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公开(公告)号：US20240175450A1
公开(公告)日：2024-05-30
申请号：US18520522
申请日：2023-11-27
摘要： Jet pump clamps fit to modified jet pump assemblies at the riser pipe-restrainer bracket junction. The clamp can secure the restrainer bracket and riser pipe, relieving any welds between the same stress in the same, while preventing the restrainer bracket from moving. The clamp may include multiple members on either side of the restrainer bracket that fit into surfaces of the riser pipe. When these members are drawn together through clamping action, the underlying riser pipe is compressed. Similarly, vertically-adjustable members may seat into and/or through the restrainer bracket to hold the bracket steady. Jet pump assemblies may be prepared by forming grooves in the riser pipe and hole(s) in the restrainer bracket(s) and spherical indentations about the same. Clamps may then be installed on the grooves and through the hole(s) at installation or during a maintenance outage in a commercial nuclear power plant.
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公开(公告)号：US11420239B2
公开(公告)日：2022-08-23
申请号：US16914878
申请日：2020-06-29
IPC分类号： B08B9/032 , B08B9/043 , B05B1/16 , G21C15/25 , B05B13/06 , B05B15/652 , B05B12/16 , G21C17/017 , F04F5/46 , B08B9/047
摘要： A method of cleaning a jet pump assembly of a nuclear reactor may comprise inserting a cleaning tool into the jet pump assembly such that a front face of the cleaning tool is adjacent to an inner surface of the jet pump assembly and below a level of a first liquid in the jet pump assembly. The method may additionally comprise directing a plurality of front jets of a second liquid from a plurality of front orifices on the front face of the cleaning tool such that the plurality of front jets of the second liquid strikes the inner surface of the jet pump assembly. The method may further comprise maintaining a standoff distance between the front face of the cleaning tool and the inner surface of the jet pump assembly during the cleaning of the jet pump assembly.
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公开(公告)号：US20220199271A1
公开(公告)日：2022-06-23
申请号：US17131273
申请日：2020-12-22
发明人： David H. Hinds , Charles L. Heck
IPC分类号： G21C15/257 , G21C15/25
摘要： Piping loops can carry either forced or natural circulation coolant flow from and back to a reactor depending on reactor and coolant state, and can transition between the two. The loop flows into a heat exchanger that significantly cools the coolant and may even condense the coolant. The heat exchanger can drive natural circulation coolant flow, and a pump on the loop can drive forced circulation. Coolant direction may be reversed through the heat exchanger in different modes. Loops may be installed directly on existing ICSs, come off of a primary loop generating electricity commercially, or be their own loop around and penetrations to the reactor. Actuation valves may isolate and actuate the system merely by disallowing or allowing coolant flow. Different flow modes and coolant direction may be similarly achieved by pump actuation and/or valve opening/closing. Beyond the pump and simple valve actuation, loops may be entirely passive.
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公开(公告)号：US11139087B2
公开(公告)日：2021-10-05
申请号：US16381147
申请日：2019-04-11
发明人： Charles Lee Heck , Michael M. Cook
摘要： A method and apparatus of limiting power of a boiling water nuclear reactor system includes a reactor pressure vessel, a reactor core disposed in the reactor pressure vessel, a core shroud surrounding the reactor core, a downcomer region disposed between an inner surface of the reactor pressure vessel and the core shroud, a steam line connected to an upper end of the reactor pressure vessel and a condenser system that receives steam from the reactor pressure vessel. A portion of the condenser system condensate is returned to the reactor pressure vessel of the boiling water reactor inside the core barrel above the core rather than into the downcomer. Returning the condensate in this way increases the effectiveness of an isolation condenser system or if the condensate is a portion of the feedwater from the main condenser it provides an effective means to regulate core flow and core power.
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公开(公告)号：US20210098141A1
公开(公告)日：2021-04-01
申请号：US16981657
申请日：2017-12-29
摘要： A single-loop nuclear power plant with a pressurized coolant, comprising a power generating unit and a throttling device having an impeller, which are interconnected by an outlet pipe and a feed pipe, and a steam turbine connected to the throttling device and to a condenser connected to the throttling device, which device is a throttling steam generator vertically divided into a vapour zone, a high pressure zone, and a low pressure zone by horizontal sealed partitions. The high pressure zone is connected to the the feed pipe and is connected to the low pressure zone by throttling nozzles provided in the partition between said zones, and the low pressure zone is connected to the vapour zone by a vertical pipe which passes through the the horizontal sealed partitions and the high pressure zone. The single-loop nuclear power plant is provided with an electric motor to rotate the impeller.
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6.发明申请公开(公告)号：US20200328002A1
公开(公告)日：2020-10-15
申请号：US16381147
申请日：2019-04-11
发明人： Charles Lee Heck , Michael M. Cook
摘要： A method and apparatus of limiting power of a boiling water nuclear reactor system includes a reactor pressure vessel, a reactor core disposed in the reactor pressure vessel, a core shroud surrounding the reactor core, a downcomer region disposed between an inner surface of the reactor pressure vessel and the core shroud, a steam line connected to an upper end of the reactor pressure vessel and a condenser system that receives steam from the reactor pressure vessel. A portion of the condenser system condensate is returned to the reactor pressure vessel of the boiling water reactor inside the core barrel above the core rather than into the downcomer. Returning the condensate in this way increases the effectiveness of an isolation condenser system or if the condensate is a portion of the feedwater from the main condenser it provides an effective means to regulate core flow and core power.
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公开(公告)号：US10665356B2
公开(公告)日：2020-05-26
申请号：US15584684
申请日：2017-05-02
申请人： TerraPower, LLC
发明人： Ryan Abbott , Brian C. Kelleher , William M. Kerlin , Kevin Kramer , Jeffery F. Latkowski , Jon D. McWhirter , Robert C. Petroski , Joshua C. Walter , Jesse R. Cheatham, III , Anselmo T. Cisneros, Jr. , Ken Czerwinski , Bassem S. El-Dasher , Daniel Flowers , Charles Gregory Freeman , Mark A. Havstad , Christopher J. Johns
IPC分类号： G21C15/28 , G21C3/54 , G21C1/32 , G21C15/25 , G21C15/02 , G21C7/27 , G21C11/06 , G21C7/22 , G21C1/02
摘要： Configurations of molten fuel salt reactors are described that utilize neutron-reflecting coolants or a combination of primary salt coolants and secondary neutron-reflecting coolants. Further configurations are described that circulate liquid neutron-reflecting material around an reactor core to control the neutronics of the reactor. Furthermore, configurations which use the circulating neutron-reflecting material to actively cool the containment vessel are also described.
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公开(公告)号：US10557828B2
公开(公告)日：2020-02-11
申请号：US14597644
申请日：2015-01-15
发明人： Charles R. Barrett , Kevin J. Foley
摘要： An ultrasonic phased array transducer assembly having a single housing in which a plurality of phased array transducer subassemblies are mounted at a skewed angle relative to a leading face of the housing and to each other, with each transducer mounted on composite wedge(s) at different orientations within the housing.
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公开(公告)号：US20200032936A1
公开(公告)日：2020-01-30
申请号：US16592103
申请日：2019-10-03
摘要： A jet pump slip joint repair assembly includes at least one clamp and a bushing configured to be inserted in a bore of a diffuser and to surround a portion of an inlet mixer. The clamp includes a gripping surface and a gripping collar. The bushing includes a generally cylindrical sidewall, the sidewall configured to surround the portion of the inlet mixer, a grooved flange on an upper surface of the sidewall, at least one cutout between adjacent portions of the grooved flange, and a groove on an inner, bottom surface of the sidewall. The assembly also includes a seal in the groove. The seal is flexible and formed of a metallic material. The seal is configured to be compressed when the at least one clamp engages the bushing.
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公开(公告)号：US10436227B2
公开(公告)日：2019-10-08
申请号：US14885109
申请日：2015-10-16
申请人： Framatome Inc.
摘要： A sealing device for a jet pump of a boiling water reactor is provided. The jet pump includes an inlet mixer and a diffuser receiving the inlet mixer at a slip joint such that an outer circumferential surface of the inlet mixer is received in an inner circumferential surface of the diffuser at the slip joint. The diffuser includes a plurality of guiding fins, each guiding fin including a radially inner surface, a radially outer surface and lateral surfaces extending radially between the inner and outer surfaces. The sealing device includes a seal configured for sealingly contacting the outer circumferential surface of the inlet mixer and a collar configured for holding the seal against the outer circumferential surface of the inlet mixer. The collar includes portions configured for being received radially between the radially inner surfaces of the guiding fins and the outer circumferential surface of the inlet mixer. The sealing device further includes a clamp configured for contacting the radially outer surfaces of the guiding fins to axially clamp the guiding fins. A method of mounting a sealing device onto a slip joint of a jet pump of a boiling water reactor is also provided.
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