary filter is supported on the secondary frame and defines an enclosed flow passage in communication with the outlet opening, such that fluid passes into the at least one outlet opening through the secondary filter and the enclosed flow passage.

IPC Classes  ?

  • G21C 15/00 - Cooling arrangements within the pressure vessel containing the coreSelection of specific coolants
  • G21D 1/02 - Arrangements of auxiliary equipment

20.

METHOD AND APPARATUS FOR DETECTION AND POSITIONING OF OBJECTS BY VIBRATION

      
Document Number 03070234
Status Pending
Filing Date 2018-07-18
Open to Public Date 2019-01-24
Owner CANDU ENERGY INC. (Canada)
Inventor
  • Szczepan, Andrew
  • Vidican, Razvan

Abstract

Detecting and/or positioning annulus spacers, to maintain the annular space between a pressure tube within a calandria tube of a nuclear reactor, includes vibrating the tube with a transducer to induce motion of the annulus spacer, measuring vibration of the tube for a first response and a second response, computing a first frequency-domain response function for the first response and a second frequency-domain response function for the second response, and measuring a relative phase and amplitude shift between the first and second frequency-domain response functions to determine movement of the annulus spacer.

IPC Classes  ?

  • G01B 17/00 - Measuring arrangements characterised by the use of infrasonic, sonic, or ultrasonic vibrations
  • G21C 17/017 - Inspection or maintenance of pipe-lines or tubes in nuclear installations

21.

METHOD AND APPARATUS FOR DETECTION AND POSITIONING OF OBJECTS BY VIBRATION

      
Application Number CA2018050873
Publication Number 2019/014766
Status In Force
Filing Date 2018-07-18
Publication Date 2019-01-24
Owner CANDU ENERGY INC. (Canada)
Inventor
  • Vidican, Razvan
  • Szczepan, Andrew

Abstract

Detecting and/or positioning annulus spacers, to maintain the annular space between a pressure tube within a calandria tube of a nuclear reactor, includes vibrating the tube with a transducer to induce motion of the annulus spacer, measuring vibration of the tube for a first response and a second response, computing a first frequency-domain response function for the first response and a second frequency-domain response function for the second response, and measuring a relative phase and amplitude shift between the first and second frequency-domain response functions to determine movement of the annulus spacer.

IPC Classes  ?

  • G01B 17/00 - Measuring arrangements characterised by the use of infrasonic, sonic, or ultrasonic vibrations
  • G21C 17/017 - Inspection or maintenance of pipe-lines or tubes in nuclear installations

22.

COMMUNICATIONS SYSTEMS AND METHODS FOR NUCLEAR REACTOR TOOLING

      
Document Number 03066049
Status Pending
Filing Date 2018-06-22
Open to Public Date 2018-12-27
Owner CANDU ENERGY INC. (Canada)
Inventor
  • Szczepan, Andrzej Piotr
  • Jamieson, Robert William
  • Drossis, John
  • Bravo, Cesar Antonio

Abstract

Systems and methods for transmitting communications to and from tooling for a nuclear reactor are provided. Some systems include first and second tools including first and second tool controllers positioned on a platform located adjacent a face of the nuclear reactor, and a tooling controller communicatively coupled to the first and second tool controllers, wherein the tooling controller is configured to receive a communication from the second tool controller, wherein the communication includes an identifier of an operating state of the second tool, generate a control signal for controlling the first tool based at least in part on the identifier of the operating state of the second tool, and transmit the control signal to the first tool controller. Some systems include a display, memory and a processor configured to render a reactor equipment representation comprising status indicators, receive status messages, and update status indicators based upon the status messages.

IPC Classes  ?

  • G21C 19/00 - Arrangements for treating, for handling, or for facilitating the handling of, fuel or other materials which are used within the reactor, e.g. within its pressure vessel
  • G21C 17/00 - MonitoringTesting
  • G21C 19/20 - Arrangements for introducing objects into the pressure vesselArrangements for handling objects within the pressure vesselArrangements for removing objects from the pressure vessel
  • G21D 3/00 - Control of nuclear power plant

23.

INSPECTION TOOL AND METHOD FOR NUCLEAR REACTOR FUEL CHANNEL ASSEMBLY

      
Document Number 03066101
Status Pending
Filing Date 2018-06-20
Open to Public Date 2018-12-27
Owner CANDU ENERGY INC. (Canada)
Inventor
  • Drossis, John
  • Di Carlo, Kevin
  • Jamieson, Robert William
  • Rowe, Ron
  • Deadman, Jason

Abstract

Systems and methods for inspecting an interior surface of an element within a nuclear reactor. One system includes an inspection tool including a camera, a tool control system communicating with the inspection tool to control a rotational position of the inspection, and a workstation. The workstation is configured to receive image data captured with the camera at each of a plurality of rotational positions of the inspection tool and generate a panoramic image based on the image data. The workstation is also configured to automatically detect at least one defect within the panoramic image, and generate and output an inspection report, the inspection report including the panoramic image and data regarding the at least one defect.

IPC Classes  ?

  • G21C 17/00 - MonitoringTesting
  • G21C 17/017 - Inspection or maintenance of pipe-lines or tubes in nuclear installations

24.

COMMUNICATIONS SYSTEMS AND METHODS FOR NUCLEAR REACTOR TOOLING

      
Document Number 03213882
Status Pending
Filing Date 2018-06-22
Open to Public Date 2018-12-27
Owner CANDU ENERGY INC. (Canada)
Inventor
  • Szczepan, Andrzej Piotr
  • Jamieson, Robert William
  • Drossis, John
  • Bravo, Cesar Antonio

Abstract

Systems and methods for transmitting communications to and from tooling for a nuclear reactor are provided. Some systems include first and second tools including first and second tool controllers positioned on a platform located adjacent a face of the nuclear reactor, and a tooling controller communicatively coupled to the first and second tool controllers, wherein the tooling controller is configured to receive a communication from the second tool controller, wherein the communication includes an identifier of an operating state of the second tool, generate a control signal for controlling the first tool based at least in part on the identifier of the operating state of the second tool, and transmit the control signal to the first tool controller. Some systems include a display, memory and a processor configured to render a reactor equipment representation comprising status indicators, receive status messages, and update status indicators based upon the status messages.

25.

SYSTEM AND METHOD FOR VOLUME REDUCTION OF NUCLEAR REACTOR COMPONENTS

      
Application Number CA2018050671
Publication Number 2018/232497
Status In Force
Filing Date 2018-06-05
Publication Date 2018-12-27
Owner CANDU ENERGY INC. (Canada)
Inventor Deadman, Jason

Abstract

A volume reduction system for nuclear reactor components includes a feed unit to receive a radioactive tube from a nuclear reactor. The system also includes a segmenting unit to receive the tube from the feed unit. The segmenting unit includes a cutting element that segments the tube into segmented pieces. The system also includes a shredder unit to receive segmented pieces of the tube and shred the segmented pieces.

IPC Classes  ?

  • G21C 19/00 - Arrangements for treating, for handling, or for facilitating the handling of, fuel or other materials which are used within the reactor, e.g. within its pressure vessel
  • G21F 5/005 - Containers for solid radioactive wastes, e.g. for ultimate disposal

26.

INSPECTION TOOL AND METHOD FOR NUCLEAR REACTOR FUEL CHANNEL ASSEMBLY

      
Application Number CA2018050751
Publication Number 2018/232508
Status In Force
Filing Date 2018-06-20
Publication Date 2018-12-27
Owner CANDU ENERGY INC. (Canada)
Inventor
  • Drossis, John
  • Di Carlo, Kevin
  • Jamieson, Robert William
  • Rowe, Ron
  • Deadman, Jason

Abstract

Systems and methods for inspecting an interior surface of an element within a nuclear reactor. One system includes an inspection tool including a camera, a tool control system communicating with the inspection tool to control a rotational position of the inspection, and a workstation. The workstation is configured to receive image data captured with the camera at each of a plurality of rotational positions of the inspection tool and generate a panoramic image based on the image data. The workstation is also configured to automatically detect at least one defect within the panoramic image, and generate and output an inspection report, the inspection report including the panoramic image and data regarding the at least one defect.

IPC Classes  ?

  • G21C 17/00 - MonitoringTesting
  • G21C 17/017 - Inspection or maintenance of pipe-lines or tubes in nuclear installations

27.

CALANDRIA TUBE INSERT RELEASE AND REMOVAL TOOL AND METHOD

      
Application Number CA2018050770
Publication Number 2018/232526
Status In Force
Filing Date 2018-06-22
Publication Date 2018-12-27
Owner CANDU ENERGY INC. (Canada)
Inventor
  • Richard, Craig
  • Szczepan, Andrzej Piotr
  • Jamieson, Robert William
  • Patterson, Chuck
  • Deadman, Jason
  • Solti, George
  • Jacobs, Chris

Abstract

A device for removing a rolled joint insert from between a calandria tube of a fuel channel assembly of a nuclear reactor and a tube sheet of the nuclear reactor, the rolled joint insert radially securing the calandria tube to the tube sheet. The device includes a body extending axially from a first end to a second end, opposite the first end; a heater for heating a rolled joint insert to a first temperature; a cooler for cooling the rolled joint insert to a second temperature; a ledge for axially engaging the rolled joint insert; and a gripper for gripping the calandria tube. The heater, the cooler, the ledge and the gripper are in axial alignment along the body of the device.

IPC Classes  ?

  • G21C 19/20 - Arrangements for introducing objects into the pressure vesselArrangements for handling objects within the pressure vesselArrangements for removing objects from the pressure vessel

28.

SYSTEM AND METHOD FOR ALIGNING NUCLEAR REACTOR TUBES AND END FITTINGS USING TUBE ROTATION

      
Application Number CA2018050775
Publication Number 2018/232530
Status In Force
Filing Date 2018-06-22
Publication Date 2018-12-27
Owner CANDU ENERGY INC. (Canada)
Inventor
  • Stranart, Jean-Claude
  • Ziaei, Reza

Abstract

A method for orienting a pressure tube of a nuclear reactor relative to a calandria tube of the nuclear reactor. The method includes the steps of rotating the pressure tube with respect to the calandria tube to orient a bow of the pressure tube with respect to a bow of the calandria tube; inserting the pressure tube into the calandria tube; rotating the pressure tube with respect to the calandria tube to orient the bow of the pressure tube with respect to the bow of the calandria tube; and securing the pressure tube in the operational position.

IPC Classes  ?

  • G21C 19/20 - Arrangements for introducing objects into the pressure vesselArrangements for handling objects within the pressure vesselArrangements for removing objects from the pressure vessel

29.

SYSTEM AND METHOD FOR ALIGNING NUCLEAR REACTOR TUBES AND END FITTINGS USING TUBE GEOMETRY

      
Application Number CA2018050776
Publication Number 2018/232531
Status In Force
Filing Date 2018-06-22
Publication Date 2018-12-27
Owner CANDU ENERGY INC. (Canada)
Inventor Ziaei, Reza

Abstract

A method for positioning a calandria tube within a calandria vessel of a nuclear reactor. The method includes determining a restrained bow of the calandria tube; determining an unrestrained bow of the calandria tube; calculating a vector sum of the restrained bow of the calandria tube and the restrained bow of the calandria bow; and positioning the calandria tube with respect to the nuclear reactor to orient the vector sum in an operational position.

IPC Classes  ?

  • G21C 19/00 - Arrangements for treating, for handling, or for facilitating the handling of, fuel or other materials which are used within the reactor, e.g. within its pressure vessel

30.

SYSTEM AND METHOD FOR ALIGNING NUCLEAR REACTOR TUBES AND END FITTINGS USING TUBE GEOMETRY

      
Document Number 03066042
Status Pending
Filing Date 2018-06-22
Open to Public Date 2018-12-27
Owner CANDU ENERGY INC. (Canada)
Inventor Ziaei, Reza

Abstract

A method for positioning a calandria tube within a calandria vessel of a nuclear reactor. The method includes determining a restrained bow of the calandria tube; determining an unrestrained bow of the calandria tube; calculating a vector sum of the restrained bow of the calandria tube and the restrained bow of the calandria bow; and positioning the calandria tube with respect to the nuclear reactor to orient the vector sum in an operational position.

IPC Classes  ?

  • G21C 19/00 - Arrangements for treating, for handling, or for facilitating the handling of, fuel or other materials which are used within the reactor, e.g. within its pressure vessel

31.

CALANDRIA TUBE INSERT RELEASE AND REMOVAL TOOL AND METHOD

      
Document Number 03066098
Status Pending
Filing Date 2018-06-22
Open to Public Date 2018-12-27
Owner CANDU ENERGY INC. (Canada)
Inventor
  • Richard, Craig
  • Szczepan, Andrzej Piotr
  • Jamieson, Robert William
  • Patterson, Chuck
  • Deadman, Jason
  • Solti, George
  • Jacobs, Chris

Abstract

A device for removing a rolled joint insert from between a calandria tube of a fuel channel assembly of a nuclear reactor and a tube sheet of the nuclear reactor, the rolled joint insert radially securing the calandria tube to the tube sheet. The device includes a body extending axially from a first end to a second end, opposite the first end; a heater for heating a rolled joint insert to a first temperature; a cooler for cooling the rolled joint insert to a second temperature; a ledge for axially engaging the rolled joint insert; and a gripper for gripping the calandria tube. The heater, the cooler, the ledge and the gripper are in axial alignment along the body of the device.

IPC Classes  ?

  • G21C 19/20 - Arrangements for introducing objects into the pressure vesselArrangements for handling objects within the pressure vesselArrangements for removing objects from the pressure vessel

32.

SYSTEM AND METHOD FOR ALIGNING NUCLEAR REACTOR TUBES AND END FITTINGS USING TUBE ROTATION

      
Document Number 03066103
Status Pending
Filing Date 2018-06-22
Open to Public Date 2018-12-27
Owner CANDU ENERGY INC. (Canada)
Inventor
  • Stranart, Jean-Claude
  • Ziaei, Reza

Abstract

A method for orienting a pressure tube of a nuclear reactor relative to a calandria tube of the nuclear reactor. The method includes the steps of rotating the pressure tube with respect to the calandria tube to orient a bow of the pressure tube with respect to a bow of the calandria tube; inserting the pressure tube into the calandria tube; rotating the pressure tube with respect to the calandria tube to orient the bow of the pressure tube with respect to the bow of the calandria tube; and securing the pressure tube in the operational position.

IPC Classes  ?

  • G21C 19/20 - Arrangements for introducing objects into the pressure vesselArrangements for handling objects within the pressure vesselArrangements for removing objects from the pressure vessel

33.

PRESSURE TUBE-TO-END FITTING COUPLING AND METHOD OF ASSEMBLING NUCLEAR REACTOR FUEL CHANNEL ASSEMBLY

      
Document Number 03066139
Status Pending
Filing Date 2018-06-22
Open to Public Date 2018-12-27
Owner CANDU ENERGY INC. (Canada)
Inventor
  • Szczepan, Andrzej Piotr
  • Drossis, John

Abstract

A nuclear reactor core comprises a calandria having a shell and a tube sheet defining an aperture, a calandria tube coupled to the tube sheet and extending into the shell, a lattice tube coupled to the tube sheet and extending away from the shell, an end fitting body positioned at least partially in the lattice tube, a pressure tube positioned at least partially in the calandria tube and have an end secured to the end fitting body; and an end fitting liner positioned at least partially in the end fitting body coaxial with the pressure tube. An end of the end fitting liner adjacent the pressure tube includes a first inner surface having a roller clearance counter bore. The counter bore provides clearance to avoid contact between a rolling tool and the end fitting assembly.

IPC Classes  ?

  • G21C 1/08 - Heterogeneous reactors, i.e. in which fuel and moderator are separated moderator being highly pressurised, e.g. boiling-water reactor, integral-superheat reactor, pressurised-water reactor

34.

SYSTEM AND METHOD FOR VOLUME REDUCTION OF NUCLEAR REACTOR COMPONENTS

      
Document Number 03066142
Status Pending
Filing Date 2018-06-05
Open to Public Date 2018-12-27
Owner CANDU ENERGY INC. (Canada)
Inventor Deadman, Jason

Abstract

A volume reduction system for nuclear reactor components includes a feed unit to receive a radioactive tube from a nuclear reactor. The system also includes a segmenting unit to receive the tube from the feed unit. The segmenting unit includes a cutting element that segments the tube into segmented pieces. The system also includes a shredder unit to receive segmented pieces of the tube and shred the segmented pieces.

IPC Classes  ?

  • G21C 19/00 - Arrangements for treating, for handling, or for facilitating the handling of, fuel or other materials which are used within the reactor, e.g. within its pressure vessel
  • G21F 5/005 - Containers for solid radioactive wastes, e.g. for ultimate disposal

35.

APPARATUS AND METHOD FOR LOCATING A CALANDRIA TUBE

      
Document Number 03066145
Status Pending
Filing Date 2018-06-05
Open to Public Date 2018-12-27
Owner CANDU ENERGY INC. (Canada)
Inventor
  • Szczepan, Andrzej
  • Jamieson, Robert William

Abstract

A method of inserting a calandria tube in a reactor includes engaging an insertion tool with an inner surface of the calandria tube, inserting a portion of the calandria tube through a first calandria tube sheet bore via the insertion tool, inserting a guide tool into the inner surface of the calandria tube and guiding a portion of the calandria tube through a second calandria tube sheet bore via the insertion tool and the guide tool.

IPC Classes  ?

  • G21C 19/20 - Arrangements for introducing objects into the pressure vesselArrangements for handling objects within the pressure vesselArrangements for removing objects from the pressure vessel

36.

APPARATUS AND METHOD FOR LOCATING A CALANDRIA TUBE

      
Application Number CA2018050673
Publication Number 2018/232498
Status In Force
Filing Date 2018-06-05
Publication Date 2018-12-27
Owner CANDU ENERGY INC. (Canada)
Inventor
  • Szczepan, Andrzej
  • Jamieson, Robert

Abstract

A method of inserting a calandria tube in a reactor includes engaging an insertion tool with an inner surface of the calandria tube, inserting a portion of the calandria tube through a first calandria tube sheet bore via the insertion tool, inserting a guide tool into the inner surface of the calandria tube and guiding a portion of the calandria tube through a second calandria tube sheet bore via the insertion tool and the guide tool.

IPC Classes  ?

  • G21C 19/20 - Arrangements for introducing objects into the pressure vesselArrangements for handling objects within the pressure vesselArrangements for removing objects from the pressure vessel

37.

PRESSURE TUBE-TO-END FITTING COUPLING AND METHOD OF ASSEMBLING NUCLEAR REACTOR FUEL CHANNEL ASSEMBLY

      
Application Number CA2018050765
Publication Number 2018/232522
Status In Force
Filing Date 2018-06-22
Publication Date 2018-12-27
Owner CANDU ENERGY INC. (Canada)
Inventor
  • Szczepan, Andrzej Piotr
  • Drossis, John

Abstract

A nuclear reactor core comprises a calandria having a shell and a tube sheet defining an aperture, a calandria tube coupled to the tube sheet and extending into the shell, a lattice tube coupled to the tube sheet and extending away from the shell, an end fitting body positioned at least partially in the lattice tube, a pressure tube positioned at least partially in the calandria tube and have an end secured to the end fitting body; and an end fitting liner positioned at least partially in the end fitting body coaxial with the pressure tube. An end of the end fitting liner adjacent the pressure tube includes a first inner surface having a roller clearance counter bore. The counter bore provides clearance to avoid contact between a rolling tool and the end fitting assembly.

IPC Classes  ?

  • G21C 1/08 - Heterogeneous reactors, i.e. in which fuel and moderator are separated moderator being highly pressurised, e.g. boiling-water reactor, integral-superheat reactor, pressurised-water reactor

38.

COMMUNICATIONS SYSTEMS AND METHODS FOR NUCLEAR REACTOR TOOLING

      
Application Number CA2018050769
Publication Number 2018/232525
Status In Force
Filing Date 2018-06-22
Publication Date 2018-12-27
Owner CANDU ENERGY INC. (Canada)
Inventor
  • Szczepan, Andrzej Piotr
  • Jamieson, Robert William
  • Drossis, John
  • Bravo, Cesar Antonio

Abstract

Systems and methods for transmitting communications to and from tooling for a nuclear reactor are provided. Some systems include first and second tools including first and second tool controllers positioned on a platform located adjacent a face of the nuclear reactor, and a tooling controller communicatively coupled to the first and second tool controllers, wherein the tooling controller is configured to receive a communication from the second tool controller, wherein the communication includes an identifier of an operating state of the second tool, generate a control signal for controlling the first tool based at least in part on the identifier of the operating state of the second tool, and transmit the control signal to the first tool controller. Some systems include a display, memory and a processor configured to render a reactor equipment representation comprising status indicators, receive status messages, and update status indicators based upon the status messages.

IPC Classes  ?

  • G21C 19/00 - Arrangements for treating, for handling, or for facilitating the handling of, fuel or other materials which are used within the reactor, e.g. within its pressure vessel
  • G21C 17/00 - MonitoringTesting
  • G21C 19/20 - Arrangements for introducing objects into the pressure vesselArrangements for handling objects within the pressure vesselArrangements for removing objects from the pressure vessel
  • G21D 3/00 - Control of nuclear power plant

39.

INSPECTION TOOL AND METHOD FOR NUCLEAR REACTOR FUEL CHANNEL ASSEMBLY

      
Document Number 03061072
Status Pending
Filing Date 2018-04-26
Open to Public Date 2018-11-01
Owner CANDU ENERGY INC. (Canada)
Inventor
  • Di Carlo, Kevin
  • Jamieson, Rob
  • Deadman, Jason

Abstract

An apparatus and a method for inspecting an interior surface and an exterior surface of an element of a fuel channel assembly within a nuclear reactor are disclosed. To inspect the surface of the element, the apparatus and the element are relatively positioned such that the element is in a subject area. A reflector assembly reflects the subject area or a portion of the subject area to be in a field of view of an imaging device, which captures image data of its field of view. The reflector assembly has at least one of a first reflector and a second reflector. The first reflector reflects the outer surface of the element to be in the field of view of the imaging device. The second reflector reflects the inner surface of the element to be in the field of view of the imaging device.

IPC Classes  ?

  • G21C 17/08 - Structural combination of reactor core or moderator structure with viewing means, e.g. with television camera, periscope, window
  • G02B 13/22 - Telecentric objectives or lens systems

40.

INSPECTION TOOL AND METHOD FOR NUCLEAR REACTOR FUEL CHANNEL ASSEMBLY

      
Application Number CA2018050490
Publication Number 2018/195663
Status In Force
Filing Date 2018-04-26
Publication Date 2018-11-01
Owner CANDU ENERGY INC. (Canada)
Inventor
  • Di Carlo, Kevin
  • Jamieson, Rob
  • Deadman, Jason

Abstract

An apparatus and a method for inspecting an interior surface and an exterior surface of an element of a fuel channel assembly within a nuclear reactor are disclosed. To inspect the surface of the element, the apparatus and the element are relatively positioned such that the element is in a subject area. A reflector assembly reflects the subject area or a portion of the subject area to be in a field of view of an imaging device, which captures image data of its field of view. The reflector assembly has at least one of a first reflector and a second reflector. The first reflector reflects the outer surface of the element to be in the field of view of the imaging device. The second reflector reflects the inner surface of the element to be in the field of view of the imaging device.

IPC Classes  ?

  • G21C 17/08 - Structural combination of reactor core or moderator structure with viewing means, e.g. with television camera, periscope, window
  • G02B 13/22 - Telecentric objectives or lens systems

41.

SYSTEM AND METHOD OF CLEANING A HEAT EXCHANGER

      
Document Number 03045162
Status Pending
Filing Date 2017-11-24
Open to Public Date 2018-06-07
Owner CANDU ENERGY INC. (Canada)
Inventor
  • Wilson, Paul
  • Visser, Peter
  • Spivak, Brent

Abstract

Methods and systems for cleaning inner surfaces of tubes in a heat exchanger. Some systems include a cleaning device having a nozzle configured to inject cleaning fluid into first and second tubes to perform different first and second cleaning cycles on the tubes, respectively, a controller configured to determine delivery parameters for the cleaning cycles based on a characteristic of each tube, and to control the cleaning device to perform the cleaning cycles based on the delivery parameters. Some methods include determining, with a controller, a tube in the heat exchanger engaged with a nozzle of a cleaning device for injecting a cleaning fluid into the tube during a cleaning cycle, a characteristic of the tube, and a delivery parameter of the cleaning cycle for the tube based on the characteristic of the tube; and performing the cleaning cycle for the tube based on the delivery parameter.

IPC Classes  ?

  • F28G 15/00 - CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OF BOILERS Details
  • B08B 9/023 - Cleaning the external surfaces
  • B08B 9/027 - Cleaning the internal surfacesRemoval of blockages
  • B08B 9/032 - Cleaning the internal surfacesRemoval of blockages by the mechanical action of a moving fluid, e.g. by flushing
  • B24C 1/00 - Methods for use of abrasive blasting for producing particular effectsUse of auxiliary equipment in connection with such methods
  • F23J 3/02 - Cleaning furnace tubesCleaning flues or chimneys
  • F28G 1/16 - Non-rotary, e.g. reciprocated, appliances using jets of fluid for removing debris

42.

SYSTEM AND METHOD OF CLEANING A HEAT EXCHANGER

      
Application Number CA2017000249
Publication Number 2018/098556
Status In Force
Filing Date 2017-11-24
Publication Date 2018-06-07
Owner CANDU ENERGY INC. (Canada)
Inventor
  • Wilson, Paul
  • Visser, Peter
  • Spivak, Brent

Abstract

Methods and systems for cleaning inner surfaces of tubes in a heat exchanger. Some systems include a cleaning device having a nozzle configured to inject cleaning fluid into first and second tubes to perform different first and second cleaning cycles on the tubes, respectively, a controller configured to determine delivery parameters for the cleaning cycles based on a characteristic of each tube, and to control the cleaning device to perform the cleaning cycles based on the delivery parameters. Some methods include determining, with a controller, a tube in the heat exchanger engaged with a nozzle of a cleaning device for injecting a cleaning fluid into the tube during a cleaning cycle, a characteristic of the tube, and a delivery parameter of the cleaning cycle for the tube based on the characteristic of the tube; and performing the cleaning cycle for the tube based on the delivery parameter.

IPC Classes  ?

  • F28G 15/00 - CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OF BOILERS Details
  • B08B 9/023 - Cleaning the external surfaces
  • B08B 9/027 - Cleaning the internal surfacesRemoval of blockages
  • B08B 9/032 - Cleaning the internal surfacesRemoval of blockages by the mechanical action of a moving fluid, e.g. by flushing
  • B24C 1/00 - Methods for use of abrasive blasting for producing particular effectsUse of auxiliary equipment in connection with such methods
  • F23J 3/02 - Cleaning furnace tubesCleaning flues or chimneys
  • F28G 1/16 - Non-rotary, e.g. reciprocated, appliances using jets of fluid for removing debris

43.

NUCLEAR FUEL CONTAINING A NEUTRON ABSORBER MIXTURE

      
Application Number 15549534
Status Pending
Filing Date 2016-02-11
First Publication Date 2018-02-08
Owner CANDU ENERGY INC. (Canada)
Inventor
  • Hong, In Seob
  • Dahmani, Mohamed

Abstract

Fuel bundles for nuclear reactors are provided, and can include a fuel element containing U-233, U-235, PU-239, and/or PU-241 fissile material, along with at least two neutron absorbers consisting of Gd, Dy, Hf, Er, and/or Eu, wherein the fissile material(s) and the at least two neutron absorbers are homogeneously mixed in the fuel element. Fuel bundles for nuclear reactors are also provided that include fuel elements having inner elements and outer elements, wherein at least one of the inner elements includes a homogeneous mixture of a fissile material and at least two neutron absorbers. Fuel elements for nuclear reactors are also provided, and can include U-233, U-235, PU-239, and/or PU-241 fissile material, along with at least two neutron absorbers consisting of Gd, Dy, Hf, Er, and/or Eu, wherein the fissile material(s) and the at least two neutron absorbers are homogeneously mixed in the fuel element.

IPC Classes  ?

  • G21C 3/58 - Solid reactor fuel
  • G21C 1/24 - Homogeneous reactors, i.e. in which fuel and moderator present an effectively homogeneous medium to the neutrons
  • G21C 3/328 - Relative disposition of the elements in the bundle lattice

44.

TORSIONAL TESTING APPARATUS AND METHOD

      
Application Number IB2017000010
Publication Number 2017/122080
Status In Force
Filing Date 2017-01-12
Publication Date 2017-07-20
Owner CANDU ENERGY INC. (Canada)
Inventor
  • Metzger, Donald, Ray
  • Gagnon, Andre, Roger

Abstract

An apparatus for torsion testing of a helical specimen. A headstock includes a rotatable spindle. A tailstock is aligned with the spindle along a central axis. A pair of gripping assemblies grip first and second ends of the specimen, respectively, and are supported by the headstock and the tailstock. Each of the pair of gripping assemblies includes a mandrel having a portion which tapers toward a first end which is insertable into the helical specimen, a cup having a tapered bore configured to receive a second end of the mandrel along with the corresponding end of the helical specimen, and a fastener configured to engage the second end of the mandrel and pull the mandrel into the cup to pinch the helical specimen. A camera is aimed between the pair of gripping assemblies and operable to capture images of the helical specimen.

IPC Classes  ?

  • G01N 3/26 - Investigating twisting or coiling properties
  • G21C 17/00 - MonitoringTesting
  • G01N 3/34 - Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces generated by mechanical means, e.g. hammer blows

45.

NUCLEAR FUEL CONTAINING A NEUTRON ABSORBER MIXTURE

      
Application Number IB2016000114
Publication Number 2016/128821
Status In Force
Filing Date 2016-02-11
Publication Date 2016-08-18
Owner CANDU ENERGY INC. (Canada)
Inventor
  • Hong, In Seob
  • Dahmani, Mohamed

Abstract

Fuel bundles for nuclear reactors are provided, and can include a fuel element containing U-233, U-235, PU-239, and/or PU-241 fissile material, along with at least two neutron absorbers consisting of Gd, Dy, Hf, Er, and/or Eu, wherein the fissile material(s) and the at least two neutron absorbers are homogeneously mixed in the fuel element. Fuel bundles for nuclear reactors are also provided that include fuel elements having inner elements and outer elements, wherein at least one of the inner elements includes a homogeneous mixture of a fissile material and at least two neutron absorbers. Fuel elements for nuclear reactors are also provided, and can include U-233, U-235, PU-239, and/or PU-241 fissile material, along with at least two neutron absorbers consisting of Gd, Dy, Hf, Er, and/or Eu, wherein the fissile material(s) and the at least two neutron absorbers are homogeneously mixed in the fuel element.

IPC Classes  ?

  • G21C 3/42 - Selection of substances for use as reactor fuel
  • G21C 3/328 - Relative disposition of the elements in the bundle lattice

46.

NUCLEAR FUEL CONTAINING A NEUTRON ABSORBER MIXTURE

      
Document Number 02976046
Status In Force
Filing Date 2016-02-11
Open to Public Date 2016-08-18
Grant Date 2023-07-11
Owner CANDU ENERGY INC. (Canada)
Inventor
  • Hong, In Seob
  • Dahmani, Mohamed

Abstract

Fuel bundles for nuclear reactors are provided, and can include a fuel element containing U-233, U-235, PU-239, and/or PU-241 fissile material, along with at least two neutron absorbers consisting of Gd, Dy, Hf, Er, and/or Eu, wherein the fissile material(s) and the at least two neutron absorbers are homogeneously mixed in the fuel element. Fuel bundles for nuclear reactors are also provided that include fuel elements having inner elements and outer elements, wherein at least one of the inner elements includes a homogeneous mixture of a fissile material and at least two neutron absorbers. Fuel elements for nuclear reactors are also provided, and can include U-233, U-235, PU-239, and/or PU-241 fissile material, along with at least two neutron absorbers consisting of Gd, Dy, Hf, Er, and/or Eu, wherein the fissile material(s) and the at least two neutron absorbers are homogeneously mixed in the fuel element.

IPC Classes  ?

  • G21C 3/42 - Selection of substances for use as reactor fuel
  • G21C 3/328 - Relative disposition of the elements in the bundle lattice

47.

Systems and methods for detecting a leaking fuel channel in a nuclear reactor

      
Application Number 14148026
Grant Number 09721684
Status In Force
Filing Date 2014-01-06
First Publication Date 2014-07-24
Grant Date 2017-08-01
Owner Candu Energy Inc. (Canada)
Inventor Zhai, Ben Bingyl

Abstract

Methods and systems for detecting an individual leaking fuel channel included in a reactor. One system includes a plurality of inlet lines and a plurality of outlet lines. Each of the plurality of inlet lines feeding annulus fluid in parallel to an annulus space of each of a first plurality of fuel channels included in the reactor, and each of the plurality of outlet lines collecting in parallel annulus fluid exiting an annulus space of each of a second plurality of fuel channels included in the reactor. In some embodiments, the system also includes a detector positioned at an outlet of each of the plurality of outlet lines configured to detect moisture in annulus fluid and identify a first position of an individual leaking fuel channel, and an isolation valve positioned at an inlet of each of the plurality of inlet lines operable to stop annulus fluid from circulating through one of the plurality of inlet lines and to identify a second position of the individual leaking fuel channel.

IPC Classes  ?

48.

SYSTEMS AND METHODS FOR DETECTING A LEAKING FUEL CHANNEL IN A NUCLEAR REACTOR

      
Document Number 02838551
Status In Force
Filing Date 2014-01-07
Open to Public Date 2014-07-18
Grant Date 2022-01-11
Owner CANDU ENERGY INC. (Canada)
Inventor Zhai, Ben Bingyl

Abstract

A system and method for detecting an individual leaking fuel channel included in a CANDUTM are provided. One system comprises: a plurality of inlet lines each feeding annulus fluid in parallel to annulus spaces of a corresponding plurality of fuel channels of a first grouping type; a plurality of outlet lines each collecting in parallel annulus fluid exiting the annulus spaces of a corresponding plurality of fuel channels of a second grouping type; a plurality of detectors each positioned at an outlet of one of the plurality of outlet lines and configured to detect moisture in the annulus fluid; and a plurality of isolation valves each positioned at an inlet of one of the plurality of inlet lines, each isolation valve operable to close and stop the annulus fluid from circulating through one of the plurality of inlet lines.

IPC Classes  ?