公开(公告)号：US12176118B2

公开(公告)日：2024-12-24

申请号：US17223078

申请日：2021-04-06

Applicant: Hitachi-GE Nuclear Energy, Ltd.

Inventor： Sohei Fukui ,  Kazushige Ishida ,  Kazuo Tominaga ,  Motoi Tanaka ,  Tomoharu Hashimoto

IPC: G21F9/02 ,  B01D53/14 ,  B01D53/18 ,  B01D53/70 ,  B01D53/78 ,  B01D53/79 ,  G21C9/004 ,  G21C13/10 ,  G21F9/12

Abstract: There is provided an organic iodine trapping apparatus that can efficiently trap an organic iodine without using complicated or large equipment. An organic iodine trapping apparatus 30 is an apparatus that traps an organic iodine, including: a trapping vessel 1 through which gas containing an organic iodine is passed; an organic iodine remover 2 (Example: trihexyl (tetradecyl) phosphonium chloride, or the like) that is disposed in or injected into the trapping vessel 1 and decomposes the organic iodine; and a trapping material 3 that is disposed in or injected into the trapping vessel 1 and traps iodine ions generated by decomposition of the organic iodine, in which the trapping material 3 is a metal (Example: silver or the like) or a metal compound (Example: silver chloride, silver oxide, or the like).

公开(公告)号：US20240200679A1

公开(公告)日：2024-06-20

申请号：US18588722

申请日：2024-02-27

Applicant: HITACHI-GE NUCLEAR ENERGY, LTD.

Inventor： Hirotsugu KAWANAKA ,  Yoshihisa KIYOTOKI ,  Sei HIRANO ,  Daisuke HIRASAWA ,  Junya KANEDA

IPC: F16K25/04 ,  B22F10/28 ,  B22F10/64 ,  B33Y10/00 ,  B33Y40/20 ,  B33Y80/00 ,  C22C19/07 ,  C22F1/10 ,  F16K3/30

CPC classification number: F16K25/04 ,  B22F10/64 ,  B33Y40/20 ,  B33Y80/00 ,  C22C19/07 ,  C22F1/10 ,  B22F10/28 ,  B22F2301/15 ,  B33Y10/00 ,  F16K3/30

Abstract: To provide a fluid contact member whose corrosion resistance is particularly further improved than that in the related art. In order to solve this problem, a fluid contact member 10 includes a fluid contact portion 1 configured to be in contact with a fluid, the fluid contact portion 1 has a cobalt-based alloy phase 2 having a dendrite, and a compound phase 3 formed in an arm space of the dendrite and containing chromium carbide, and among a plurality of secondary arms 5 extending from one primary arm 4 constituting the dendrite, an average interval between adjacent secondary arms 5 is 5 μm or less. At this time, the average interval is preferably 3 μm or less. Further, the compound phase 3 is preferably formed discontinuously in the dendrite arm space.

公开(公告)号：US20240192175A1

公开(公告)日：2024-06-13

申请号：US18527544

申请日：2023-12-04

Applicant: Hitachi-GE Nuclear Energy, Ltd.

Inventor： Kaname SAGA ,  So KITAZAWA ,  Akihiko HIRANO ,  Yoshizumi FUKUHARA ,  Junta YAMADA

IPC: G01N29/07 ,  G01N29/24

CPC classification number: G01N29/07 ,  G01N29/2437 ,  G01N2291/02854

Abstract: An ultrasonic inspection apparatus includes a control device 12 that outputs a pulse signal for making an ultrasonic probe 11A transmit an ultrasonic wave to the ultrasonic probe 11A and that is supplied with a waveform signal obtained by converting the received ultrasonic wave from an ultrasonic probe 11B, and that computes a thickness reduction depth of a pipe 1 between the ultrasonic probe 11A and the ultrasonic probe 11B. The control device 12 computes the thickness reduction depth of the pipe 1 by selectively using a reception time of the ultrasonic wave transmitted from the ultrasonic probe 11A, reflected once by an inner surface 3 of the pipe 1, and received by the ultrasonic probe 11B, and a reception time of the ultrasonic wave transmitted from the ultrasonic probe 11A, reflected twice by the inner surface 3 of the pipe 1, and received by the ultrasonic probe 11B.

公开(公告)号：US11946554B2

公开(公告)日：2024-04-02

申请号：US17311726

申请日：2019-11-06

Applicant: HITACHI-GE NUCLEAR ENERGY, LTD.

Inventor： Hirotsugu Kawanaka ,  Yoshihisa Kiyotoki ,  Sei Hirano ,  Daisuke Hirasawa ,  Junya Kaneda

IPC: C22C19/07 ,  B22F10/64 ,  B33Y40/20 ,  B33Y80/00 ,  C22F1/10 ,  F16K25/04 ,  B22F10/28 ,  B33Y10/00 ,  F16K3/30

CPC classification number: F16K25/04 ,  B22F10/64 ,  B33Y40/20 ,  B33Y80/00 ,  C22C19/07 ,  C22F1/10 ,  B22F10/28 ,  B22F2301/15 ,  B33Y10/00 ,  F16K3/30

Abstract: To provide a fluid contact member whose corrosion resistance is particularly further improved than that in the related art. In order to solve this problem, a fluid contact member 10 includes a fluid contact portion 1 configured to be in contact with a fluid, the fluid contact portion 1 has a cobalt-based alloy phase 2 having a dendrite, and a compound phase 3 formed in an arm space of the dendrite and containing chromium carbide, and among a plurality of secondary arms 5 extending from one primary arm 4 constituting the dendrite, an average interval between adjacent secondary arms 5 is 5 μm or less. At this time, the average interval is preferably 3 μm or less. Further, the compound phase 3 is preferably formed discontinuously in the dendrite arm space.

公开(公告)号：US20240050893A1

公开(公告)日：2024-02-15

申请号：US18196774

申请日：2023-05-12

Applicant: Hitachi-GE Nuclear Energy, Ltd.

Inventor： Sohei FUKUI ,  Yoichi WADA ,  Kazuo TOMINAGA ,  Motoi TANAKA ,  Masaaki TANAKA ,  Daiki NUNOKAWA

IPC: B01D53/78 ,  B01D53/70 ,  B01D53/75 ,  B01D53/14

CPC classification number: B01D53/78 ,  B01D53/70 ,  B01D53/75 ,  B01D53/1487 ,  B01D53/1493 ,  B01D2257/202 ,  B01D2257/2068 ,  B01D2252/103

Abstract: A filtered containment venting system includes a filtered containment venting tank having: an organic iodine remover for collecting organic iodine; scrubbing water for collecting inorganic iodine; and an alkalizing agent for adding an action of buffering a pH value to the scrubbing water.

公开(公告)号：US11515051B2

公开(公告)日：2022-11-29

申请号：US16479989

申请日：2018-01-12

Applicant: Hitachi-GE Nuclear Energy, Ltd.

Inventor： Sohei Fukui ,  Takahisa Matsuzaki ,  Kazuaki Kito ,  Yoshihiko Ishii ,  Masataka Hidaka ,  Tomohiko Ikegawa ,  Katsuki Hamada

IPC: G21C9/008 ,  B01D53/22 ,  B01D69/08 ,  B01D71/02 ,  B01D71/64 ,  G21D5/00 ,  G21F9/02

Abstract: In view of above problems, an object of the invention is to provide a primary containment vessel venting system having a structure capable of continuously discharging vapor in a primary containment vessel out of the system and continuously reducing pressure of the primary containment vessel without discharging radioactive noble gases to the outside of the containment vessel and without using an enclosing vessel or a power source. In order to achieve the above object, an nuclear power plant of the invention includes a primary containment vessel which includes a reactor pressure vessel, a radioactive substance separation apparatus which is disposed inside the primary containment vessel and through which the radioactive noble gases do not permeate but vapor permeates, a vent pipe which is connected to the radioactive substance separation apparatus, and an exhaust tower which is connected to the vent pipe and discharges a gas, from which a radioactive substance is removed, to the outside.

公开(公告)号：US11378383B2

公开(公告)日：2022-07-05

申请号：US16605709

申请日：2018-04-06

Applicant: Hitachi-GE Nuclear Energy, Ltd.

Inventor： Yukihiro Murata ,  Hiroshi Seki ,  Yohei Sugimoto

IPC: G01B11/02 ,  G01B11/08 ,  G01B11/14 ,  G01D1/00 ,  G06F16/28 ,  G06F30/13 ,  G05D1/00

Abstract: A plant facility apparatus recognition system is provided, which appropriately recognizes a plant facility apparatus even in a plant facility in which a wireless facility and a marker are not able to be installed even when the shape of the plant facility apparatus is different from or has been changed from design data. The plant facility apparatus recognition system that uses a mobile device having a camera to recognize the plant facility apparatus to be subjected to work in the plant facility includes a characteristic length acquirer that acquires information on the pipe as a first characteristic length from an image obtained by causing the camera to image the plant facility apparatus and the pipe existing near the plant facility apparatus, and a characteristic length comparator that compares the first characteristic length with a second characteristic length acquired from the design data and related to the pipe.

公开(公告)号：US20220102019A1

公开(公告)日：2022-03-31

申请号：US17479126

申请日：2021-09-20

Applicant: Hitachi-GE Nuclear Energy, Ltd.

Inventor： Takashi Oohira ,  Shintaro Yanagisawa ,  Satoshi Oouchi ,  Nobuyuki Ota ,  Ryo Hamada ,  Hideyuki Hosokawa

IPC: G21F9/28

Abstract: A chemical decontamination method capable of improving the decontamination efficiency of chemical decontamination of a steam dryer in the RPV is provided. In particular, the decontamination method includes feeding a chemical decontamination aqueous solution into a reactor pressure vessel in which a steam dryer is arranged, and after chemical decontamination of the steam dryer, the water level of the chemical decontamination aqueous solution existing in the reactor pressure vessel is lowered to a first water level below the lower end of the steam dryer.

公开(公告)号：US20220025984A1

公开(公告)日：2022-01-27

申请号：US17311726

申请日：2019-11-06

Applicant: HITACHI-GE NUCLEAR ENERGY, LTD.

Inventor： Hirotsugu KAWANAKA ,  Yoshihisa KIYOTOKI ,  Sei HIRANO ,  Daisuke HIRASAWA ,  Junya KANEDA

IPC: F16K25/04 ,  B33Y40/20 ,  B22F10/64 ,  C22C19/07 ,  C22F1/10 ,  B33Y80/00

Abstract: To provide a fluid contact member whose corrosion resistance is particularly further improved than that in the related art. In order to solve this problem, a fluid contact member 10 includes a fluid contact portion 1 configured to be in contact with a fluid, the fluid contact portion 1 has a cobalt-based alloy phase 2 having a dendrite, and a compound phase 3 formed in an arm space of the dendrite and containing chromium carbide, and among a plurality of secondary arms 5 extending from one primary arm 4 constituting the dendrite, an average interval between adjacent secondary arms 5 is 5 μm or less. At this time, the average interval is preferably 3 μm or less. Further, the compound phase 3 is preferably formed discontinuously in the dendrite arm space.

公开(公告)号：US20210323085A1

公开(公告)日：2021-10-21

申请号：US17363826

申请日：2021-06-30

Applicant: Hitachi-GE Nuclear Energy, Ltd.

Inventor： Sei HIRANO ,  Yoshihisa KIYOTOKI ,  Hajime MIYATA ,  Hirotsugu KAWANAKA ,  Shinji MATSUSHITA ,  Hiroshi SHIRATORI

IPC: B23K20/12 ,  C22F1/10 ,  F16K15/02 ,  F16K25/00 ,  F16K3/12 ,  G21D1/02 ,  F16K3/02 ,  C22C1/04 ,  C23C24/10 ,  B22F3/115 ,  C22C19/07 ,  F01L3/02 ,  G21C17/022 ,  C23C28/02 ,  F01L3/08 ,  B23K26/342

Abstract: Intended is to improve the corrosion resistance of an overlay used in a nuclear power plant, and to reduce dissolution of cobalt from an overlay. The corrosion and wear resistant overlay 7 is formed along a surface of a base 2 by laser lamination modeling, and is configured from a plurality of metal layers 1a, 1b, 1c, and 1d of a Co-base alloy. The thickness of carbide eutectics that precipitate in the metal layers 1a, 1b, 1c, and 1d is the largest in the metal layer 1a closest to the base 2, and is gradually smaller in the metal layers 1b, 1c, and 1d farther away from the base 2. The intensity of the laser beam applied to form layers by laser lamination modeling is adjusted so that the carbide eutectics that precipitate in at least the outermost metal layer 1d have a controlled size of 10 μm or less.