Abstract

A management equipment transfer apparatus which transfers management equipment, which tests and maintains an inside of a nuclear reactor vessel, inside the nuclear reactor vessel while being locked to the management equipment and the nuclear reactor vessel, includes: a cross beam configured to be lengthily disposed inside the nuclear reactor vessel in a transverse direction; a rod configured to be connected to a cross beam lengthily disposed inside the nuclear reactor vessel in a longitudinal direction; a bracket configured to be mounted in the rod to fix the management equipment; an arm configured to extend toward an inner peripheral surface of the nuclear reactor vessel and be connected to the cross beam; and rolling parts configured to be disposed at ends of the arm and the cross beam, contact the inner peripheral surface of the nuclear reactor vessel, and rotatably support the cross beam and the arm.

IPC Classes  ?

• G21C 17/013 - Inspection vehicles
• 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
• G21C 19/02 - Details of handling arrangements
• G21C 17/01 - Inspection of the inner surfaces of vessels
• G21C 17/00 - MonitoringTesting

Abstract

Provided herein is a remote inspection apparatus for a heating tube of a steam generator, the apparatus including a fixing unit installed in a flange surface of a hand hole of the steam generator in a fixed manner, and having one or more rail guiders for guiding a guide rail into the steam generator; the guide rail configured to be guided by the rail guider to enter between the heating tube and a divider plate inside the steam generator; a rail driving unit fitted at one end of the guide rail and arranged outside the steam generator, and having a bobbin around which a steel belt is wound; and a probe feeding unit configured to receive a driving force from the rail driving unit through the steel belt to be moved along the guide rail, and having a band shaped probe extending in a length direction and an inspection camera fitted at one end of the probe.

IPC Classes  ?

• H04N 7/18 - Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
• H04N 5/225 - Television cameras
• F22B 37/00 - Component parts or details of steam boilers
• G01N 21/954 - Inspecting the inner surface of hollow bodies, e.g. bores
• F27D 21/02 - Observation or illuminating devices

Abstract

An inspection apparatus for a penetration pipe of a nuclear reactor head comprising: a body; a probe module installed at the body and having a probe which is inserted in the penetration pipe to inspect damage of the penetration pipe; a fixing module installed along a longitudinal direction of the body and having an expanding cylinder which is inserted in the penetration pipe to support an inner diameter of the penetration pipe; and a rotating module installed in the longitudinal direction of the body and having an expanding cylinder which is inserted in the penetration pipe to support the inner diameter of the penetration pipe.

IPC Classes  ?

• G21C 17/013 - Inspection vehicles
• G21C 17/017 - Inspection or maintenance of pipe-lines or tubes in nuclear installations
• G21C 17/00 - MonitoringTesting
• G21C 17/007 - Inspection of the outer surfaces of vessels
• G21C 13/036 - Joints between tubes and vessel walls, e.g. taking into account thermal stresses the tube passing through the vessel wall, i.e. continuing on both sides of the wall

Abstract

The present invention relates to a machining, examination, and welding integral device for a nozzle, and more particularly, to a machining, examination, and welding integral device for a nozzle in which machining, examination, and welding can be made in the nozzle by one device. To this end, there is provided a machining, examination, and welding integral device for a nozzle including: a pair of caps provided to be separated from each other; a welding unit provided between the pair of caps to weld a junction part of the nozzle and a pipe; a examination unit coupled to one side of the welding unit to check whether the junction part is defective; and a machining unit coupled to the top of the welding unit to remove the surface of a welded portion of the junction part and/or process the welded portion of the junction part.

IPC Classes  ?

• B23K 28/02 - Combined welding or cutting procedures or apparatus
• B23K 31/00 - Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by any single one of main groups
• B23P 23/00 - Machines or arrangements of machines for performing specified combinations of different metal-working operations not covered by a single other subclass
• G21C 17/017 - Inspection or maintenance of pipe-lines or tubes in nuclear installations
• 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
• B23K 26/00 - Working by laser beam, e.g. welding, cutting or boring
• G21C 19/14 - 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 characterised by their adaptation for use with horizontal channels in the reactor core
• B23K 37/02 - Carriages for supporting the welding or cutting element
• F16L 55/18 - Appliances for use in repairing pipes

Abstract

Provided is a plug dismounting apparatus for a heavy water reactor fuel system. The plug dismounting apparatus for dismounting a plug (10) that is mounted on a fuel element in a heavy water reactor fuel system, and includes a locking rim (11) formed along an inner circumference thereof and a push pipe (12), includes: a clamp housing (100) made up of an outer housing (110) having a plurality of ball holes (111) formed in a radial direction and inserted into an inner diametrical region of the plug (10) and an inner housing (120) having a stem bush (121); locking balls (200) coupled to the ball holes (111) of the outer housing (110), and locked on the locking rim (11) so as to fix the clamp housing (100) to the plug (10); a guide liner (300) having a release groove (310) formed so as to guide release of the locking balls (200), and coupled so as to guide sliding of the inner and outer housings (120 and 110); elastic members (400) interposed between the guide liner (300) and the clamp housing (100), and restoring the released locking balls (200) so as to be elastically locked; a latch ram (500) coupled so as to slide into an inner diametrical region of the inner housing (120), and pressurizing an inner surface of the plug (10); a hollow main stem (600) screwed to the stem bush (121) of the inner housing (120) so as to slide the latch ram (500); and a sub-stem (700) coupled to an inner diametrical region of the main stem (600) and pressurizing the push pipe (12) so as to dismount the plug (10).

IPC Classes  ?

• G21C 13/06 - Sealing-plugs
• G21C 19/115 - Lifting devices or pulling devices adapted for co-operation with fuel elements or with control elements with latching devices and ball couplings

Abstract

An arc-shaped flexible printed circuit film-type endoscope using an imaging device with driving holes. The endoscope has an image photographing device and an object insertion device and further includes a plurality of driving holes which are formed at regular intervals in a longitudinal direction of the object insertion device, and a driving device which rotates while being sequentially inserted into the driving holes, thus moving the object insertion device. The endoscope controls movement into a small space, makes it easy to inspect a narrow heat transfer tube or gaps formed between heat transfer tubes, achieves high economic efficiency, increases the reliability of endoscopy, and increases life-span.

IPC Classes  ?

• A61B 1/00 - Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopesIlluminating arrangements therefor

Abstract

An inspecting device including a detachable probe has a link structure, and thus a subject having various diameters is tested. In addition, since various probes are changeably used in a scanner housing, ultrasonic wave testing and eddy current testing are simultaneously performed.

IPC Classes  ?

• G01N 29/24 - Probes
• G01N 29/265 - Arrangements for orientation or scanning by moving the sensor relative to a stationary material

Abstract

Provided is an apparatus for inspecting a structure including a heating tube, a tube sheet supporting the heating tube, and a flow distribution baffle, which are installed in a steam generator of a nuclear power plant, and more particularly, an apparatus for visually inspecting and removing a foreign object in gaps of a bundle of heating tubes of an upper portion of a tube sheet of a secondary side of a steam generator, in which a detector is inserted into gaps of a bundle of heating tubes of an upper portion of a secondary side of a steam generator so as to inspect sludge or foreign objects, and a foreign object remover removes foreign objects when foreign objects are discovered in the gaps of the heating tubes.

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
• F28G 15/02 - Supports for cleaning appliances, e.g. frames
• F28G 15/04 - Feeding or driving arrangements, e.g. power operation
• F22B 37/00 - Component parts or details of steam boilers

Abstract

Disclosed herein is a system for measuring the deflection of a rotating shaft in a wireless manner. The system includes a non-contact-type angle division device, a plurality of wireless contact-type displacement sensors, a plurality of wireless transmitters, a relay, and a data reader. The non-contact-type angle division device is placed on a vertical rotating shaft and measures and transmits the angle of rotation of the rotating shaft. The wireless contact-type displacement sensors are installed on the outer circumferential surface of the rotating shaft, and measure the strain of the rotating shaft. The wireless transmitters transmit data about the displacement of the rotating shaft measured by the wireless contact-type displacement sensor. The relay receives and relays transmission signals from the non-contact-type angle division device and the wireless transmitters. The data reader receives the transmission signals from the relay, and performs simulation reading.

IPC Classes  ?

• G01N 3/32 - Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces

Abstract

The present invention provides a non-destructive test apparatus which can be applied not only to a structure in dry conditions but also to a structure constructed under water or in a location to which it is difficult for a worker to gain access. The non-destructive test apparatus includes a support frame which is disposed adjacent to the target structure and has a vertical guide rail, and a vacuum box which moves upwards or downwards along the guide rail of the support frame. The vacuum box is attached to the target structure and creates a vacuum therein. The non-destructive test apparatus further includes a hoist which is provided on the upper end of the support frame to move the vacuum box upwards or downwards, a fastening unit which fastens the support frame and the vacuum box to the target structure, and a vacuum pump which creates a vacuum in the vacuum box. The non-destructive test apparatus further includes a defect detecting unit which measures a strength of vacuum in the vacuum box to determine whether the target structure is defective, and a control unit which controls the elements.

IPC Classes  ?

• G01N 15/08 - Investigating permeability, pore volume, or surface area of porous materials

Abstract

Disclosed herein is an arc-shaped flexible printed circuit film type endoscope using an imaging device. The endoscope includes an image photographing means and an object insertion means. The image photographing means includes a head housing to which an imaging device and an illumination means are mounted, and functions to photograph an image. The object insertion means includes an arc-shaped flexible thin foil, an insulating adhesive film, a circuit film and an insulating protective film which are layered and inserted into an interior of an object to be inspected. The object insertion means is connected at one end thereof to the image photographing means and connected at the other end to a transmission cable via a connector.

IPC Classes  ?

• A61B 1/04 - Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopesIlluminating arrangements therefor combined with photographic or television appliances

Abstract

An apparatus that visually inspects a state of sludge and foreign substances found between steam generator bundles positioned at an upper portion of a tube sheet of a steam generator of a nuclear power plant using a visual inspector mounted in a robot moving on an inner wall surface of the steam generator for removing the foreign substances.

IPC Classes  ?

• F22B 37/48 - Devices or arrangements for removing water, minerals or sludge from boilers
• B08B 7/00 - Cleaning by methods not provided for in a single other subclass or a single group in this subclass

Abstract

An upper bundle cleaning system of steam generator is disclosed which can clean heat transfer tubes and a plurality of tube support plates that support the heat transfer tubes and have slots, using a cleaning device transferred along a guide rail installed to an upper hand hole of the steam generator. The cleaning device is installed to an ascending/descending mechanism which is vertically transferable. The cleaning device includes a frame, at least one or more guide component, a spray component, and a hinge unit, such that the cleaning device is ascended and descended by the ascending/descending mechanism to clean the heat transfer tubes and the tube support plates.

IPC Classes  ?

• F28G 1/00 - Non-rotary, e.g. reciprocated, appliances
• F28G 15/00 - CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OF BOILERS Details

Abstract

A system for cleaning and inspecting stud bolt holes, and managing damage histories of the stud bolt holes is disclosed. The system allows an operator to clean stud bolt holes to inspect the stud bolt holes with the naked eye, and manage damage histories of the stud bolt holes. The stud bolt holes fix a nuclear reactor, a nuclear reactor coolant pump head and a pressure vessel main body thereto.

IPC Classes  ?

• A47L 5/38 - Built-in suction cleaner installations, i.e. with fixed tube system to which, at different stations, hoses can be connected
• A47L 5/00 - Structural features of suction cleaners