WO2022004614A1 - Appareil de production de radio-isotopes, unité de réacteur nucléaire et procédé de production de radio-isotopes - Google Patents

Appareil de production de radio-isotopes, unité de réacteur nucléaire et procédé de production de radio-isotopes Download PDF

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Publication number
WO2022004614A1
WO2022004614A1 PCT/JP2021/024242 JP2021024242W WO2022004614A1 WO 2022004614 A1 WO2022004614 A1 WO 2022004614A1 JP 2021024242 W JP2021024242 W JP 2021024242W WO 2022004614 A1 WO2022004614 A1 WO 2022004614A1
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WO
WIPO (PCT)
Prior art keywords
capsule
capsule unit
reactor
radioisotope
container
Prior art date
Application number
PCT/JP2021/024242
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English (en)
Japanese (ja)
Inventor
淳 藤田
大輔 曽田
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三菱重工業株式会社
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Publication of WO2022004614A1 publication Critical patent/WO2022004614A1/fr

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    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
    • G21F7/00—Shielded cells or rooms
    • G21F7/06—Structural combination with remotely-controlled apparatus, e.g. with manipulators
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21G—CONVERSION OF CHEMICAL ELEMENTS; RADIOACTIVE SOURCES
    • G21G1/00—Arrangements for converting chemical elements by electromagnetic radiation, corpuscular radiation or particle bombardment, e.g. producing radioactive isotopes
    • G21G1/02—Arrangements for converting chemical elements by electromagnetic radiation, corpuscular radiation or particle bombardment, e.g. producing radioactive isotopes in nuclear reactors
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21K—TECHNIQUES FOR HANDLING PARTICLES OR IONISING RADIATION NOT OTHERWISE PROVIDED FOR; IRRADIATION DEVICES; GAMMA RAY OR X-RAY MICROSCOPES
    • G21K5/00—Irradiation devices
    • G21K5/08—Holders for targets or for other objects to be irradiated

Definitions

  • the present invention relates to a radioisotope production apparatus, a nuclear reactor unit, and a method for producing a radioisotope.
  • Patent Document 1 describes that a radioactive isotope is produced by inserting a raw material into an instrumentation tube of a nuclear reactor and irradiating the raw material with neutrons. Patent Document 1 describes that a radioactive isotope is produced by moving a holding structure containing a raw material from a tube of a delivery system to an instrumentation tube.
  • Patent Document 1 inserts a raw material into a nuclear reactor to obtain a radioactive isotope.
  • the radioactive isotopes produced in this way irradiate the surroundings and therefore need to be controlled.
  • the present disclosure solves the above-mentioned problems, and is a radioisotope production apparatus and a reactor capable of inserting a raw material into a reactor to make it a radioisotope and appropriately managing the produced radioisotope. It is an object of the present invention to provide a method for producing a unit and a radioisotope.
  • the radioisotope production apparatus is a capsule unit in which a plurality of capsules containing RI raw materials, which are raw materials for radioisotopes, are connected in series.
  • a radioisotope manufacturing apparatus for transporting a radioisotope to the inside of the reactor and recovering from the inside of the reactor, the driving device for transporting the capsule unit and the transporting of the capsule unit between the driving device and the reactor. It is provided with a shielding container arranged in a path and shielding the periphery of the capsule unit, and an isolation mechanism for isolating the activated capsule from the outside.
  • the reactor unit according to the present disclosure is arranged in the radioisotope production apparatus described above, the reactor, and the outer space around the reactor. And a reactor building that shields the reactor.
  • the radioisotope production method is a capsule unit in which a plurality of capsules containing a RI raw material which is a raw material of a radioisotope are connected in series.
  • a radioisotope production method for transporting the capsule unit into the reactor and recovering it from the reactor the step of transporting the capsule unit into the reactor and the capsule unit between the transport device and the reactor.
  • the step of moving the capsule unit transported into the reactor to a shielding container arranged in the transport path and shielding the periphery of the capsule unit, and the activated capsule arranged in the shielding container are isolated from the outside. It is provided with a step of transporting in a state of being carried.
  • FIG. 1 is a schematic configuration diagram of an example of a nuclear power plant.
  • FIG. 2 is a schematic side view illustrating an instrumentation tube and a radioisotope manufacturing apparatus.
  • FIG. 3 is a schematic diagram showing a schematic configuration of the radioactive isotope production apparatus according to the present embodiment.
  • FIG. 4 is a schematic diagram of the capsule unit according to the present embodiment.
  • FIG. 5 is an explanatory diagram for explaining a method for producing a radioactive isotope.
  • FIG. 6 is an explanatory diagram for explaining a method for producing a radioactive isotope.
  • FIG. 7 is an explanatory diagram for explaining a method for producing a radioactive isotope.
  • FIG. 8 is an explanatory diagram for explaining a method for producing a radioactive isotope.
  • FIG. 9 is a schematic diagram showing the arrangement of the radioisotope production apparatus according to another embodiment.
  • FIG. 10 is a schematic diagram showing a schematic configuration of a radioisotope production apparatus according to another embodiment.
  • FIG. 11 is an explanatory diagram showing an example of a connection portion between the capsule unit 12 and the cable.
  • FIG. 12 is an explanatory diagram for explaining a method for producing a radioactive isotope.
  • FIG. 13 is an explanatory diagram for explaining a method for producing a radioactive isotope.
  • FIG. 14 is an explanatory diagram for explaining a method for producing a radioactive isotope.
  • FIG. 15 is an explanatory diagram for explaining a method for producing a radioactive isotope.
  • FIG. 16 is an explanatory diagram for explaining a method for producing a radioactive isotope.
  • FIG. 17 is an explanatory diagram for explaining a method for producing a radioactive isotope.
  • FIG. 18 is a schematic diagram showing a schematic configuration of a nuclear reactor unit according to another embodiment.
  • FIG. 19 is a schematic diagram showing a schematic configuration of a nuclear reactor unit according to another embodiment.
  • FIG. 1 is a schematic configuration diagram of an example of a nuclear power plant.
  • the nuclear power plant shown in FIG. 1 has a pressurized water reactor (PWR: Pressurized Water Reactor).
  • PWR Pressurized Water Reactor
  • the reactor containment vessel 100 the reactor vessel 101, the pressurizer 102, the steam generator 103, and the primary cooling water pump 104 of the pressurized water reactor are sequentially connected by the primary cooling water pipe 105.
  • a circulation path for the primary cooling water is configured.
  • the reactor vessel 101 stores the fuel assembly 120 in a hermetically sealed state, and is provided by the reactor vessel main body 101a and the reactor vessel lid 101b mounted on the reactor vessel main body 101a so that the fuel assembly 120 can be inserted and removed. It is configured.
  • the nuclear reactor generates heat energy by generating radiation in the fuel assembly 120 stored in the reactor vessel 101 and generating a nuclear reaction.
  • the reactor vessel main body 101a is provided with an inlet side tube stand 101c and an outlet side tube stand 101d for supplying and discharging light water as primary cooling water at the upper part.
  • the outlet side pipe stand 101d is connected to the primary cooling water pipe 105 so as to communicate with the inlet side water chamber 103a of the steam generator 103.
  • the inlet side pipe base 101c is connected to the primary cooling water pipe 105 so as to communicate with the outlet side water chamber 103b of the steam generator 103.
  • the steam generator 103 is provided with the inlet side water chamber 103a and the outlet side water chamber 103b partitioned by a partition plate 103c at the lower portion formed in a hemispherical shape.
  • the inlet side water chamber 103a and the outlet side water chamber 103b are separated from the upper side of the steam generator 103 by a pipe plate 103d provided on the ceiling portion thereof.
  • An inverted U-shaped heat transfer tube 103e is provided on the upper side of the steam generator 103. The end of the heat transfer tube 103e is supported by the tube plate 103d so as to connect the inlet side water chamber 103a and the outlet side water chamber 103b.
  • the inlet side water chamber 103a is connected to the inlet side primary cooling water pipe 105, and the outlet side water chamber 103b is connected to the outlet side primary cooling water pipe 105.
  • the secondary cooling water pipe 106a on the outlet side is connected to the upper end on the upper side partitioned by the pipe plate 103d, and the secondary cooling water pipe 106b on the inlet side is connected to the side portion on the upper side.
  • the secondary cooling water pipes 106a and 106b are connected to the steam turbine to form a circulation path for the secondary cooling water.
  • a generator is connected to the steam turbine.
  • a condenser for cooling the secondary cooling water, a pump, and the like are connected to the circulation path of the secondary cooling water.
  • the reactor vessel main body 101a is provided with a large number of instrumentation tube stands penetrating the lower mirror 101e, and the instrumentation tube 147A is connected to each of the instrumentation tube stands.
  • the instrumentation tube 147A includes an in-core instrumentation guide tube 147, a conduit tube 148, and a thimble tube 151.
  • the in-core instrumentation guide pipe is connected to the upper end of the inside of the furnace, while the conduit tube 148 is connected to the lower end of the outside of the furnace.
  • the upper end of each in-core instrumentation guide pipe 147 is connected to the lower core support plate, and upper and lower connecting plates for suppressing vibration are attached.
  • the conduit tube 148 is provided to reach the lower core plate, and a thimble tube 151 into which a neutron flux detector (not shown) capable of measuring a neutron flux is inserted is inserted.
  • the thimble tube 151 passes through the instrumentation tube base 146 and the in-core instrumentation guide tube 147 via the conduit tube 148, penetrates the lower core plate 128, and can be inserted to the fuel assembly 120.
  • a neutron flux detector is inserted into the instrumentation tube 147A.
  • the instrumentation tube 147A extends to the core 129, so that the inserted neutron flux detector is exposed to the neutron flux and detects the neutron flux.
  • the conduit tube 148 through which the thimble tube 151 is inserted extends to the core 129.
  • FIG. 2 is a schematic side view illustrating an instrumentation tube and a radioactive isotope production device.
  • the conduit tube 148 extends to the outside of the instrumentation tube base 146.
  • the reactor vessel 101 is supported in the reactor containment vessel 100.
  • a piping chamber 155 is formed below the reactor vessel 101.
  • the plurality of conduit tubes 148 are pulled out from the lower mirror 101e to the outside of the reactor vessel 101, curved in the piping chamber 155 and routed upward, and then their ends are fixed to the seal table 156 in the separate chamber.
  • the thimble tube 151 is inserted from the end of the fixed conduit tube 148. Then, the neutron flux detector is inserted into the thimble tube 151.
  • the seal table 156 is formed in a plate shape, and is fixed in a state where the end portion of the conduit tube 148 is penetrated from the bottom to the top.
  • the plurality of conduit tubes 148 are arranged at equal intervals and are planted from the upper surface of the seal table 156.
  • the instrumentation tube 147A is configured such that the conduit tube 148 is inserted into the thimble tube 151, but is not limited to this, and is a tube having an arbitrary shape into which the neutron flux detector and the capsule unit 12 described later are inserted. It may be there.
  • FIG. 3 is a schematic diagram showing a schematic configuration of the radioactive isotope production apparatus according to the present embodiment.
  • the radioisotope production apparatus 10 is arranged in the space where the seal table 156 is arranged.
  • the radioactive isotope production device 10 is connected to a conduit tube 30 arranged in parallel with the conduit tube 148.
  • the capsule unit 12 is inserted into the reactor vessel 101 of the reactor via the conduit tube 30, and the raw material is irradiated with radiation in the reactor vessel 101 to be converted into a radioisotope. , Recovered from the reactor vessel 101.
  • FIG. 4 is a schematic diagram of the capsule unit according to the present embodiment.
  • the capsule unit 12 according to the present embodiment is composed of a plurality of connected capsules 212, and is inserted into the instrumentation tube 147A.
  • the capsule unit 12 is a container in which the RI (Radioisotope) raw material M is stored.
  • RI raw material M is a raw material for radioactive isotopes.
  • the RI raw material is converted into a radioisotope by being exposed to a neutron flux in a place located in the reactor vessel 101 of the instrumentation tube 147A.
  • the RI raw material M is in the form of a block in which powder is baked and hardened, but the RI raw material M is not limited thereto.
  • the RI raw material for example, molybdenum-98 can be used.
  • the RI raw material becomes molybdenum-99 as a radioisotope when irradiated with a neutron flux.
  • the RI raw material is preferably, but not limited to, molybdenum.
  • RI raw materials include, for example, chromium-50, copper-63, dysprosium-164, erbium-168, holmium-165, iodine-130, ytterbium-191, iron-58, lutetium-176, palladium-102, phosphorus-31, It may be at least one of potassium-41, renium-185, samarium-152, selenium-74, sodium-23, strontium-88, ytterbium-168, ytterbium-176, and ytterbium-89.
  • the radioactive isotopes are chromium-51, copper-64, dysprosium-165, erbium-169, formium-166, iodine-131, and ytterbium-192, respectively.
  • the capsule 212 includes a case portion 220 in which the RI raw material M is stored, a connected portion 222 attached to the end portion of the case portion 220, and a connecting portion 224 connected to the connected portion 222.
  • the connecting portion 224 connected to the connected portion 222 of one capsule 212 is also connected to the connected portion 222 of the other capsule 212, so that the capsules 212 are connected in series. ..
  • the connecting portion 224 is a member that connects the capsules 212 to each other.
  • the connecting portion 224 is provided in each of the connected portion 222 on one end side of the capsule 212 and the connected portion 222 on the other end side.
  • the connected portion 222 on one end side is also connected to another capsule 212, and the connected portion 222 on the other end side is connected to another capsule 212 connected to one end side. Is connected to a different capsule 212.
  • the connecting portion 224 is connected only to the connected portion 222 on one side, and the connecting portion 224 is connected to the connected portion 222 on the other side. It does not have to be.
  • the connecting portion 214 is provided on the connected portion 222 on the side where the connecting portion 224 of the capsule 212T at the end is not connected.
  • the connection portion 214 is connected to the radioactive isotope production apparatus 10.
  • the connection portion 214 of the present embodiment is formed of a permanent magnet.
  • the capsule unit 12 is assembled by connecting the connecting portion 224 to the connected portion 222 of the capsule 212 and the connected portion 222 of the other capsule 212, and connecting the capsule 212 and the other capsule 212.
  • each capsule 212 is connected in series via a connecting portion 224.
  • the capsule unit 12 may be stored, for example, in a rolled state. Since the capsule unit 12 connects the capsules 212 to each other by the connecting portion 224, the capsule unit 12 can be appropriately wound.
  • the capsule unit 212 is not limited to containing the RI raw material M in all of the plurality of capsules 212 to be connected, and the RI raw material M may be stored in at least a part of the capsules 212.
  • the RI raw material M may not be stored in the capsule 212S at the beginning or the capsule 212T at the end.
  • the case portion 220 of the capsules 212S and 212T may be a solid member rather than a hollow member.
  • the radioisotope production device 10 includes a transfer device 14, a base 16, a fastening device 18, a shielding container 20, and a closing mechanism 22.
  • the transport device 14 transports the capsule unit 12.
  • the transport device 14 includes a drive device 40, a cable 42, and a connection terminal 44.
  • the drive device 40 inserts and pulls out the cable 42.
  • the drive device 40 of the present embodiment houses the cable 42 inside.
  • the cable 42 has predetermined rigidity and flexibility and moves along the conduit tube 30 and the instrumentation tube 147A.
  • the cable 42 has a predetermined rigidity so that the capsule unit 12 can be pushed into the reactor vessel 101 side, that is, the reactor side along the conduit tube 30 and the instrumentation tube 147A. Further, since the cable 42 has flexibility, it is deformed along the conduit tube 30 and the instrumentation tube 147A.
  • the connection terminal 44 is fixed to the tip of the cable 42.
  • the connection terminal 44 is an electromagnet.
  • connection terminal 44 is connected to the connection portion 214 by magnetizing the pole that attracts the permanent magnet of the connection portion 214.
  • the connection terminal 44 is separated from the connection portion 214 by magnetizing the pole on the opposite side of the pole that attracts the permanent magnet of the connection portion 214. As a result, the connection terminal 44 can switch between connection and disconnection with the connection portion 214.
  • the base 16 supports the fastening device 18 and the shielding container 20.
  • the base 16 has two through holes 52 arranged in a region through which the capsule unit 12 and the cable 42 pass.
  • One through hole 52 connects the conduit tube 30 and the shielding container 20 placed on the base 16.
  • the other through hole 52 connects the shielding container 20 placed on the base 16 and the transport device 14.
  • the base 16 is provided with a shielding structure around the through hole 52 to shield the radiation emitted from the capsule unit 12 or the like passing through the through hole 52.
  • the shielding structure a material containing boron, lead, tungsten or the like may be used. Further, if it can be shielded by metal, a metal member may be arranged.
  • the fastening device 18 is arranged in the through hole 52 on the transport device 14 side of the base 16.
  • the fastening device 18 fastens the connection portion 214 of the capsule unit 12 passing through the through hole 52 and the connection terminal 44 of the transport device 14.
  • a male screw and a female screw are formed between the connection portion 214 and the connection terminal 44, and the fastening device 18 makes the connection portion 214 and the connection terminal 44, which are connected by a permanent magnet and an electromagnet, relative to each other.
  • the connection portion 214 and the connection terminal 44 are fastened with a screw structure.
  • the fastening mechanism 18 has a connection portion 214 and a connection terminal 44, while in the present embodiment, the connection terminal 44 is clamped and fixed, and the connection portion 214 is clamped and rotated to be screwed along the screw miso. Let me.
  • the fastening device 18 rotates the connecting portion 214 by, for example, the driving force of a motor.
  • the shielding container 20 is installed on the base 16 in a detachable state.
  • the shielding container 20 is a member having a passage 60 formed inside.
  • the passage 60 is a linear space with both ends open.
  • the passage 60 is preferably a straight line as in the present embodiment, but it may be open at both ends and may have a curved portion.
  • the passage 60 is a path through which the capsule unit 12 and the cable 42 pass. Further, the passage 60 is a space in which the activated capsule unit 12 is held.
  • the shielding container 20 shields the radiation emitted from the capsule unit 12 or the like arranged in the passage 60.
  • the shielding container 20 By forming the shielding container with a material containing boron, lead, tungsten, or the like, the radiation emitted from the capsule unit 12 can be shielded. Further, if the shielding container 20 can be shielded by the material and the thickness, boron, lead, tungsten or the like may not be arranged.
  • the closing mechanism 22 includes a lid 62 that can open and close both ends of the passage 60 of the shielding container 20.
  • the closing mechanism 22 closes the passage 60 by closing both ends of the passage 60 with the lid 62.
  • the closing mechanism 22 opens the passage 60 by moving the lid 62 from a position facing the passage 60.
  • the rotation axis of the lid 62 is arranged on the upper side of the shielding container 20, the lid 62 is rotated about the horizontal direction, and the lid 62 is opened and closed with respect to the passage 60.
  • the lid 62 is arranged above the shielding container 20 in the open state.
  • the mechanism for opening and closing the lid 62 is not particularly limited.
  • FIGS. 5 to 8 are explanatory views for explaining the radioisotope production method, respectively.
  • 5 to 8 show the treatment of the radioactive isotope production method in order.
  • the processes of FIGS. 5 to 8 can be automatically performed by using various devices. Further, the operator may remotely control and execute the operation.
  • the radioactive isotope manufacturing apparatus (hereinafter, also simply referred to as the manufacturing apparatus) 10 is in a state where the shielding container 20 is separated from the base 16 (step S12).
  • the manufacturing apparatus 10 inserts the capsule unit 12 in which the non-activated MI raw material M is housed in the capsule into the passage 60 of the shielding container 20, and closes the passage 60 with the lid 62 (step S14).
  • the radiation of the capsule 212 arranged inside can be shielded, and the activated substance can be prevented from being scattered to the outside during the transportation of the shielding container 20.
  • the manufacturing apparatus 10 installs the shielding container 20 on the base 16 (step S16). Specifically, the shielding container 20 is moved to the upper side of the place where the base 16 is placed, then the lid 62 is opened to open the passage 60, and the shielding container 20 is placed on the base 16. As a result, the passage 60 and the through hole 52 are connected to each other.
  • the manufacturing device 10 sends out the cable 42 by the drive device 40 of the transport device 14, and connects the connection terminal 44 and the connection portion 214 (step S20).
  • the connection terminal 44 is brought close to the connection portion 214 in a state where the connection terminal 44 is a magnetic pole that attracts the connection portion 214, and the connection terminal 44 and the connection portion 214 are magnetically connected.
  • the cable 42 is pulled in by the drive device 40 by a predetermined distance in a state where the cable 42 and the capsule unit 12 are connected, and the connection portion between the connection terminal 44 and the connection portion 214 is connected to the fastening device 18. Face each other and turn off the electromagnet of the connection terminal 44 (step S22).
  • the manufacturing apparatus 10 is fastened to the connection terminal 44 and the connection portion 214 by the fastening device 18 (step S24). Specifically, the connection terminal 44 and the connection portion 214 are clamped by the fastening device 18, the connection terminal 44 is fixed, and the connection portion 214 is rotated to screw the connection portion 214 to the connection terminal 44 side. By doing so, we will conclude. When the fastening is completed, the clamp of the fastening device 18 is released.
  • the manufacturing apparatus 10 pushes out the cable 42 by the drive device 40, and moves the capsule unit 12 and the cable 42 to the conduit tube 30 side (step S26, step S28).
  • the manufacturing apparatus 10 moves the capsule unit 12 inside the conduit tube 30 and the instrumentation tube 147A to reach the reactor vessel 101, that is, the inside of the reactor.
  • the manufacturing apparatus 10 arranges the capsule unit 12 in the reactor vessel 101 for a predetermined period, for example, from several days to 10 days.
  • a fuel assembly in use is arranged in the reactor vessel 101.
  • the manufacturing apparatus 10 winds up the cable 42 by the driving apparatus 40 and collects the capsule unit 12 in the shielding container 20 (step S30).
  • the RI raw material M is converted into a radioisotope.
  • the manufacturing apparatus 10 moves the connection portion between the connecting terminal 44 of the capsule unit 12 collected in the shielding container 20 and the connecting portion 214 to a position facing the fastening device 18 (step S32).
  • the manufacturing apparatus 10 uses the fastening mechanism 18 to release the fastening between the connection terminal 44 and the connection portion 214 (step S34).
  • the manufacturing apparatus 10 separates the connection terminal 44 and the connection portion 214 by relatively rotating them on the opposite side of the fastening mechanism 18 from the time of screwing. Further, the connection terminal 44 is magnetized to the polarity opposite to that at the time of adsorption to generate a repulsive force between the connection terminal 44 and the connection portion 214.
  • the manufacturing apparatus 10 pushes out the cable 42 by the drive device 40, so that the capsule unit 12 is moved to the conduit tube 30 side by the cable 42 (step S36).
  • the manufacturing apparatus 10 moves the capsule unit 12 to a position where the entire capsule unit 12 is housed in the shielding container 20.
  • the manufacturing apparatus 10 moves the entire capsule unit 12 to a position where it is housed in the shielding container 20, and then collects the cable 42 by the driving device 40 so that the cable 42 does not exist in the passage 60 (step S38). ..
  • the manufacturing apparatus 10 removes the shielding container 20 from the base 16 and closes the passage 60 with the lid 62 (step S40).
  • the manufacturing apparatus 10 moves the shielding container 20 to a position where the radioactive isotope can be taken out (step S40), opens the lid 62 at a workable position, and takes out the capsule unit 12 (step S42).
  • the manufacturing apparatus 10 connects the shield container 20 to a path connected to the reactor storage container such as a conduit tube, moves the capsule unit 12 housed in the shield container 20 into the reactor container 101, and turns it into a radioactive isotope. After the conversion, the produced radioisotope can be recovered and transported while suppressing the influence of the radiation emitted from the radioisotope by recovering the radioisotope in the shielding container 20. In addition, the radioactive isotope can be produced while maintaining the shielded state by transporting the radioisotope by the route using the passage 60 as in the present embodiment.
  • FIG. 9 is a schematic diagram showing the arrangement of the radioisotope production apparatus according to another embodiment.
  • FIG. 10 is a schematic diagram showing a schematic configuration of a radioisotope production apparatus according to another embodiment.
  • FIG. 11 is an explanatory diagram showing an example of a connection portion between the capsule unit 12 and the cable.
  • the structures similar to those of the radioisotope production device 10 are designated by the same reference numerals, and detailed description thereof will be omitted.
  • the radioactive isotope production apparatus 10a is arranged in a room adjacent to the room in which the seal table 156 is arranged.
  • the reactor unit is connected to the reactor vessel 101 in the through hole 312 formed in the partition wall 8 that separates the room in which the seal table 156 is arranged and the room in which the radioisotope production apparatus 10a is arranged, and the reactor unit is connected to the piping chamber 155.
  • the conduit tube that has passed through is inserted.
  • FIG. 9 in order to show the through hole 312, a space is shown between the conduit tube and the through hole 312, but the space between the through hole 312 and the conduit tube is sealed and shielded. Similar to the instrumentation pipe 147A, the conduit tube passes through the piping chamber 155 from the room where the seal table 156 is arranged and is inserted into the reactor vessel 101.
  • the radioactive isotope production device 10a (hereinafter, also simply referred to as the production device 10a) is arranged outside the reactor building 8.
  • the arrangement position may be the same as that of the manufacturing apparatus 10.
  • the manufacturing apparatus 10a includes a transport device 14, a base 314, a shielding container 20a, a cutting device 80, a sensor 82, and a storage container 84.
  • the base 314 is a base that supports each part of the transport device 14, the shielding container 20a, the cutting device 80, the sensor 82, and the storage container 84.
  • the shielding container 20a includes a main body 70 and a lid 72.
  • the shield container 20a is arranged so that the lid 72 can be opened and closed on the upper surface of the main body 70.
  • the shield container 20a can open and close the lid 72 to place the capsule unit 12 on the main body 70.
  • the main body 70 is formed with a passage for arranging the capsule unit 12.
  • the cable 42 and the capsule unit 12 pass through the passage, similarly to the passage 60 of the shielding container 20.
  • One of the passages of the main body 70 is connected to the through hole 312, and the other is connected to the transport device 14.
  • the hole 76 is formed on the lower surface of the passage on the through hole 312 side.
  • a storage container 84 is arranged under the hole 76.
  • the shielding container 20a is provided with an opening / closing bottom 74 at the connection portion between the passage and the hole 76. The opening / closing bottom 74 switches between a state in which the passage and the hole 76 are connected and a state in which the hole 76 is disconnected.
  • the cutting mechanism 80 is arranged above the opening / closing bottom 74 of the passage of the shielding container 20a.
  • the cutting mechanism 80 cuts the connecting portion 222 of the capsule unit 12.
  • the cutting mechanism 80 is a cutting device, scissors, or the like.
  • the sensor 82 is arranged on the through hole 312, that is, on the reactor vessel side, rather than the cutting mechanism 80, in the movement path of the capsule unit 12. The sensor 82 detects the tip of the capsule unit 12 on the through hole 312 side by detecting whether or not the capsule unit 12 is present in the passage.
  • the storage container 84 stores the capsule 212 obtained by converting the RI raw material M into a radioisotope in a state of being divided into one capsule by the cutting device 80.
  • the storage container 84 is arranged below the hole 76.
  • the storage container 84 includes a container body 90 and a lid 92.
  • the container body 90 is provided with a space for accommodating the capsule 212.
  • the lid 92 closes the open surface of the container body 90. By closing the container body 90 with the lid 92, the storage container 84 can shield the radiation of the capsule 212 arranged inside, and the substance activated during the transportation of the storage container 84 is scattered to the outside. It can be prevented from being caused.
  • the storage container 84 may be formed of a material containing boron, lead, tungsten or the like. Further, the storage container 84 may be a metal member if it can be shielded by metal.
  • connection portion 214a of the capsule unit 12 of the present embodiment and the connection terminal 44a of the transfer mechanism 14 are connected by a detachable ball joint mechanism.
  • the connection portion between the connection portion 214a and the connection terminal 44a can move in the directions of two orthogonal axes with the ball portion of the ball joint as the axis, and is more flexible along the shape of the path when moving to the reactor vessel. Can be transformed into.
  • FIGS. 12 to 17 are explanatory views for explaining the radioisotope production method, respectively. 12 to 17 show the processing of the radioactive isotope production method in order.
  • the manufacturing apparatus 10a opens the lid 72 of the shielding container 20a and arranges the capsule unit 12 in the main body 70. Further, the connection portion 214 of the capsule unit 12 and the connection terminal of the transfer device 14 are connected. The capsule unit 12 is arranged and connected to the transport device 14. After arranging the capsule unit 12 in the storage container 20a, the lid 72 is closed.
  • the manufacturing apparatus 10a inserts the capsule unit 12 into the through hole 312 by sending the cable 42 in the transport apparatus 14, and moves the capsule unit 12 in the conduit tube (steps S102, 104). .. By pushing out the cable 42, the manufacturing apparatus 10a moves the capsule unit 12 in the conduit tube and reaches the inside of the reactor vessel 101.
  • the manufacturing apparatus 10a arranges the capsule unit 12 in the reactor vessel 101 for a predetermined period, for example, from several days to 10 days. A fuel assembly in use is arranged in the reactor vessel 101.
  • the manufacturing apparatus 10a winds up the cable 42 by the driving apparatus 40, passes the capsule unit 12 through the through hole 312 (step S106), and shields the container as shown in FIG. Collect on the 20a side.
  • the sensor 82 detects that the tip (end on the reactor side) has passed when the capsule unit 12 is collected
  • the manufacturing apparatus 10a assumes that the movement of the capsule unit 12 into the storage container 20a is completed, and winds the capsule unit 12. Finishing the picking (step S108).
  • the manufacturing apparatus 10a moves the capsule unit 12 by the transport mechanism 14 while detecting the position of the capsule unit by the sensor 82, and moves the connecting portion 224 on the reactor side to the position facing the cutting mechanism 80. (Step S110). When the movement is completed, the manufacturing apparatus 10a cuts the connecting portion 224 by the cutting mechanism 80, and separates one capsule 212 on the reactor side from the capsule unit 12 (step S112).
  • the manufacturing apparatus 10a opens the opening / closing bottom 74 to drop one separated capsule 212 from the hole 76 into the container body 90 of the storage container 84 (step S114). After that, the manufacturing apparatus 10a closes the opening / closing bottom 74 and closes the hole 76 (step S116).
  • the manufacturing apparatus 10a moves the capsule unit 12 by the transport mechanism 14 while detecting the position of the capsule unit by the sensor 82, and moves the connecting portion 224 on the reactor side to the position facing the cutting mechanism 80. And cut by the cutting mechanism 80 (step S118).
  • the manufacturing apparatus 10a opens the opening / closing bottom 74 to drop one separated capsule 212 from the hole 76 into the container body 90 of the storage container 84 (step S120).
  • the manufacturing apparatus 10a closes the opening / closing bottom 74 and closes the hole 76 (step S121).
  • the manufacturing apparatus 10a repeats the processes of steps S118 to S121 to separate capsules one by one from the capsule unit 12.
  • the manufacturing apparatus 10a repeats the processes from step S118 to step S121, and when a predetermined number of capsules 212 are accumulated in the storage container 84, the container body 90 is covered with a lid 92 to close the container main body 90, and another storage container 84 is closed. It is placed below the hole 76 (step S124).
  • the manufacturing apparatus 10a repeats the above process, separates the capsules 212 of the capsule unit 12 into one by one, and stores the capsules in the storage container 84 (step S128).
  • the manufacturing apparatus 10a opens the lid 72 of the shielding container 20a, disconnects the connecting portion 214a from which the capsule is separated from the connecting terminal 44a, and loads another capsule unit 12. Under the hole 76 of the shielding container 20a, a storage container 84 in which the capsule 212 is not arranged is arranged.
  • the manufacturing apparatus 10a can manufacture a radioactive isotope by repeating the above process.
  • the manufacturing apparatus 10a is provided with a cutting mechanism, and by separating each capsule into a storage container in the shielding container 20a and storing the capsule in a storage container, it is possible to store the activated capsule in a small space. As a result, the container for storing the capsule converted into a radioactive isotope can be made smaller. Further, since the treatment can be performed in the shielding container 20a, the object to be irradiated with radiation can be treated in an appropriate environment. In the present embodiment, a through hole 312 is provided under the passage of the shielding container, and the capsule is moved to the storage container 84, but the position of the through hole is not limited to this.
  • the shielding container may be provided with a through hole that is connected to the storage container and allows the cut capsule to be moved to the storage container. Further, the method of moving the capsule is not limited to dropping, and the capsule may be moved by the capsule unit or may be provided with a mechanism for moving the capsule separately, for example, a robot arm.
  • the storage container 84 is shown in the figure in which the lid 92 is separated, but it may be a lid that opens and closes, or a lid with a part of the upper surface opened.
  • FIG. 18 is a schematic diagram showing a schematic configuration of a nuclear reactor unit according to another embodiment.
  • FIG. 19 is a schematic diagram showing a schematic configuration of a nuclear reactor unit according to another embodiment.
  • the shield container 401 for collecting the capsule unit 12 the connection path 410 connecting the shield container 401 and the conduit tube 30, and the conduit tube 30 and the connection path It is provided with a passage switching mechanism 450 for switching between the 410 and the 410.
  • the shielding container 401 houses the activated capsule unit 12.
  • the connection path 410 is arranged outside the building where the piping room 155 is provided.
  • the capsule supply device 401 is mounted on the vehicle 402.
  • the vehicle 402 has a drive unit 404 and a mounting unit 406, and the shielding container 401 is mounted on the mounting unit 406.
  • the shielding container 401 shields the radiation emitted from the activated capsule unit 12 and the like.
  • the reactor unit includes a connection path 410 for connecting the shielding container 401 and the conduit tube 30.
  • the connection path 410 is fixed to the isolation wall 430 and is removable from the shielding container 401.
  • the shielding container 401 shields the radiation of the capsule 212 arranged inside.
  • the housing may be formed of a material containing boron, lead, tungsten or the like. Further, the shielding container 401 may be made of a metal material if the housing can be shielded by metal.
  • the connection path 410 includes the conduit tubes 412 and 418 and the shutters 414 and 420.
  • the conduit tube 412 is arranged outside the building and connects the shielding container 401 and the building.
  • the conduit tube 418 is connected to the conduit tube 412 via the shutter 414, and the other end is connected to the conduit tube 30 which is a movement path of the capsule unit of the radioisotope production apparatus 10.
  • a shutter 420 is arranged on the conduit tube 418.
  • the shutters 414 and 420 are structures for switching between closing and opening the path of the conduit tube. By closing the shutters 414 and 420, the path of the conduit tube is blocked, and the internal atmosphere does not leak to the outside. By opening the shutters 414 and 420, the capsule unit can pass through the inside.
  • the conduit tubes 412 and 418 include a pipe 430 and a guide mechanism 432 that is arranged inside the pipe 430 and assists the movement of passing members.
  • the guide mechanism 432 is a roller.
  • the guide mechanism 432 is connected to a drive source and rotates to move the capsule unit.
  • the guide mechanism 432 guides 12 of the capsule unit from the conduit tube 30 to the shielding container 401.
  • the guide mechanism 432 may have a transport function for transporting the capsule unit 12 toward the shield container 401.
  • the passage switching mechanism 450 is arranged at the connection portion between the conduit tube 30 and the connection path 410.
  • the passage switching mechanism 450 switches between a path through which the capsule unit 12 passes through the conduit tube 30 and a path through which the capsule unit 12 moves from the conduit tube 30 to the connection path 410.
  • the reactor unit transports the capsule unit 12 supplied to the shield container 20 by the drive device 40 of the radioactive isotope production device 10 to the reactor container 101.
  • the passage switching mechanism 450 connects the path through which the capsule unit 12 passes through the conduit tube 30.
  • the reactor unit moves the capsule unit 12 activated in the reactor vessel 101 to the radioactive isotope production device 10 by recovering the cable 42 by the drive device 40.
  • the passage switching mechanism 450 switches from the conduit tube 30 to the connection path 410 after the capsule unit 12 activated in the reactor vessel 101 is moved from the passage switching mechanism 450 to the radioisotope manufacturing apparatus 10. ..
  • the reactor unit can move the capsule unit 12 to the shielding container 401 by the drive device 40.
  • the reactor unit can be separated from the shield container 401 by providing a connection path 410 connecting to the outside of the building and making it removable from the shield container 401. Further, the reactor unit can easily convey the shield container 401 containing the capsule unit 12 by mounting the shield container 401 on the vehicle 402.
  • the reactor unit mounts the shield container 401 on the vehicle 402 and makes it transportable, so that the shield container 401 is placed in the facility of the reactor unit only while the processing is being executed, and is in a different location while not in use. Can be placed in.
  • the shield container 401 is used instead of the shield container 20 of the radioisotope production apparatus 10.
  • the configuration of the radioactive isotope production apparatus 10 can be simplified, and the activated capsule can be easily moved from the site where the reactor is arranged.
  • the shielding container 20 may be fixed to the radioisotope production apparatus 10 so that the capsule unit 12 which is not activated may be supplied to the passage 60. This eliminates the need to transport the capsule unit 12 activated by the shielding container 20, and the shielding container 20 can be fixed.
  • the capsule unit 12 before activation is mounted on the shield container 401, and the capsule unit 12 of the shield container 401 is transported to the shield container 20 of the radioisotope production device 10 by the drive device 40. good.
  • the embodiments of the present invention have been described above, the embodiments are not limited by the contents of the embodiments. Further, the above-mentioned components include those that can be easily assumed by those skilled in the art, those that are substantially the same, that is, those in a so-called equal range. Furthermore, the components described above can be combined as appropriate. Further, various omissions, replacements or changes of the components can be made without departing from the gist of the above-described embodiment.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Plasma & Fusion (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Radiation-Therapy Devices (AREA)

Abstract

La présente invention concerne un appareil de production de radio-isotopes dans lequel une unité de capsule, dans laquelle une pluralité de capsules contenant une matière première RI en tant que matière première pour un radio-isotope sont connectées en série, est transportée dans un réacteur nucléaire et récupérée à partir du réacteur nucléaire, l'appareil de production de radio-isotopes comprenant : un dispositif d'entraînement pour transporter l'unité de capsule ; une cuve de protection pour protéger la périphérie de l'unité de capsule, la cuve de protection étant positionnée dans le trajet de transport de l'unité de capsule entre le dispositif d'entraînement et le réacteur nucléaire ; et un mécanisme d'isolation pour isoler des capsules radioactivées de l'extérieur.
PCT/JP2021/024242 2020-06-30 2021-06-25 Appareil de production de radio-isotopes, unité de réacteur nucléaire et procédé de production de radio-isotopes WO2022004614A1 (fr)

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JP2020113292A JP7433148B2 (ja) 2020-06-30 2020-06-30 放射性同位体製造装置、原子炉ユニット及び放射性同位体の製造方法
JP2020-113292 2020-06-30

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009198500A (ja) * 2008-02-21 2009-09-03 Ge-Hitachi Nuclear Energy Americas Llc 原子炉の計装管において放射性同位体を生成する装置及び方法
JP2010249815A (ja) * 2009-04-15 2010-11-04 Ge-Hitachi Nuclear Energy Americas Llc 同時照射及び溶出カプセルおよびその使用方法
JP2011047935A (ja) * 2009-08-25 2011-03-10 Ge-Hitachi Nuclear Energy Americas Llc ケーブル駆動同位体送達システム

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009198500A (ja) * 2008-02-21 2009-09-03 Ge-Hitachi Nuclear Energy Americas Llc 原子炉の計装管において放射性同位体を生成する装置及び方法
JP2010249815A (ja) * 2009-04-15 2010-11-04 Ge-Hitachi Nuclear Energy Americas Llc 同時照射及び溶出カプセルおよびその使用方法
JP2011047935A (ja) * 2009-08-25 2011-03-10 Ge-Hitachi Nuclear Energy Americas Llc ケーブル駆動同位体送達システム

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