Storage Container Systems For New And/or Irradiated Core Elements Patents (Class 376/272)
  • Patent number: 10955564
    Abstract: The present invention relates to a drying apparatus for drying a canister configured to transport and store spent nuclear fuels, a control method thereof, and a radiation shielding geometry for a radiation dosimeter configured to measure a radiation dose rate. An object of the present invention is to prevent a drying apparatus from being contaminated even in case of a damaged canister loaded with a spent nuclear fuel, by providing a non-contaminated circulation system and a contaminated circulation system, to easily assemble the drying apparatus to have a proper thickness depending upon a radiation dose rate, and to prevent a facility pipeline from being under stress by providing a radiation shielding geometry for a radiation dosimeter for measuring a radiation dose rate.
    Type: Grant
    Filed: January 12, 2018
    Date of Patent: March 23, 2021
    Assignee: SAE-AN ENGINEERING CORPORATION
    Inventors: Gyung Sun Chae, Byeong Mok Park, Kyoung Uk Shin, Jae Hyun Han, Hyeong Seop Jeon, Ki Sung Son, Do Yeong Jung, Jae Seok Park
  • Patent number: 10916355
    Abstract: A shipping container comprises a tubular or cylindrical shell having a closed end and an open end, a top end-cap removably secured to the open end of the tubular or cylindrical shell, and at least one fuel assembly compartment defined inside the shell. Each fuel assembly compartment includes elastomeric sidewalls and is sized and shaped to receive an unirradiated nuclear fuel assembly through the open end of the shell. The shipping container may further include a divider component, for example having a cross-shaped cross-section with ends of the cross secured to inner walls of the shell, and the divider component and the inner walls of the shell define the fuel assembly compartments. To load, the shipping container is arranged vertically and an unirradiated nuclear fuel assembly is loaded through the open end of the shell into each compartment, after which the open end is closed off by securing the top end-cap.
    Type: Grant
    Filed: November 27, 2017
    Date of Patent: February 9, 2021
    Assignee: BWXT mPower, Inc.
    Inventors: David M. Minor, Laurence L. Losh, Elbert C. Minnick, III, Charles Sanders
  • Patent number: 10886032
    Abstract: A method of storing nuclear fuel is described. In some cases, the method includes submerging at least a portion of a nuclear fuel rod in a storage pool containing an aqueous solution including at least one of polyhedral boron hydride anions or carborane anions. In some cases, the method includes adding a salt having a polyhedral boron hydride anion or carborane anion to a storage pool containing water and at least a portion of a nuclear fuel rod submerged in it. The method may include both of these. A storage pool is also described. The storage pool includes an aqueous solution having at least one of polyhedral boron hydride anions or carborane anions with at least a portion of a nuclear fuel rod submerged in the aqueous solution. A method of servicing a nuclear reactor core is also described.
    Type: Grant
    Filed: April 23, 2015
    Date of Patent: January 5, 2021
    Assignee: 3M Innovative Properties Company
    Inventors: Kevin S. Cook, Beth D. Bosley
  • Patent number: 10861612
    Abstract: A ventilated apparatus for storing and/or transporting high level radioactive waste. In one aspect, the invention is a ventilated apparatus comprising: an overpack body having an inner surface forming a cavity about a longitudinal axis. A bottom portion of the overpack body is formed by a plurality of segments. Each of the segments extends from a first end wall having a projection to a second end wall having a channel. The segments circumferentially surround a longitudinal axis and are arranged in an intermeshing and spaced-apart configuration such that the projections of the first end walls of the segments project into the channels of the second end walls of adjacent ones of the segments, thereby forming inlet ducts between adjacent ones of the segments. The inlet ducts form air inlet passageways from the external atmosphere to a bottom portion of the cavity.
    Type: Grant
    Filed: November 21, 2019
    Date of Patent: December 8, 2020
    Inventors: Krishna P. Singh, Paul Stefan Anton, Robert Mahorter
  • Patent number: 10847274
    Abstract: A seismic-resistant fuel storage system for a nuclear fuel pool includes a lined fuel pool and a fuel rack comprising tubular nuclear fuel storage cells attached to a common baseplate. Pedestals protrude downwardly from the baseplate supporting the rack on the pool base slab. Spaced embedment plates are fixedly anchored to the base slab to eliminate relative movement between the plates and pool liner. The embedment plates comprise upwardly open recessed receptacles each entrapping one of the rack pedestals therein. The receptacles are configured such that lateral movement of the fuel rack along the base slab in the event of a seismic event is constrained via engagement between receptacle walls and pedestals. Lateral seismic loads are not transferred to the pool liner. In some embodiments, the baseplates in the pool are coplanar and may be abutting engaged to mitigate rack movement during a seismic event.
    Type: Grant
    Filed: June 9, 2017
    Date of Patent: November 24, 2020
    Inventor: Krishna P. Singh
  • Patent number: 10784007
    Abstract: A racking device is provided for storing and/or transporting nuclear fuel assemblies. The racking device includes first stages (Ei?1, Ei+1) for neutron absorption and thermal conductivity, as well as second stages (E2i) for mechanical strength arranged so as to alternate with the first stages. Each first stage (Ei?1, Ei+1) includes first and second assemblies having interlacing notches (6a, 6b) made of aluminium alloy including boron. Each second stage (Ei) includes first and second structures (7a, 7b) stacked in a stacking direction (8) and each is made of one or more materials which are free of neutron-absorbing elements. The first and second structures (7a, 7b) are free of notches on their opposite edges in the stacking direction (8).
    Type: Grant
    Filed: December 1, 2016
    Date of Patent: September 22, 2020
    Assignee: TN INTERNATIONAL
    Inventors: Olivier Delage, Yohann Gore
  • Patent number: 10741295
    Abstract: A nuclear facility includes a fuel element pool which is filled with a cooling liquid. A fuel element rack, which is disposed in the fuel element pool, includes compartments for receiving fuel elements. The fuel elements received in the compartments are in direct contact with the cooling liquid in the fuel element pool. At least one cooling element is disposed in one of the compartments instead of a fuel element. The cooling element acts as a heat exchanger through which a coolant can flow, the cooling element is connected into a cooling circuit and the cooling element is immersed in the cooling liquid.
    Type: Grant
    Filed: September 15, 2016
    Date of Patent: August 11, 2020
    Assignee: Framatome GmbH
    Inventors: Thomas Fuchs, Leo Ornot, Markus Reck, Matthias Reuter
  • Patent number: 10660587
    Abstract: Radiation therapy systems and their components, including secondary radiation shields. At least some versions of the disclosed systems combine a radiation delivery device, a primary radiation shielding device, and a secondary shielding layer into an integrated, modular unit. This is accomplished by using a small direct beam shield capable of blocking a primary beam from a radiation delivery device. In turn, a thinner shielding layer can be used to surround the radiation delivery device and primary shielding device, enabling a single modular unit to be delivered to an installation site. In some embodiments, a bed may be disposed within the secondary shielding layer. In some embodiments, the system is configured to provide up to 4-pi (4?) steradians of radiation coverage to the bed from the radiation delivery device.
    Type: Grant
    Filed: June 17, 2019
    Date of Patent: May 26, 2020
    Assignee: The Board of Regents of the University of Texas System
    Inventors: Hak Choy, Steve Jiang, Robert Timmerman, Arnold Pompos
  • Patent number: 10660586
    Abstract: Radiation therapy systems and their components, including secondary radiation shields. At least some versions of the disclosed systems combine a radiation delivery device, a primary radiation shielding device, and a secondary shielding layer into an integrated, modular unit. This is accomplished by using a small direct beam shield capable of blocking a primary beam from a radiation delivery device. In turn, a thinner shielding layer can be used to surround the radiation delivery device and primary shielding device, enabling a single modular unit to be delivered to an installation site. In some embodiments, a bed may be disposed within the secondary shielding layer. In some embodiments, the system is configured to provide up to 4-pi (4?) steradians of radiation coverage to the bed from the radiation delivery device.
    Type: Grant
    Filed: June 17, 2019
    Date of Patent: May 26, 2020
    Assignee: The Board of Regents of the University of Texas Systems
    Inventors: Hak Choy, Steve Jiang, Robert Timmerman, Arnold Pompos
  • Patent number: 10650933
    Abstract: 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.
    Type: Grant
    Filed: November 6, 2015
    Date of Patent: May 12, 2020
    Assignee: HOLTEC INTERNATIONAL
    Inventor: Krishna P. Singh
  • Patent number: 10580540
    Abstract: A neutron absorber member including a tube having a split extending radially completely through a sidewall of said tube throughout the entire axial length thereof such that the absorber member has a C-shaped geometry formed by the split. The sidewall of the tube is resiliently biased radially outwards and comprised of a metal matrix composite that is configured to absorb neutrons emanation from a spent fuel assembly in a sufficient amount to thereby maintain subcriticality of said spent fuel assembly.
    Type: Grant
    Filed: January 5, 2018
    Date of Patent: March 3, 2020
    Assignee: CURTISS-WRIGHT FLOW CONTROL CORPORATION
    Inventors: Karl Scot Leuenroth, Matthew Lee Eyre, James Raymond Loeven
  • Patent number: 10464744
    Abstract: An entrainment-reducing assembly may include a container configured to hold a liquid. A venting arrangement may extend into an upper portion of the container and be configured to direct condensable and non-condensable gases into the container. A suction structure may extend into a lower portion of the container and be configured to carry out an extraction of excess liquid from the container caused by condensed gases. A deflector may be disposed between the suction structure and the venting arrangement within the container. As a result, an entrainment of uncondensed gases during the extraction of the liquid by the suction structure may be reduced or prevented, thereby protecting the pump from cavitation and failure.
    Type: Grant
    Filed: August 21, 2017
    Date of Patent: November 5, 2019
    Assignee: GE-Hitachi Nuclear Energy Americas LLC
    Inventors: Eric Paul Loewen, Brian Scott Triplett, Brett Jameson Dooies, Jordan E. Hagaman
  • Patent number: 10453578
    Abstract: A spent nuclear fuel rod canister includes a submersible pressure vessel including a casing that defines an interior cavity, the casing including a corrosion resistant and heat conductive material and a rack enclosed within the interior cavity and configured to support one or more spent nuclear fuel rods. The spent nuclear fuel rod canister includes a heat exchanger attached to the casing of the pressure vessel.
    Type: Grant
    Filed: March 29, 2016
    Date of Patent: October 22, 2019
    Assignee: NUSCALE POWER, LLC
    Inventors: Jose N. Reyes, Jr., Christopher Colbert
  • Patent number: 10393963
    Abstract: A composition for an optical waveguide is cured into a sheet to give a cured product. A difference in light transmittance with respect to light having a wavelength of 450 nm is 15% or less between this cured product and this cured product after retention in atmosphere at 175° C. for 40 hours, the light transmittance being calculated in terms of the cured product at a thickness of 50 ?m.
    Type: Grant
    Filed: February 12, 2019
    Date of Patent: August 27, 2019
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Naoyuki Kondou, Shinji Hashimoto, Toru Nakashiba, Shingo Maeda, Seiji Takagi
  • Patent number: 10311987
    Abstract: An autonomous facility for storing spent nuclear fuel includes a building forming an enclosed interior space containing a water-filled spent fuel pool. The pool includes fuel racks containing spent fuel assemblies which heat the water via radioactive decay. A passive cooling system includes a submerged heat exchanger in the pool and an air cooled heat exchanger located in ambient air outside the building at a higher elevation than the pool heat exchanger. A heat transfer working fluid circulates in a closed flow loop between the heat exchangers via unpumped natural gravity driven flow to cool the fuel pool. The air cooled heat exchanger may be enclosed in a concrete reinforced silo adjoining the building for impact protection. The building may include a cask pit formed integrally with the pool to allow fuel assembles to be removed from a transport cask and loaded into the fuel rack underwater.
    Type: Grant
    Filed: August 4, 2015
    Date of Patent: June 4, 2019
    Inventors: Krishna P. Singh, Joseph Rajkumar
  • Patent number: 10224123
    Abstract: A cask transport system includes a support assembly including a plurality of wheels and a support frame coupled to and supported by the wheels. The cask transport system also includes a tower disposed above the support assembly, the tower including a base portion and a tower frame coupled to the base portion, the tower frame movable relative to the base portion. The cask transport system also includes an upper beam assembly coupled to the tower frame, and a bottom block assembly coupled to the upper beam assembly, the bottom block assembly movable relative to the upper beam assembly.
    Type: Grant
    Filed: April 18, 2016
    Date of Patent: March 5, 2019
    Assignee: Konecranes Global Corporation
    Inventors: Steve Coogan, Michael Waedekin, Joseph A. Yustus
  • Patent number: 10128012
    Abstract: A packaging system for radioactive waste is robust, highly functional, and can be used for nearly all radioactive waste streams that require shielded packaging. The packaging system includes a modular container that is configured to receive modular shielding inserts. The packaging system can be used to store, transport, and dispose of radioactive waste.
    Type: Grant
    Filed: January 8, 2018
    Date of Patent: November 13, 2018
    Assignee: EnergySolutions, LLC
    Inventors: Robert Allen Lehnert, Brandon Damon Thomas, Steven Edward Sisley
  • Patent number: 10037826
    Abstract: A fuel rack apparatus includes: a base plate having an upper surface and a lower surface; and a plurality of storage tubes coupled to and extending upward from the upper surface of the base plate, the storage tubes arranged in a side-by-side arrangement to form an array of the storage tubes. Each of the storage tubes extend along a longitudinal axis and include: an outer tube having an inner surface defining an inner cavity; and an inner plate-assemblage positioned within the outer tube that divides the inner cavity into a plurality of interior flux trap chambers and a fuel storage cell.
    Type: Grant
    Filed: July 28, 2015
    Date of Patent: July 31, 2018
    Inventors: Krishna P. Singh, P. Stefan Anton
  • Patent number: 10008296
    Abstract: A passively-cooled spent nuclear fuel pool system in one embodiment includes a containment vessel comprising a thermally conductive shell and an annular reservoir surrounding the shell that holds a liquid coolant forming a heat sink. A spent fuel pool is disposed inside the containment vessel and includes a body of water in contact with a peripheral sidewall of the fuel pool. At least one spent nuclear fuel rod submerged in the body of water heats the water. The peripheral sidewall of the spent fuel pool is formed by a portion of the shell of the containment vessel adjacent to the fuel pool, thereby defining a shared common heat transfer wall. The heat transfer wall operates to transfer heat from the body of water in the spent fuel pool to the heat sink to cool the body of water. The heat transfer wall comprises metal in one embodiment.
    Type: Grant
    Filed: May 15, 2015
    Date of Patent: June 26, 2018
    Inventors: Krishna P. Singh, Joseph Rajkumar
  • Patent number: 9991010
    Abstract: 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.
    Type: Grant
    Filed: August 28, 2013
    Date of Patent: June 5, 2018
    Inventors: Krishna P. Singh, Charles W. Bullard, II
  • Patent number: 9793021
    Abstract: A transfer cask system for cooling spent nuclear fuel during the transfer from a spent nuclear fuel pool to a storage or transfer cask is disclosed. A canister containing spent nuclear fuel is inserted into a transfer cask. The transfer cask includes spacing components which define an annular region between the transfer cask and the canister. The transfer cask includes air inlets near a bottom end that permit air to flow through the defined annular region and exit at the open top of the transfer cask, thereby cooling the fuel within the canister. The transfer cask further comprises a neutron shield configured to absorb additional heat and shield radiation that may be generated within the canister. The transfer cask includes a transfer door that can open and close and has support rails that can support a spent nuclear fuel canister located in the transfer cask.
    Type: Grant
    Filed: January 22, 2014
    Date of Patent: October 17, 2017
    Assignee: NAC INTERNATIONAL INC.
    Inventors: George C. Carver, Vadim Z. Shtylman, Michael Yaksh, Holger Pfeifer
  • Patent number: 9761332
    Abstract: A nuclear reactor includes a reactor pressure vessel and a nuclear reactor core comprising fissile material disposed in a lower portion of the reactor pressure vessel. The lower portion of the reactor pressure vessel is disposed in a reactor cavity. An annular neutron stop is located at an elevation above the uppermost elevation of the nuclear reactor core. The annular neutron stop comprises neutron absorbing material filling an annular gap between the reactor pressure vessel and the wall of the reactor cavity. The annular neutron stop may comprise an outer neutron stop ring attached to the wall of the reactor cavity, and an inner neutron stop ring attached to the reactor pressure vessel. An excore instrument guide tube penetrates through the annular neutron stop, and a neutron plug comprising neutron absorbing material is disposed in the tube at the penetration through the neutron stop.
    Type: Grant
    Filed: June 9, 2014
    Date of Patent: September 12, 2017
    Assignee: BWXT mPower, Inc.
    Inventors: Daniel P Speaker, Gary W Neeley, James B Inman
  • Patent number: 9748009
    Abstract: A container and system for handling damaged nuclear fuel, and a method of making the same. In one embodiment, the invention is a damaged fuel container having a specially designed top cap that can be detachably coupled to the elongated tubular wall by simply translating the top cap into proper position within, the elongated tubular wall, wherein biased locking elements automatically lock the top cap to the elongated tubular wall. In another embodiment, the vent screens of the damaged fuel container are integrally formed rather than being separate components. In still other embodiments, the lower vent screens are arranged on an upstanding portion of the damaged fuel container. In an even further embodiment, the elongated tubular wall is formed by an extrusion process.
    Type: Grant
    Filed: August 20, 2012
    Date of Patent: August 29, 2017
    Inventor: Krishna P. Singh
  • Patent number: 9748010
    Abstract: The present invention concerns a hood for handling and confinement of at least two objects of slender shape, including an external enclosure and internal enclosures inside the external enclosure and at least one motor fixed above an internal enclosure and inside a barrel, the motor(s) being adapted to rotate the screw of the screw-nut mechanism of each internal enclosure and therefore the nut over a stroke A, and first and second mechanical control means, arranged in part above the cover of the external enclosure, respectively for manually guiding the internal enclosures in translation over a stroke A0 and manually pivoting the barrel in order to bring a holding member of one of the internal enclosures opposite the opening in the bottom of the external enclosure. Application to the handling and confinement of nuclear material sample holders.
    Type: Grant
    Filed: April 9, 2014
    Date of Patent: August 29, 2017
    Assignee: COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES
    Inventors: Sebastien Gay, Xavier Mognot
  • Patent number: 9748011
    Abstract: The invention relates to a packaging for transporting and/or storing radioactive materials, comprising a packaging body extending along a longitudinal direction, and further including at least one shock-absorbing cover mounted on one of both longitudinally opposite ends of the packaging body, the absorbing cover comprising attaching portions (44) on said packaging body, each attaching portion defining a clearing hole (58) through which an element (24) screwed in the packaging body passes. According to the invention, the attaching portion (44) has a deformable area (54) which, in the case of an outer bias on the absorbing cover leading to a contact strain between the screwed element (24) and the clearing hole (58), is designed to plastically deform.
    Type: Grant
    Filed: September 30, 2013
    Date of Patent: August 29, 2017
    Assignee: TN INTERNATIONAL
    Inventors: Eric Allan, Nasser Zahri, Cédric Mauvais
  • Patent number: 9728284
    Abstract: An apparatus for supporting radioactive fuel assemblies, such as spent nuclear fuel. In one aspect, the invention is an apparatus, which can be in the form of a fuel basket, fuel rack, or the like, in which polygonal storage tubes are used not only for their internal cells but are also strategically patterned to create resultant cells with their outside surfaces.
    Type: Grant
    Filed: November 5, 2013
    Date of Patent: August 8, 2017
    Inventors: Krishna P. Singh, Stephen J. Agace
  • Patent number: 9704605
    Abstract: An integrated storage, transportation and disposal system for used fuel assemblies is provided. The system includes a plurality of sealed canisters and a cask sized to receive the sealed canisters in side by side relationship. The plurality of sealed canisters include an internal basket structure to receive a plurality of used fuel assemblies. The internal basket structure includes a plurality of radiation-absorbing panels and a plurality of hemispherical ribs generally perpendicular to the canister sidewall. The sealed canisters are received within the cask for storage and transportation and are removed from the cask for disposal at a designated repository. The system of the present invention allows the handling of sealed canisters separately or collectively, while allowing storage and transportation of high burnup fuel and damaged fuel to the designated repository.
    Type: Grant
    Filed: November 29, 2016
    Date of Patent: July 11, 2017
    Assignee: UT-Battelle, LLC
    Inventors: John M. Scaglione, John C. Wagner
  • Patent number: 9685248
    Abstract: A neutron absorbing apparatus, for insertion into a fuel cell storage system, includes a corner spine, a first all and a second wall, each wall being affixed to the corner spine to form a chevron shape. Each wall includes an absorption sheet affixed to the corner spine, each absorption sheet being formed of a metal matrix composite having neutron absorbing particulate reinforcement, and a guide sheet affixed to and covering a fractional upper portion of the absorption sheet and extending over a top of the absorption sheet. The absorption sheet extends along the corner spine a greater length than the guide sheet.
    Type: Grant
    Filed: June 24, 2013
    Date of Patent: June 20, 2017
    Inventors: Stephen J. Agace, Stephen E. Thompson, John D. Griffiths, Richard M. Springman
  • Patent number: 9666318
    Abstract: An integrated storage, transportation and disposal system for used fuel assemblies is provided. The system includes a plurality of sealed canisters and a cask sized to receive the sealed canisters in side by side relationship. The plurality of sealed canisters include an internal basket structure to receive a plurality of used fuel assemblies. The internal basket structure includes a plurality of radiation-absorbing panels and a plurality of hemispherical ribs generally perpendicular to the canister sidewall. The sealed canisters are received within the cask for storage and transportation and are removed from the cask for disposal at a designated repository. The system of the present invention allows the handling of sealed canisters separately or collectively, while allowing storage and transportation of high burnup fuel and damaged fuel to the designated repository.
    Type: Grant
    Filed: November 29, 2016
    Date of Patent: May 30, 2017
    Assignee: UT-Battelle, LLC
    Inventors: John M. Scaglione, John C. Wagner
  • Patent number: 9666311
    Abstract: A nuclear fuel assembly having varying spacing between fuel rods is provided. The nuclear fuel assembly includes a bundle of fuel rods. The fuel rods are arranged in a first lattice with a non-uniform pitch between the fuel rods in the lowermost section of the fuel assembly and in a second lattice with a uniform pitch between the fuel rods in the uppermost section of the fuel assembly.
    Type: Grant
    Filed: May 10, 2012
    Date of Patent: May 30, 2017
    Assignee: AREVA NP
    Inventors: Robert Koch, Otmar Bender
  • Patent number: 9568252
    Abstract: A heat pipe based passive residual heat removal system for a spent fuel pool (3). Partitions (6) are arranged around an inside of the spent fuel pool. Evaporation-end heat pipes (4) are arranged between the outside of the partitions and an inner wail of the pool. The evaporation-end heat pipes have outlets that extend beyond the pool and are connected to an Inlet of an ascending pipe (10), and have inlets connected to an outlet of a descending pipe (5). Condensation-end heat pipes (7) have inlets connected to an outlet of the ascending pipe, and have outlets connected to an inlet of the descending pipe. The heat pipes cool the spent fuel pool. A heat exchange by phase change of working medium in the heat pipe leads to heat exchange of low temperature difference and high efficiency, relying on density difference for natural circulation drive.
    Type: Grant
    Filed: June 20, 2012
    Date of Patent: February 14, 2017
    Assignee: SHANGHAI NUCLEAR ENGINEERING RESEARCH & DESIGN INSTITUTE
    Inventors: Mingguang Zheng, Cheng Ye, Xiankang Dong, Guoxing Gu, Jinquan Yan, Yong Wang, Yu Chen, Xia Su, Yu Chen, Liuhua Shen, Libing Zhu, Wei Shi, He Sun
  • Patent number: 9543048
    Abstract: An integrated storage, transportation and disposal system for used fuel assemblies is provided. The system includes a plurality of sealed canisters and a cask sized to receive the sealed canisters in side by side relationship. The plurality of sealed canisters include an internal basket structure to receive a plurality of used fuel assemblies. The internal basket structure includes a plurality of radiation-absorbing panels and a plurality of hemispherical ribs generally perpendicular to the canister sidewall. The sealed canisters are received within the cask for storage and transportation and are removed from the cask for disposal at a designated repository. The system of the present invention allows the handling of sealed canisters separately or collectively, while allowing storage and transportation of high burnup fuel and damaged fuel to the designated repository.
    Type: Grant
    Filed: July 20, 2012
    Date of Patent: January 10, 2017
    Assignee: UT-BATTELLE, LLC
    Inventors: John M. Scaglione, John C. Wagner
  • Patent number: 9406409
    Abstract: A spent nuclear fuel rod canister includes a submersible pressure vessel including a casing that defines an interior cavity, the casing including a corrosion resistant and heat conductive material with a thermal conductivity of above about 7.0 watts per meter per kelvin; and a rack enclosed within the interior cavity and configured to support one or more spent nuclear fuel rods.
    Type: Grant
    Filed: March 6, 2013
    Date of Patent: August 2, 2016
    Assignee: NuScale Power, LLC
    Inventors: Jose N. Reyes, Jr., Christopher Colbert
  • Patent number: 9396824
    Abstract: A container system, for radioactive waste and method for using the same is provided. The system includes a canister configured for holding radioactive waste and a lid system. In one embodiment, the lid system comprises a two-part lid assembly including a confinement lid and a shielded lifting lid. The confinement lid is detachably mounted to the confinement lid. In use, the lifting lid supports die confinement lid for lifting and placement on the canister. The lifting lid further shields operators while the confinement lid is mounted to the canister. Thereafter, the lifting lid is removed and may be reused for confinement lid mountings on other canisters. In one embodiment, the confinement lid is bolted to the canister. The canister may be disposed in a protective overpack for transport and storage.
    Type: Grant
    Filed: April 15, 2013
    Date of Patent: July 19, 2016
    Inventor: Stephen J. Agace
  • Patent number: 9275765
    Abstract: A nuclear component transfer device that incorporates a shielded canister into the mast design of a conventional nuclear refueling machine. A moveable mast telescopes within a stationary mast which is attached to a bridge for lateral positioning. The canister allows for the addition of shielding that is positioned with the movement of the moveable mast without additional motorized components to deploy the shielding during nuclear component movement. The nuclear component is drawn up into the shielded canister as the moveable mast lifts the nuclear component. The nuclear component is then placed into a transfer cart that is also fitted with a shielded canister. The transfer is made without exposing the nuclear components resulting in completely shield movement.
    Type: Grant
    Filed: January 15, 2013
    Date of Patent: March 1, 2016
    Assignee: Westinghouse Electric Company LLC
    Inventor: Alexander W. Harkness
  • Patent number: 9275768
    Abstract: A container for a non-irradiated nuclear fuel assembly including a single casing for receiving at least one nuclear fuel assembly, the casing being formed from an elongate tubular shell, the shell including a metallic internal layer delimiting at least one individual housing for receiving a nuclear fuel assembly, and a metallic external layer surrounding the internal layer, the shell being filled between its internal layer and its external layer, and from lids for closing the or each housing at the longitudinal ends of the shell.
    Type: Grant
    Filed: December 22, 2008
    Date of Patent: March 1, 2016
    Assignee: AREVA NP
    Inventors: Pierre Wegeler, Jacques Gauthier
  • Patent number: 9269464
    Abstract: An apparatus, system and method for storing high level radioactive waste. In one aspect, the invention is a specially designed ring structure for providing neutron and gamma radiation shielding for high level radioactive materials that produce residual heat. A plurality of the ring structures may be arranged in a stacked assembly that completely surrounds an internal containment boundary. Collars may be provided at the ring-to-ring interfaces. The ring structures may have voids which are configured for receiving neutron absorbing material that completely surrounds the containment boundary.
    Type: Grant
    Filed: April 29, 2014
    Date of Patent: February 23, 2016
    Inventors: Stephen J. Agace, Krishna P. Singh
  • Patent number: 9208914
    Abstract: A system, method and apparatus for providing radiation shielding to a ventilated cask for holding high level radioactive materials. In one aspect, the tubular shell is positioned to circumferentially surround the cask so that an annular gap exists between the tubular shell and a sidewall of the cask. The tubular shell includes a first air flow inlet and a second air flow inlet. An air flow barrier is placed within the annular gap, separating the annular gap into a first chamber and a second chamber. A first air flow into the first air flow inlet passes through the first chamber and into the inlet vent of the cask, a second air flow into the second air flow inlet passes through the second chamber and to an opening at the top end of the tubular shell, and the air flow barrier prohibits cross-flow of air between the first and second chambers.
    Type: Grant
    Filed: March 31, 2015
    Date of Patent: December 8, 2015
    Inventors: Krishna P. Singh, Stephen J. Agace, Stefan Anton
  • Patent number: 9022189
    Abstract: A cask cushioning body includes an end-surface side member (2) in which a plurality of plates (21, 22) made of steel are formed at a distance between plate surfaces of the plates (21, 22) that face each other, and in which the plate surfaces of the plates (21, 22) are arranged along an end surface (100a) of a cask (100), and a circumferential-surface side member (3) that forms a cylindrical body (31) made of steel, one end of which is connected to a periphery of the end-surface side member (2), and that is arranged along an end-portion outer-circumferential surface (100b), wherein an impact absorber (4) that absorbs an impact by deforming is provided outside of the end-surface side member (2) and the circumferential-surface side member (3).
    Type: Grant
    Filed: June 28, 2011
    Date of Patent: May 5, 2015
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Yuichi Saito, Junichi Kishimoto, Tadashi Kimura, Akio Kitada, Hiroki Tamaki
  • Patent number: 9001958
    Abstract: The present invention provides a system and method for reclaiming energy from the heat emanating from spent nuclear fuel contained within a canister-based dry storage system. The inventive system and method provides continuous passive cooling of the loaded canisters by utilizing the chimney-effect and reclaims the energy from the air that is heated by the canisters. The inventive system and method, in one embodiment, is particularly suited to store the canisters below-grade, thereby utilizing the natural radiation shielding properties of the sub-grade while still facilitating passive air cooling of the canisters. In another embodiment, the invention focuses on a special arrangement of the spent nuclear fuel within the canisters so that spent nuclear fuel that is hotter than that which is typically allowed to be withdrawn from the spent fuel pools can be used in a dry-storage environment, thereby increasing the amount energy that can be reclaimed.
    Type: Grant
    Filed: April 21, 2011
    Date of Patent: April 7, 2015
    Inventors: Krishna P. Singh, John D. Griffiths, Debabrata Mitra-Majumdar
  • Publication number: 20150092903
    Abstract: A container for storing intact control rod blades including a cask which has a substantially square elongated portion and axially opposed dual end closures, such that the substantially square elongated portion is capable of receiving a basket containing a plurality of control rod blades, where each of the control rod blades has a cruciform end and a velocity limiter end, so that the cruciform end of one control rod blade rests against the velocity limiter end of an adjacent control rod blade, and where the substantially square elongated portion of the cask is comprised of three layers, an inner layer, a middle layer and an outer layer, with the inner and outer layers made of ASTM A543 Steel.
    Type: Application
    Filed: September 30, 2013
    Publication date: April 2, 2015
    Applicant: WMG, Inc.
    Inventors: Peter Tuite, Kevin Tuite
  • Publication number: 20150092904
    Abstract: Systems and methods of transferring nuclear fuel from fuel pools having size and/or weight limitations to a storage or transport cask are disclosed. A canister containing spent nuclear fuel is inserted into a transfer cask. A shielding sleeve is then placed around the transfer cask. A lifting device simultaneously lifts the transfer cask and the shielding sleeve over a storage cask and the spent fuel is transferred from the transfer cask to the storage or transport cask.
    Type: Application
    Filed: October 2, 2014
    Publication date: April 2, 2015
    Inventors: George C. Carver, Juan C. Subiry, John T. Donahoe, Vadim Z. Shtylman
  • Patent number: 8995605
    Abstract: A lid frame for a nuclear fuel assembly shipping container and a shipping container for nuclear fuel assemblies are provided. The shipping container can include a lower container in which a cradle is installed, an upper container detachably coupled to the lower container, and a base frame coupled to the cradle with at least one nuclear fuel assembly placed thereon. The lid frame can include a plurality of supports installed apart from each other so as to surround the nuclear fuel assembly placed on the base frame, and a plurality of clamps separated from each other, coupled to the plurality of supports perpendicular to the plurality of supports, rotatably hinged to the base frame, and configured to clamp the nuclear fuel assembly. The lid frame safely protects the nuclear fuel assembly that is being transported.
    Type: Grant
    Filed: December 27, 2010
    Date of Patent: March 31, 2015
    Assignee: Kepco Nuclear Fuel Co., Ltd.
    Inventors: Hung Soon Chang, Chang Hwan Hwang, Deuk Yeon Kim, Jae Soon Choi, Weon Chan Hwang, Se Yong Shin, Young Hoon Kim, Jong Sung Hong
  • Patent number: 8995604
    Abstract: A system, method and apparatus for providing additional radiation shielding to a ventilated cask for holding high level radioactive materials. The invention utilizes a tubular shell that is ancillary to the ventilated cask that circumscribes the ventilated cask to add radiation shielding protection while improving heat removal by natural convective air flow. Because the tubular shell and cask are non-unitary and slidably separable from one another, crane lifting capacity is not affected.
    Type: Grant
    Filed: November 5, 2010
    Date of Patent: March 31, 2015
    Inventors: Krishna P. Singh, Stephen J. Agace, Paul Stefan Anton
  • Publication number: 20150071398
    Abstract: A module for storing high level radioactive waste includes an outer shell, having a hermetically closed bottom end, and an inner shell forming a cavity and being positioned inside the outer shell to form a space therebetween. At least one divider extends from the top to the bottom of the inner shell to create a plurality of inlet passageways through the space, each inlet passageway connecting to a bottom portion of the cavity. A plurality of inlet ducts each connect at least one of the inlet passageways and ambient atmosphere, and each includes an inlet duct cover affixed atop a surrounding inlet wall, the inlet wall being peripherally perforated. A removable lid is positioned atop the inner shell and has at least one outlet passageway connecting the cavity and the ambient atmosphere, the lid and the top of the inner shell being configured to form a hermetic seal therebetween.
    Type: Application
    Filed: April 18, 2013
    Publication date: March 12, 2015
    Inventor: Krishna P. Singh
  • Patent number: 8958522
    Abstract: The present invention relates to a passive filtration system for a fuel handling area having a spent fuel pool in a nuclear reactor. The passive filtration system reduces a discharge into the atmosphere of particulates, such as radioactive particulates, generated in a spent fuel pool boiling event. The passive filtration system includes a discharge path, a vent mechanism positioned between the fuel handling area and the discharge path. The vent mechanism is structured to release a steam and air mixture from the fuel handling area to the discharge path. The steam and air mixture includes the particulates. The passive filtration system further includes an air filtration unit located in the discharge path and this unit has at least one passive filter. The steam and air mixture is forced through the at least one passive filter due to a differential pressure generated in the fuel handling area.
    Type: Grant
    Filed: June 2, 2011
    Date of Patent: February 17, 2015
    Assignee: Westinghouse Electric Company LLC
    Inventors: Gary L. Sedlacek, Luke G. Mulhollem, Michael A. Chvala, Justin D. Stirling
  • Patent number: 8953733
    Abstract: A method for joint configuration of nuclear power plant fuel includes the following steps: (S1) for at least one operating unit, based on an equilibrium cycle or transition cycle reactor core design, at least one new fuel element is added to at least one operating unit; (S2) after running a combustion cycle, and on basis of the new fuel elements in step (S1), more first spent fuel elements are obtained from the at least one operating unit than are obtained from the equilibrium cycle or transition cycle reactor core design, and said first spent fuel elements are kept in reserve; (S3) for at least one new starting unit, a scheduled number of new fuel elements, as well as the first spent fuel elements obtained for reserve in step (S2), are set in the first reactor cores of at least one new starting unit.
    Type: Grant
    Filed: May 21, 2010
    Date of Patent: February 10, 2015
    Assignees: China Nuclear Power Engineering Compay Ltd., China Nuclear Power Technology Research Institute, China Guangdong Nuclear Power Holding Corporation
    Inventor: Zirong Ma
  • Patent number: 8953734
    Abstract: The transition unit includes an outer cylinder that is cylindrically shaped and made of steel. A foundation for supporting the outer cylinder is provided. The foundation contains no metal reinforcements. Grounding rods are connected to the outer cylinder. The grounding rods extend to a water table. A lower support structure made preferably of wood is located within the outer cylinder. An inner cylinder is supported by the lower support structure. A canister is located within the inner cylinder. A cover is located on the outer cylinder for enclosing the transition unit.
    Type: Grant
    Filed: September 26, 2007
    Date of Patent: February 10, 2015
    Assignee: Endless Energy, LLC
    Inventors: Jerry B. Morof, Claire T. Brown, Marjorie T. Wyman
  • Patent number: 8929504
    Abstract: A canister apparatus, basket apparatus and combinations thereof for transporting and/or storing high level radioactive waste, such as spent nuclear fuel. In one embodiment, the invention can be a basket apparatus for supporting a plurality of spent nuclear fuel rods within a containment structure, the basket apparatus comprising a plurality of disk-like grates, each disk-like grate having a plurality of cells formed by a gridwork of beams; and means for supporting the disk-like grates in a spaced arrangement with respect to one another and so that the cells of the disk-like grates are aligned.
    Type: Grant
    Filed: March 13, 2012
    Date of Patent: January 6, 2015
    Inventors: Krishna P. Singh, Stephen J. Agace
  • Patent number: 8917809
    Abstract: The present invention is directed to a new manufacturing process for a FRP honeycomb structure where the honeycomb core assembly is arranged parallel to the surface. The honeycomb core is made from FRP prepreg with double structural walls and is manufactured by stiffening using heat and pressure. In a honeycomb core assembly set tank, a plurality of internal tanks are gathered in honeycomb core assembly. An internal tank FRP wall maintains the pressure of the internal tank, while an external FRP wall, heat foamed plastic resin and rigid FRP hull of set tank endure the external shock loading. A honeycomb core structure of six-corner cell can be infinitely arranged, and its structural position is unique. A set tank in which a plurality of internal tanks are gathered into a honeycomb core assembly can be arranged in infinite combinations, such that the total capacity can be extremely large.
    Type: Grant
    Filed: February 28, 2012
    Date of Patent: December 23, 2014
    Inventor: Tsukasa Nozawa