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公开(公告)号：US20230117993A1
公开(公告)日：2023-04-20
申请号：US18085428
申请日：2022-12-20
申请人： Holtec International
发明人： Krishna P. SINGH , Evan ROSENBAUM , Thomas G. HAYNES, III , John D. GRIFFITHS , Debabrata MITRA-MAJUMDAR , Indresh RAMPALL , Joseph Gerald Leo RAJKUMAR
摘要： A neutron absorbing insert for use in a fuel rack. In one aspect, the insert includes: a plate structure having a first wall and a second wall that is non-coplanar to the first wall; the first and second walls being formed by a single panel of a metal matrix composite having neutron absorbing particulate reinforcement that is bent into the non-coplanar arrangement along a crease; and a plurality of spaced-apart holes formed into the single panel along the crease prior to bending.
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公开(公告)号：US11594341B2
公开(公告)日：2023-02-28
申请号：US16633369
申请日：2018-09-21
发明人： Hiromu Okamoto , Hisanori Watanabe , Hidetaka Kafuku , Shunsuke Tanaka , Hiroki Mitsui , Yasuharu Suda , Takao Ito , Hayao Kurono , Shuhei Dobara , Takumi Hori
IPC分类号： G21C13/028 , G21C19/07 , E02B7/54
摘要： A pit gate includes a gate body which is inserted between a pool portion storing water and a canal portion connected to the pool portion and is configured to change a flow state of the water, and a seal portion (6) which is accommodated in a groove-shaped accommodation recess formed in the gate body and seals between the pool portion and the gate body. The seal portion (6) includes a low-rigidity portion (10) which is relatively easily deformed by a load according to a water pressure from the pool portion side, and a high-rigidity portion (11) which is provided on the pool portion side of the low-rigidity portion and is not easily deformed relatively by the load.
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公开(公告)号：US11410784B2
公开(公告)日：2022-08-09
申请号：US16779908
申请日：2020-02-03
申请人： Holtec International
发明人： Krishna P. Singh
IPC分类号： G21F5/10 , G21C13/02 , G21C19/07 , G21C19/08 , G21C19/40 , G21F5/00 , G21F5/06 , G21F5/12 , G21F5/14 , G21F5/002 , G21F5/008 , G21F5/012
摘要： A system for externally cooling a cask containing heat-emitting spent nuclear fuel includes the cask comprising a radiation shielding body defining an internal cavity configured to hold a canister containing the spent nuclear fuel. A continuously annular cooling jacket extends circumferentially around an external surface of the cask body. The cooling jacket may have a double shell construction including an internal cavity for a cooling medium which provides an external heat sink for absorbing heat radiated from the external wall surface of the cask generated by the spent nuclear fuel. The heat emitted by the spent nuclear fuel is absorbed by the cooling medium in the cooling jacket, thereby in turn cooling the cask. In one embodiment, the cooling medium may be dry ice which undergoes sublimation by absorbing the heat to change from solid to gaseous phase directly. The jacket may be formed of multiple segments.
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公开(公告)号：US20220215974A1
公开(公告)日：2022-07-07
申请号：US17648280
申请日：2022-01-18
摘要： A nuclear containment atmospheric filter including dedicated piping, valves, a control system and a chemical injection system to facilitate the use of a commercial nuclear power plant's Spent Fuel Storage Pool and Spent Fuel Storage Pool Cooling System to filter and cool contaminated air and steam vapor released from within a Reactor Containment Vessel/Building preventing vessel overpressure and radioactive release.
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公开(公告)号：US11217352B2
公开(公告)日：2022-01-04
申请号：US16599758
申请日：2019-10-11
申请人： NuScale Power, LLC
发明人： Michael Keller , Ross I. Snuggerud
IPC分类号： G21C19/07 , G21C19/18 , G21C1/32 , G21C13/02 , G21C17/10 , G21C19/02 , G21C19/32 , G21C1/08 , G21C19/20
摘要： An in-core instrumentation system for a reactor module includes a plurality of in-core instruments connected to a containment vessel and a reactor pressure vessel at least partially located within the containment vessel. A reactor core is housed within a lower head that is removably attached to the reactor pressure vessel, and lower ends of the in-core instruments are located within the reactor core. The in-core instruments are configured such that the lower ends are concurrently removed from the reactor core as a result of removing the lower head from the reactor pressure vessel.
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公开(公告)号：US20210335512A1
公开(公告)日：2021-10-28
申请号：US17316485
申请日：2021-05-10
摘要： A fuel assembly inspection system that utilizes a pressure transducer mounted to a utility's spent fuel handling tool to detect a relative change in depth of a fuel assembly during fuel inspections. The system then wirelessly transmits the signal to a fuel inspection recording system, which converts the signal to a relative height along the fuel assembly being viewed by a camera, and displays the relative height along with the applicable fuel assembly feature being viewed by the camera (e.g., nozzle, grid, span) via a text overlay on the video image of the inspection.
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公开(公告)号：US11017908B2
公开(公告)日：2021-05-25
申请号：US15973966
申请日：2018-05-08
摘要： A system for storing nuclear fuel, the system including a storage rack and a bearing pad. The storage rack includes an array of cells, each cell configured to receive and store nuclear fuel rods, a base plate configured to support the array of cells, and a support structure configured to support the base plate and to allow cooling fluid to circulate under and up through apertures in the base plate. The bearing pad is coupled to the support structure and is configured to limit lateral movement of the storage rack independent from lateral movement of the bearing pad. The base plate defines a base plate profile in a horizontal plane of the base plate, and the bearing pad defines a bearing pad profile in the horizontal plane of the base plate, wherein the bearing pad profile extends outside of the base plate profile.
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公开(公告)号：US20210122653A1
公开(公告)日：2021-04-29
申请号：US16493884
申请日：2018-04-19
IPC分类号： C02F9/00 , C02F1/00 , C02F1/20 , C02F1/36 , C02F1/38 , C02F1/42 , C02F1/463 , F04D7/08 , F04D29/22 , G21C3/33 , G21C3/334 , G21C19/07 , G21C19/307 , C02F1/32
摘要： A modular water purification system for a nuclear power plant includes a plurality of modules that may be selectively connected together directly or through the use of intermediary adapters in a plurality of arrangements. The modules may include a pump module, a FOSAR module, a particulate filtration module, a cross-flow filtration module, a degasification module, and/or a demineralization module, among other possible modules. The modules may have common interfaces so that they can be interconnected (directly or through intermediary adapters) in a variety of configurations for different purposes within the context of the nuclear power plant (e.g., filtering pool water; collecting large objects via vacuuming). Various modules may have form factors and/or mounting structures that are similar enough to the fuel assemblies of the plant that (1) the plant's fuel assembly handling equipment can grab, move, and reposition the modules, and/or (2) the modules may be stored in the fuel pool's storage rack.
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公开(公告)号：US10991472B2
公开(公告)日：2021-04-27
申请号：US14224655
申请日：2014-03-25
IPC分类号： G21C19/07
摘要： A neutron absorbing insert for use in a fuel rack. In one aspect, the insert includes: a plate structure having a first wall and a second wall that is non-coplanar to the first wall; the first and second walls being formed by a single panel of a metal matrix composite having neutron absorbing particulate reinforcement that is bent into the non-coplanar arrangement along a crease; and a plurality of spaced-apart holes formed into the single panel along the crease prior to bending.
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公开(公告)号：US20200373031A1
公开(公告)日：2020-11-26
申请号：US16871221
申请日：2020-05-11
申请人： Holtec International
发明人： Krishna P. Singh
IPC分类号： G21C19/07
摘要： A fuel rack for nuclear fuel assemblies includes a base plate and an array of cells for holding fuel assemblies. The array of cells includes: a plurality of first slotted plates slidably interlocked with one another to form a top portion of the array of cells, the plurality of first slotted plates formed of a first material; a plurality of second slotted plates slidably interlocked with one another to form a middle portion of the array of cells, the plurality of second slotted plates formed of a second material, the first and second materials being metallurgically incompatible; and a plurality of third slotted plates slidably interlocked with one another to form a bottom portion of the array of cells, the plurality of third slotted plates formed of the first material and connected to a top surface of the base plate.
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