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151.发明公开公开(公告)号：US20240355487A1
公开(公告)日：2024-10-24
申请号：US18636378
申请日：2024-04-16
发明人： Kouji FUJIMURA , Junichi MIWA
摘要： Provided are a fuel assembly for a sodium-cooled metal fuel fast reactor, a reactor core, and a manufacturing method of the fuel assembly. Compared with conventional techniques, the fuel assembly and the reactor core can subject more MA to nuclear transmutation by allowing to increase the weight of MA to be loaded in the reactor core. One or more of an upper axial blanket fuel or lower axial blanket fuel in an inner core fuel assembly or outer core fuel assembly, or a radial blanket fuel in a radial blanket fuel assembly is a U—Pu-MA-Zr alloy of a low Pu enrichment lower in Pu enrichment than a core fuel, and has a MA enrichment and a Pu enrichment satisfying a relationship of 0 wt %
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公开(公告)号：US11942228B2
公开(公告)日：2024-03-26
申请号：US17082057
申请日：2020-10-28
发明人： Hiroko Sukeda , Naoshi Usui , Mayu Sasaki , Hideyuki Hosokawa , Tsuyoshi Ito
IPC分类号： G21C17/022 , G01N33/18 , G21D3/00
CPC分类号： G21C17/022 , G01N33/18 , G21D3/001
摘要： More accurate prediction of reactor water quality of a nuclear reactor is implemented. A device for prediction of reactor water quality of a nuclear reactor in a nuclear power plant is disclosed. The device stores a reactor water quality prediction model which is learned using learning data, and with which future reactor water quality is predicted. An explanatory variable of the reactor water quality prediction model includes a value in a predetermined period unit that is generated from data acquired in an operating nuclear power plant. The device generates the value in a predetermined period unit from data acquired in a target operating nuclear power plant, and acquires a predicted value of the reactor water quality in the target nuclear power plant based on the reactor water quality prediction model and the value in a predetermined period unit.
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公开(公告)号：US20240013935A1
公开(公告)日：2024-01-11
申请号：US18217077
申请日：2023-06-30
发明人： Kouji FUJIMURA , Junichi MIWA , Sho FUCHITA
摘要： There is provided a core of a fast reactor capable of achieving a sodium-cooled metal fuel fast reactor with high adaptability to a molten salt heat storage system, by flattening the output distribution and raising the coolant outlet temperature while suppressing deterioration of the core characteristic. A core of a fast factor is a fuel assembly obtained by densely disposing fuel rods within a wrapper tube, the fuel rod storing, within a cladding tube, hollow fuel in which Pu-enrichment is made to be a predetermined value within a range of 11 to 13 wt %. In the core of a fast factor, a first fuel assembly including a fuel rod with a large hollow diameter of the hollow fuel is loaded on the center side of the core, and a second fuel assembly including a fuel rod with a hollow diameter smaller than the hollow diameter of the hollow fuel of the first fuel assembly is loaded on the circumferential side of the core.
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公开(公告)号：US11473908B2
公开(公告)日：2022-10-18
申请号：US16439254
申请日：2019-06-12
发明人： Akinori Tamura , Naoyuki Kouno , Tetsuya Matsui , Shinobu Ookido , Hiroshi Hanaki , Hiroshi Okazawa
IPC分类号： G01B17/02
摘要： An ultrasonic inspection system includes an ultrasonic sensor which includes a piezoelectric element to transmit and receive an ultrasonic wave and a calibration piece, and a control device. The calibration piece includes a propagation portion extending along an upper surface of the piezoelectric element, and a propagation redirecting portion which is formed on one side in an extending direction of the propagation portion, and is connected to the piezoelectric element through a heat resistant adhesive. The propagation redirecting portion includes a slope inclined in a vertical direction to the upper surface of the piezoelectric element. The propagation redirecting portion is configured to reflect the ultrasonic wave incident on the propagation redirecting portion from the piezoelectric element on the slope and emit the ultrasonic wave toward the propagation portion, and reflect the ultrasonic wave which is reflected on an end surface on the other side in the extending direction of the propagation portion and incident on the propagation redirecting portion from the propagation portion on the slope and emit the ultrasonic wave toward the piezoelectric element.
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公开(公告)号：US20220213601A1
公开(公告)日：2022-07-07
申请号：US17143288
申请日：2021-01-07
发明人： Ryo HAMADA , Tsuyoshi ITO , Hideyuki HOSOKAWA , Nobuyuki OTA , Mayu SASAKI
摘要： A film-forming apparatus is connected to a carbon steel cleanup system pipe of a BWR plant. Formic acid and hydrogen peroxide are injected into the circulation pipe of the film-forming apparatus. An iron elution accelerator aqueous solution containing 3000 ppm of formic acid and 1500 ppm of hydrogen peroxide is brought into contact with the inner surface of the cleanup system pipe, and Fe2+ is eluted from the cleanup system pipe by formic acid, and hydroxyl radicals generated from hydrogen peroxide. The film-forming aqueous solution produced from the iron elution accelerator aqueous solution by injecting the nickel formate aqueous solution is brought into contact with the inner surface of the cleanup system pipe, and the Ni ions incorporated into the inner surface by the substitution reaction are reduced by the electrons generated at the time of elution of Fe2+ to form a Ni metal film on the inner surface thereof.
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公开(公告)号：US20210287811A1
公开(公告)日：2021-09-16
申请号：US17185009
申请日：2021-02-25
发明人： Koji FUJIMURA , Kazuhiro FUJIMATA , Sho FUCHITA , Junichi MIWA
摘要： The invention provides a core of a fast reactor including a sodium plenum installed above a core fuel, which is capable of reliably reducing a void reactivity, and an operation method thereof. The core of a fast reactor including the sodium plenum installed above the core fuel is characterized in that a tip of a primary control rod is inserted into a core fuel region, and a tip of a backup control rod is arranged above an upper end of the core fuel region for operation.
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公开(公告)号：US20210210231A1
公开(公告)日：2021-07-08
申请号：US17082057
申请日：2020-10-28
发明人： Hiroko SUKEDA , Naoshi USUI , Mayu SASAKI , Hideyuki HOSOKAWA , Tsuyoshi ITO
IPC分类号： G21C17/022 , G01N33/18
摘要： More accurate prediction of reactor water quality of a nuclear reactor is implemented. A device for prediction of reactor water quality of a nuclear reactor in a nuclear power plant is disclosed. The device stores a reactor water quality prediction model which is learned using learning data, and with which future reactor water quality is predicted. An explanatory variable of the reactor water quality prediction model includes a value in a predetermined period unit that is generated from data acquired in an operating nuclear power plant. The device generates the value in a predetermined period unit from data acquired in a target operating nuclear power plant, and acquires a predicted value of the reactor water quality in the target nuclear power plant based on the reactor water quality prediction model and the value in a predetermined period unit.
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公开(公告)号：US20210031264A1
公开(公告)日：2021-02-04
申请号：US16930416
申请日：2020-07-16
发明人： Yukari NAKAYAMA , Sei HIRANO , Yoshihisa KIYOTOKI
摘要： The invention provides a method of manufacturing a transition piece that has a high degree of freedom in adjustment of a length, a shape, or the like, can carry out a dissimilar metal welding easily, and is easy to perform, and a transition piece. The transition piece includes one end having the same composition as one material to be welded, another end having the same composition as another material to be welded, and an intermediate layer formed between the one end and the other end. The composition of the one end and the composition of the other end become the same as approaching a center. In the method of manufacturing the transition piece according to the invention, at least the intermediate layer among the one end, the other end, and the intermediate layer is formed by a additive manufacturing method.
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公开(公告)号：US10200577B2
公开(公告)日：2019-02-05
申请号：US14849867
申请日：2015-09-10
IPC分类号： H04N5/225 , G21C17/00 , G21C17/013 , G21C17/017 , H04N7/18 , F16L101/30
摘要： Since an investigation apparatus is connected through a cable and is remotely operated, the cable may be caught by an obstacle, thereby limiting a movement range of the investigation apparatus. An investigation system 15 includes an investigation apparatus 50 which moves to a position where an investigation target is investigated, by using a traveling section 51 and a support apparatus 30 which moves to a position where letting-off and winding of a cable 14 for an investigation apparatus which is connected to the investigation apparatus 50 are performed, by using a traveling section 31. The investigation apparatus 50 outputs an image of the investigation target which is captured by a camera section 53, to an investigation apparatus controller 40 via the cable 14 for an investigation apparatus.
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公开(公告)号：US10132779B2
公开(公告)日：2018-11-20
申请号：US15163841
申请日：2016-05-25
发明人： Masahiro Miki , Soushi Narishige , Isao Yoshida
IPC分类号： G01N27/90
摘要： To realize an object of providing an eddy current inspection device which is able to control a sensitivity decrease, and is able to reliably detect a defect. An eddy current inspection device of the present invention is provided with an orthogonal detection mode which measures an electromotive force signal using a coil pair which is configured by two coils within the first row coil group, a first intersection detection mode which measures the electromotive force signal using the first coil pair which is configured by the two coils within the first row and second row coil groups that are lined up in a direction which intersects with the scanning direction, and a second intersection detection mode which measures the electromotive force signal using the second coil pair which is configured by the two coils within the first row and second coil groups that are lined up in a direction in which a direction which intersects with the scanning direction is on the same side as the direction through which the first coil pair intersects and has a larger coil pair intersection angle than the coil pair intersection angle of the first coil pair.
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