Abstract

Provided are a nuclear fuel manufacturing apparatus and nuclear fuel manufacturing method in which the distribution of a fissile substance, when manufacturing a nuclear fuel having thorium as the main starting material, can be adjusted. The nuclear fuel manufacturing apparatus (100) is provided with an ion-emitting unit (101), a charged particle accelerator (102) for accelerating the ion beam emitted from the ion-emitting unit (101), and a neutron-generating unit (103) for emitting neutrons when the accelerated ion beam is received. A holding section (105) for holding a container (104) that houses the thorium nugget, which is the object of the neutron irradiation, is provided so as to face the neutron-generating unit (103). An ion beam emitted by the ion-emitting unit (101) is accelerated by the charged particle accelerator (102) and is irradiated on the neutron-generating unit (103). The neutron-generating unit (103) that receives the ion beam emits neutrons and the neutrons are irradiated on a thorium aggregate inside the container (104), thereby doping the thorium aggregate with uranium 233.

IPC Classes  ?

• G21G 1/06 - Arrangements for converting chemical elements by electromagnetic radiation, corpuscular radiation, or particle bombardment, e.g. producing radioactive isotopes outside of nuclear reactors or particle accelerators by neutron irradiation
• G21C 21/00 - Apparatus or processes specially adapted to the manufacture of reactors or parts thereof
• H05H 5/02 - Direct voltage acceleratorsAccelerators using single pulses Details

Abstract

Grounded dummy electrode tubes (DT1, DT2) are arranged in the front and the rear of an accelerating electrode tube (T1). The negative electrode of a high-voltage direct-current power source (P1) is connected to the accelerating electrode tube (T1) via a switching element (SWR1). The positive electrode of a high-voltage direct-current power source (P2) is connected to the accelerating electrode tube (T1) via a switching element (SWF1). The accelerating electrode tube (T1) is also connected to one of the electrodes of a capacitor (C), and the other electrode of the capacitor (C) is grounded. The circuit including the accelerating electrode tube (T1), the high-voltage direct-current power source (P1), and the capacitor (C) forms a first-order lag system. While an ion beam passes a gap (GD1), an accelerating electric field that does not change over time is formed in the gap (GD1), and while the ion beam passes a gap (GD2), an accelerating electric field having an intensity that increases with time is formed in the gap (GD2).

IPC Classes  ?

• H05H 15/00 - Methods or devices for acceleration of charged particles not otherwise provided for
• H05H 5/03 - Accelerating tubes
• H05H 7/22 - Details of linear accelerators, e.g. drift tubes
• H05H 9/00 - Linear accelerators

Abstract

The primary-side circuit (110) is provided with a direct-current power source (111) and a direct-current motor (112). The secondary-side circuit (120) is provided with an electric power generator (121) and a rectifier circuit (122a). The direct-current motor (112) and the electric power generator (121) are connected by a rotary shaft (101) made of an insulating material, and the power of the direct-current motor (112) is transmitted to the electric power generator (121). The secondary-side circuit (120) is provided with a secondary battery (127) that stores the electric power generated by the electric power generator (121). The direct current that is output from the rectifier circuit (122a) and the direct current that is output from the secondary battery are selectively supplied to a secondary-side load resistance (125) by a switch (124). The output voltage of the secondary battery is monitored, and on the basis thereof, the direct-current motor is feedback-controlled.

IPC Classes  ?

• H02P 11/04 - Arrangements for controlling dynamo-electric converters for controlling dynamo-electric converters having a DC output
• H02P 7/06 - Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual DC dynamo-electric motor by varying field or armature current

Abstract

Provided are a neutron beam generating device and a neutron beam generating method with which it is possible to reduce the creation of hot spots in a neutron beam source. This neutron beam generating device is a neutron beam generating device that generates a neutron beam by irradiating a solid heavy-metal target with a proton beam and thereby causing a nuclear spallation reaction. The neutron beam generating device comprises: a proton beam accelerator that accelerates a proton beam; a solid heavy-metal target that generates a neutron beam by being irradiated with the proton beam; and a proton beam scanning unit that subjects the surface to be irradiated of the solid heavy-metal target to scanning irradiation with the proton beam.

IPC Classes  ?

• H05H 3/06 - Generating neutron beams
• G21K 5/04 - Irradiation devices with beam-forming means
• G21K 5/08 - Holders for targets or for objects to be irradiated
• H05H 6/00 - Targets for producing nuclear reactions
• H05H 15/00 - Methods or devices for acceleration of charged particles not otherwise provided for

Abstract

Provided is a charged particle accelerator that can be designed and produced more easily than conventional linear accelerators and with which it is possible to obtain an accelerating current of an arbitrary intensity. This charged particle accelerator comprises a plurality of charged particle accelerating units that are made up of accelerating electrodes lined up along respective travel trajectories, the charged particle accelerator being configured in a manner such that a plurality of ion beams emitted from an ion emitting unit can be accelerated in synchronization with one another by the respective charged particle accelerating units.

IPC Classes  ?

• H05H 15/00 - Methods or devices for acceleration of charged particles not otherwise provided for
• H05H 5/03 - Accelerating tubes
• H05H 7/22 - Details of linear accelerators, e.g. drift tubes
• H05H 9/00 - Linear accelerators

Abstract

By positioning, in a cascade, a plurality of acceleration electrode tubes (LA#1-LA#28), which impart an acceleration potential to a charged particle (2), and appropriately controlling the timing of acceleration voltage impression to each acceleration electrode tube (LA#1-LA#28) with a control device (8), it is possible to acquire acceleration energies every time the charged particle (2) jumps the gaps of the acceleration electrode tubes (LA#1-LA#28).

IPC Classes  ?

• H05H 15/00 - Methods or devices for acceleration of charged particles not otherwise provided for
• H05H 9/00 - Linear accelerators
• H05H 13/00 - Magnetic resonance acceleratorsCyclotrons