Shield Or Barrier Between Radiation Or Heat Source And Object To Be Protected (e.g., Insulation, Thermal Shield) Patents (Class 376/287)
  • Patent number: 10636529
    Abstract: A nuclear reactor module includes a reactor core and a reactor housing that surrounds the reactor core about its sides, wherein the reactor housing is configured to direct coolant through the reactor core. A neutron reflector is located between the reactor core and the reactor housing, wherein the neutron reflector has a plurality of inlet ports facing the reactor core. The neutron reflector also has a plurality of outlet ports fluidly connected to the inlet ports to direct a portion of the coolant through the neutron reflector.
    Type: Grant
    Filed: May 20, 2013
    Date of Patent: April 28, 2020
    Assignee: NUSCALE POWER, LLC
    Inventor: Eric Paul Young
  • Patent number: 9431138
    Abstract: A method for producing uniform activity targets according to an embodiment of the invention may include arranging a plurality of targets in a holding device having an array of compartments, each target being assigned to a compartment based on a known flux of a reactor core so as to facilitate an appropriate exposure of the targets to the flux based on target placement within the array of compartments. The holding device may be positioned within the reactor core to irradiate the targets. The method may be used to produce brachytherapy and/or radiography targets (e.g., seeds, wafers) in a reactor core such that the targets have relatively uniform activity.
    Type: Grant
    Filed: July 10, 2009
    Date of Patent: August 30, 2016
    Assignee: GE-Hitachi Nuclear Energy Americas, LLC
    Inventors: Melissa Allen, William Earl Russell, II
  • Patent number: 9025721
    Abstract: There is provided a holding device which can hold a molten corium for a predetermined period even when the molten corium is exposed to heat or undergoes any chemical reaction and which is applicable to practical use. There is provided a holding device provided below a nuclear reactor pressure vessel for holding a molten corium, wherein the holding device includes a base material in contact with a cooling medium, and a multilayer stack structure on the base material. The multilayer stack structure has a first layer having heat-resistant property, a second layer formed on the first layer and having heat-resistant property with lower heat conductivity than that of the first layer, and a third layer formed on the second layer and having corrosion-resistant property and impact-absorbing property.
    Type: Grant
    Filed: September 14, 2012
    Date of Patent: May 5, 2015
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Kunihiko Wada, Fumiyo Kuno, Yutaka Ishiwata, Tsuneji Kameda, Ryoichi Hamazaki, Noriyuki Katagiri
  • Patent number: 8873695
    Abstract: Internal head vents are usable in nuclear reactors and include piping inside of the reactor pressure vessel with a vent in the reactor upper head. Piping extends downward from the upper head and passes outside of the reactor to permit the gas to escape or be forcibly vented outside of the reactor without external piping on the upper head. The piping may include upper and lowers section that removably mate where the upper head joins to the reactor pressure vessel. The removable mating may include a compressible bellows and corresponding funnel. The piping is fabricated of nuclear-reactor-safe materials, including carbon steel, stainless steel, and/or a Ni—Cr—Fe alloy. Methods install an internal head vent in a nuclear reactor by securing piping to an internal surface of an upper head of the nuclear reactor and/or securing piping to an internal surface of a reactor pressure vessel.
    Type: Grant
    Filed: January 6, 2011
    Date of Patent: October 28, 2014
    Assignee: GE-Hitachi Nuclear Energy Americas LLC
    Inventors: John L. Gels, David J. Keck, Gerald A. Deaver
  • Patent number: 8867690
    Abstract: A nuclear reactor includes a pressure vessel and a nuclear reactor core disposed in the pressure vessel. A subterranean containment structure contains the nuclear reactor. An ultimate heat sink (UHS) pool is disposed at grade level, and an upper portion of the subterranean containment structure defines at least a portion of the bottom of the UHS pool. In some embodiments, the upper portion of the subterranean containment structure comprises an upper dome, which may protrude above the surface of the UHS pool to define an island surrounded by the UHS pool. In some embodiments, a condenser comprising a heat exchanger including hot and cold flow paths is disposed inside the subterranean containment structure; and cooling water lines operatively connect the condenser with the UHS pool.
    Type: Grant
    Filed: August 25, 2011
    Date of Patent: October 21, 2014
    Assignee: Babcock & Wilcox mPower, Inc.
    Inventors: Ronald C. Watson, John D. Malloy, Michael J. Edwards
  • Patent number: 8837665
    Abstract: Heat from an ex-vessel mass of core material is removed to cooler regions of a containment envelope via liquid and/or vapor phase transport. Various aspects provide for contacting the ex-vessel core material with a material having properties including melting point, boiling point, and condensation kinetics such that condensation of the material in cooler regions of the containment envelope is at least as fast as evaporation of the material due to heat absorption from the core material and associated species.
    Type: Grant
    Filed: July 19, 2008
    Date of Patent: September 16, 2014
    Inventor: Charles E. Ramberg
  • Publication number: 20140254739
    Abstract: A head module for a large-scale container, a large-scale container having the head module, and methods for manufacturing the head module and the large-scale container. The method for manufacturing a head module comprises providing a head having an annular opening, the head being composed of a plurality of petals, providing a plurality of cylinder plates, and forming a head cylindrical ring, connecting in order the plurality of cylinder plates to the end surface of the annular opening and joining facing sides of all adjacent cylinder plates. Based on the unfitness of the petals at the annular opening of the head, gaps between adjacent cylinder plates may be adjusted, and/or the positions of the cylinder plates on the end surface of the annular opening of the head may be adjusted radially inwards or outwards.
    Type: Application
    Filed: April 9, 2014
    Publication date: September 11, 2014
    Applicants: State Nuclear Power Technology Corporation Ltd., Shandong Nuclear Power Equipment Manufacturing Co. Ltd.
    Inventors: Jun Li, Guobiao Wang, Zhongwei Yang, Guizhen Yan, Jin Han
  • Patent number: 8811565
    Abstract: An integrated reactor missile shield and crane assembly (IRMSCA) is disclosed and claimed. The IRMSCA replaces the existing concrete missile shields and reactor services crane. The IRMSCA is moveable such that the missile shield can be moved away from the reactor head, allowing the integral crane to lift the control rod drive mechanism components and other routine loads at the refueling cavity.
    Type: Grant
    Filed: July 26, 2011
    Date of Patent: August 19, 2014
    Assignee: Areva Inc.
    Inventors: Harish Kamath, James R. Harris, Jr., Ravi Baliga
  • Patent number: 8787516
    Abstract: An apparatus is provided and includes a reactor core, a boom and a shield assembly supportively interposed between the reactor core and the boom, a heat pipe disposed in thermal communication with the reactor core, a thermoelectric power converter operably coupled to the heat pipe, struts supportively coupled to the heat pipe at opposite ends of the power converter and hinge joints to rotatably couple the struts to the boom, at least one of the hinge joints being spring-loaded.
    Type: Grant
    Filed: May 5, 2011
    Date of Patent: July 22, 2014
    Assignee: Aerojet Rocketdyne of DE, Inc.
    Inventors: Cheng-Yi Lu, William Determan
  • Patent number: 8712002
    Abstract: In a nuclear reactor building of a steel plate concrete structure that houses a pressure containment vessel formed with a plurality of penetration ports penetrating the pressure containment vessel on the periphery thereof and includes a biological shielding wall disposed outside the pressure containment vessel. The pressure containment vessel is vertically divided into a plurality of blocks so that each of the blocks has one or more pressure containment vessel penetration ports arranged on a same horizontal plane, and the reactor building including the biological shielding wall is divided into a plurality of modules by the horizontal plane.
    Type: Grant
    Filed: January 6, 2010
    Date of Patent: April 29, 2014
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Shigeki Yokoyama, Makoto Ukai, Munetaka Takahashi, Hideo Hirai, Takuya Miyagawa, Masashi Tanabe
  • Patent number: 8681924
    Abstract: A neutron absorbing insert for use in a fuel rack and method of manufacturing the same. In ones aspect, the invention is a neutron absorbing apparatus comprising: 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.
    Type: Grant
    Filed: December 23, 2009
    Date of Patent: March 25, 2014
    Inventors: Evan Rosenbaum, Thomas G. Haynes, III, Krishna P. Singh
  • Patent number: 8681923
    Abstract: The present invention provides a method of manufacturing a core shroud for a nuclear plant and a nuclear power plant structure in which a groove portion is easily assembled in the case of manufacturing the core shroud having a weld structure of a nuclear power plant by a laser welding, and it is possible to obtain a weld joint portion in which a plastic distortion region and a residual stress are as small as possible, going with a solidification shrinkage of the weld portion. At a time of welding butted portions of a plurality of members constructing a core shroud, a root face is provided in the butted portion, a length of the root face is set to 25% to 95% of a thickness of the thinner one of the butted portions of a plurality of members, a narrow groove is provided in the other than the root face, and the butted portions are welded by a laser welding using a weld wire.
    Type: Grant
    Filed: December 23, 2009
    Date of Patent: March 25, 2014
    Assignee: Hitachi, Ltd.
    Inventors: Eiji Ashida, Xudong Zhang, Shoh Tarasawa, Masaya Okada, Yusuke Anma
  • Patent number: 8670518
    Abstract: Disclosed herein is a fully passive decay heat removal system utilizing a partially immersed heat exchanger, the system comprising: a hot pool; an intermediate heat exchanger which heat-exchanges with the sodium of the hot pool; a cold pool; a support barrel extending vertically through the boundary between the hot pool and the cold pool; a sodium-sodium decay heat exchanger received in the support barrel; a sodium-air heat exchanger provided at a position higher than the sodium-sodium decay heat exchanger; an intermediate sodium loop connecting the sodium-sodium decay heat exchanger with the sodium-air heat exchanger; and a primary pump, wherein a portion of the effective heat transfer tube of the sodium-sodium decay heat exchanger is immersed in the cold pool, particularly in a normal operating state, and the surface of the lower end of a shroud for the sodium-sodium decay heat exchanger, the lower end being immersed in the sodium of the cold pool, has perforated holes.
    Type: Grant
    Filed: October 2, 2009
    Date of Patent: March 11, 2014
    Assignees: Korea Atomic Energy Research Institute, Korea Hydro and Nuclear Power Co., Ltd.
    Inventors: Jae-Hyuk Eoh, Tae-Ho Lee, Ji-Woong Han, Seong-O Kim
  • Patent number: 8637842
    Abstract: A method of using automatic whole body personnel contamination monitors and/or means for decontaminating individuals exposed to radioactive material contamination is provided. The inventive method involves the use of these monitors and/or decontamination means in intermodal containers of mobile-unit structures dedicated to responding to radiological emergency situations. Also provided are such mobile-unit structures, as well as systems that employ such mobile-unit structures.
    Type: Grant
    Filed: March 22, 2012
    Date of Patent: January 28, 2014
    Assignee: UniTech Services Group, Inc.
    Inventors: Leslie B. Case, III, Michael R. Fuller, Gregg A. Johnstone, Thomas Pearce O'Kelley, Glenn E. Roberts
  • Patent number: 8588360
    Abstract: A system includes a containment vessel configured to prohibit a release of a coolant, and a reactor vessel mounted inside the containment vessel. An outer surface of the reactor vessel is exposed to below atmospheric pressure, wherein substantially all gases are evacuated from within the containment vessel.
    Type: Grant
    Filed: March 4, 2009
    Date of Patent: November 19, 2013
    Assignee: The State of Oregon Acting by and Through the State Board of Higher Education on Behalf of Oregon State University
    Inventors: Jose N. Reyes, Jr., John T. Groome
  • Patent number: 8462910
    Abstract: A neutron reactor includes a neutron shield which is disposed outside a nuclear reactor core and adapted to absorb neutrons leaking from the core. The neutron shield includes a plurality of containers each of which contains a powdered neutron absorbing material and which are stacked with one another in a vertical direction, and a cladding tube which houses the containers. The neutron absorbing material is composed of B4C powder.
    Type: Grant
    Filed: July 13, 2009
    Date of Patent: June 11, 2013
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Takanari Inatomi, Toshiyuki Suzuki, Hiroshi Nakamura, Toshiro Sakai
  • Patent number: 8416911
    Abstract: A pressurized water reactor nuclear containment radiation shield which surrounds the upper portion of a pressure vessel in an ice condenser containment. The vertical walls of the neutron shield are formed in vertical sections with the lower and upper sections operable during outages, to open to promote air flow cooling along the walls in the vicinity of the vessel head.
    Type: Grant
    Filed: March 7, 2011
    Date of Patent: April 9, 2013
    Assignee: Westinghouse Electric Company LLC
    Inventors: Michael F. Hankinson, Larry C. Smith, Joseph A. Harim, John E. Bible, Jianwei Chen
  • Patent number: 8411813
    Abstract: A method for carrying out a reactor internal, comprising steps of: forming a first opening portion in a ceiling of a reactor building at a position directly above an equipment pool in said reactor building; cutting a cylindrical reactor internal surrounding a core in a reactor pressure vessel disposed in said reactor building, at one position in an axial direction; surrounding said cut cylindrical reactor internal with a radiation shield; and carrying out said cylindrical reactor internal surrounded by said radiation shield out of said reactor building through said first opening portion.
    Type: Grant
    Filed: June 30, 2009
    Date of Patent: April 2, 2013
    Assignee: Hitachi-GE Nuclear Energy, Ltd.
    Inventor: Masataka Aoki
  • Patent number: 8401142
    Abstract: The reactor vessel of a nuclear reactor installation which is suspended from the cold leg nozzles in a reactor cavity is provided with a lower thermal insulating barrier spaced from the reactor vessel that has a hemispherical lower section that increases in volume from the center line of the reactor to the outer extent of the diameter of the thermal insulating barrier and smoothly transitions up the side walls of the vessel. The space between the thermal insulating harrier and the reactor vessel forms a chamber which can be flooded with cooling water through passive valving to directly cool the reactor vessel in the event of a severe accident. The passive inlet valve for the cooling water includes a buoyant door that is normally maintained sealed under its own weight and floats open when the cavity is Hooded. Passively opening steam vents are also provided.
    Type: Grant
    Filed: May 3, 2007
    Date of Patent: March 19, 2013
    Assignee: Westinghouse Electric Company LLC
    Inventors: C. Patrick Keegan, James H. Scobel, Richard F. Wright
  • Publication number: 20120328067
    Abstract: An embodiment of a nuclear power plant has: a reactor vessel containing a core; a reactor containment vessel containing the reactor vessel; and a radiation heat reflecting member disposed at a portion below the reactor vessel inside the reactor containment vessel. The radiation heat reflecting member may block radiation heat, which is emitted toward a side wall surface of the reactor containment vessel from the core that has been put in a molten state by an accident and flowed downward from the reactor vessel to be accumulated at a lower portion of the reactor containment vessel. The radiation heat reflecting member may block radiation heat, which is emitted toward a supporting structure supporting devices disposed inside the reactor containment vessel.
    Type: Application
    Filed: May 23, 2012
    Publication date: December 27, 2012
    Inventors: Tomohisa KURITA, Mika Tahara, Mitsuo Komuro, Toshimi Tobimatsu, Ryo Suzuki, Ryoichi Hamazaki, Noriyuki Katagiri, Masashi Tanabe
  • Publication number: 20120281803
    Abstract: A multi-layered material composite is disclosed suitable for nuclear reactor applications to protect equipment from radiation damage. In one embodiment, the composite includes an internal neutron-absorbing layer and an external layer disposed on opposing sides of the internal layer. The external layers are made of metal or ceramic in various embodiments. The composite is disposed on or at least proximate to the an equipment component within the containment chamber of a nuclear reactor in some embodiments to protect the component from radiation damage.
    Type: Application
    Filed: May 4, 2012
    Publication date: November 8, 2012
    Applicant: GIP International, LTD
    Inventors: David P. Reichwein, Keith A. Pocock
  • Publication number: 20120148011
    Abstract: A pressurized water reactor nuclear containment radiation shield which surrounds the upper portion of a pressure vessel in an ice condenser containment. The vertical walls of the neutron shield are formed in vertical sections with the lower and upper sections operable during outages, to open to promote air flow cooling along the walls in the vicinity of the vessel head.
    Type: Application
    Filed: March 7, 2011
    Publication date: June 14, 2012
    Applicant: WESTINGHOUSE ELECTRIC COMPANY LLC.
    Inventors: Michael F. Hankinson, Larry C. Smith, Joseph A. Harim, John E. Bible, Jianwei Chen
  • Publication number: 20120099694
    Abstract: A fast reactor 1 includes: a reactor vessel 7 accommodating therein a core 2 and a primary coolant 21; a core support 13 supporting the core 2 from below; and a bulkhead 6 disposed on the core support 13, the bulkhead 6 extending upward and surrounding the core 2 from a lateral side. Between an inner surface of the reactor vessel 7 and the bulkhead 6, there is disposed an intermediate heat exchanger 15 configured to cool the primary coolant 21, and an electromagnetic pump 14 configured to pressurize the cooled primary coolant 21. A neutron shield 8 supported by an upper supporting plate 29 from above is disposed below the electromagnetic pump 14. The upper supporting plate 29 has an opening 29a. Between an outlet 14b of the electromagnetic pump 14 and the upper supporting plate 29, there is disposed a coolant guide mechanism 17 configured to guide the pressurized primary coolant 21 from the electromagnetic pump 14 to the neutron shield through the opening 29a of the upper supporting plate 29.
    Type: Application
    Filed: April 27, 2010
    Publication date: April 26, 2012
    Inventors: Takanari Inatomi, Ayano Ebihara, Hiroshi Nakamura, Hideo Kobayashi, Katsushi Hasegawa
  • Patent number: 8064564
    Abstract: In a nuclear reactor neutron panels varying in thickness in the circumferential direction are disposed at spaced circumferential locations around the reactor core so that the greatest radial thickness is at the point of highest fluence with lesser thicknesses at adjacent locations where the fluence level is lower. The neutron panels are disposed between the core barrel and the interior of the reactor vessel to maintain radiation exposure to the vessel within acceptable limits.
    Type: Grant
    Filed: November 21, 2008
    Date of Patent: November 22, 2011
    Assignee: Westinghouse Electric Company LLC
    Inventor: Norman R. Singleton
  • Patent number: 8036335
    Abstract: In a reactor vessel thermal load reducing system near the surface level of a coolant, the present invention is characterized in that a heat conductive member is installed not contacting the reactor vessel wall in an area above and below the coolant liquid surface, and the heat conducting member is attached to a guard vessel, the heat conducting member being made of material of good heat conductivity.
    Type: Grant
    Filed: June 4, 2007
    Date of Patent: October 11, 2011
    Assignee: Japan Nuclear Cycle Development Institute
    Inventors: Naoto Kasahara, Masanori Ando
  • Publication number: 20100329406
    Abstract: An isotope production system that includes a cyclotron having a magnet yoke that surrounds an acceleration chamber. The cyclotron is configured to direct a particle beam from the acceleration chamber through the magnet yoke. The isotope production system also includes a target system that is located proximate to the magnet yoke. The target system is configured to hold a target material and includes a radiation shield that extends between the magnet yoke and the target location. The radiation shield is sized and shaped to attenuate gamma rays emitted from the target material toward the magnet yoke. The isotope production system also includes a beam passage that extends from the acceleration chamber to the target location. The beam passage is at least partially formed by the magnet yoke and the radiation shield of the target system.
    Type: Application
    Filed: June 26, 2009
    Publication date: December 30, 2010
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: JONAS NORLING, TOMAS ERICKSSON
  • Patent number: 7781752
    Abstract: Transport and storage of nuclear fuel assemblies may require double confinement depending on the circumstances. A device and a method are described to perform this double conditioning without the need of a hot containment, and in which the loading and pre-positioning steps can take place in a pool. The device (10) includes a metallic inner leak tight conditioning receptacle (20) and a metallic outer leak tight receptacle (30). When the inner receptacle (20) is located in the outer receptacle (30), a passage (15, 25) remains free between the two receptacles, from the open end to the bottom of the outer receptacle. The outer receptacle (30) can be drained through this passage, particularly by a dip tube (33).
    Type: Grant
    Filed: October 28, 2004
    Date of Patent: August 24, 2010
    Assignee: Cogema Logistics
    Inventor: René Chiocca
  • Publication number: 20100183112
    Abstract: The present invention provides a method of manufacturing a core shroud for a nuclear plant and a nuclear power plant structure in which a groove portion is easily assembled in the case of manufacturing the core shroud having a weld structure of a nuclear power plant by a laser welding, and it is possible to obtain a weld joint portion in which a plastic distortion region and a residual stress are as small as possible, going with a solidification shrinkage of the weld portion. At a time of welding butted portions of a plurality of members constructing a core shroud, a root face is provided in the butted portion, a length of the root face is set to 25% to 95% of a thickness of the thinner one of the butted portions of a plurality of members, a narrow groove is provided in the other than the root face, and the butted portions are welded by a laser welding using a weld wire.
    Type: Application
    Filed: December 23, 2009
    Publication date: July 22, 2010
    Inventors: Eiji ASHIDA, Xudong Zhang, Shoh Tarasawa, Masaya Okada, Yusuke Anma
  • Publication number: 20100119030
    Abstract: An alignment system that employs jacking block assemblies and alignment posts around the periphery of the top plate of a nuclear reactor lower internals core shroud to align an upper core plate with the lower internals and the core shroud with the core barrel. The distal ends of the alignment posts are chamfered and are closely received within notches machined in the upper core plate at spaced locations around the outer circumference of the upper core plate. The jacking block assemblies are used to center the core shroud in the core barrel and the alignment posts assure the proper orientation of the upper core plate. The alignment posts may alternately be formed in the upper core plate and the notches may be formed in top plate.
    Type: Application
    Filed: September 1, 2009
    Publication date: May 13, 2010
    Applicant: Westinghouse Electric Company, LLC
    Inventors: CHARLES B. GILMORE, Norman R. Singleton
  • Patent number: 7684535
    Abstract: A reactor containment vessel of the present invention has a primary reactor containment vessel disposing a dry well for storing a reactor pressure vessel, a wet well for storing a pressure suppression pool, and an equipment room disposing below said pressure suppression pool inside thereof. Further, the primary reactor containment vessel includes an outer cylindrical wall reaching to a base mat from a top slab of the primary reactor containment vessel and facing the drywell, the pressure suppression pool and the equipment room respectively, an inner cylindrical wall facing the pressure suppression pool and the equipment room respectively, and a pressure suppression pool floor partitioning among the pressure suppression pool and the equipment room, and an outside portion of the outer cylindrical wall, an inside portion of the inner cylindrical wall, an outside portion of the ceiling and a lower portion of the pressure suppression pool floor are formed of a steel plate reinforced concrete respectively.
    Type: Grant
    Filed: February 28, 2007
    Date of Patent: March 23, 2010
    Assignee: Hitachi-GE Nuclear Energy, Ltd.
    Inventor: Shizuka Hirako
  • Patent number: 7649970
    Abstract: The tie rod repair apparatus includes a tie rod secured at its upper end to the shroud flange at the top of the shroud. The lower end of the tie rod passes through an opening in the shroud support plate without imposing a load on the plate. The lower end of the tie rod is anchored to the lower end of the core shroud support cylinder such that the compressive load path exerted by the tie rod to restrain the cracked shroud passes directly through the shroud support cylinder and the assembly of shroud cylinders bypassing the shroud support plate.
    Type: Grant
    Filed: August 4, 2005
    Date of Patent: January 19, 2010
    Assignee: General Electric Company
    Inventor: John Geddes Erbes
  • Publication number: 20100008463
    Abstract: A neutron reactor includes a neutron shield which is disposed outside a nuclear reactor core and adapted to absorb neutrons leaking from the core. The neutron shield includes a plurality of containers each of which contains a powdered neutron absorbing material and which are stacked with one another in a vertical direction, and a cladding tube which houses the containers. The neutron absorbing material is composed of B4C powder.
    Type: Application
    Filed: July 13, 2009
    Publication date: January 14, 2010
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Takanari Inatomi, Toshiyuki Suzuki, Hiroshi Nakamura, Toshiro Sakai
  • Publication number: 20090323883
    Abstract: A method for carrying out a reactor internal, comprising steps of: forming a first opening portion in a ceiling of a reactor building at a position directly above an equipment pool in said reactor building; cutting a cylindrical reactor internal surrounding a core in a reactor pressure vessel disposed in said reactor building, at one position in an axial direction; surrounding said cut cylindrical reactor internal with a radiation shield; and carrying out said cylindrical reactor internal surrounded by said radiation shield out of said reactor building through said first opening portion.
    Type: Application
    Filed: June 30, 2009
    Publication date: December 31, 2009
    Inventor: Masataka AOKI
  • Patent number: 7616728
    Abstract: An alignment system that employs jacking block assemblies and alignment posts around the periphery of the top plate of a nuclear reactor lower internals core shroud to align an upper core plate with the lower internals and the core shroud with the core barrel. The distal ends of the alignment posts are chamfered and are closely received within notches machined in the upper core plate at spaced locations around the outer circumference of the upper core plate. The jacking block assemblies are used to center the core shroud in the core barrel and the alignment posts assure the proper orientation of the upper core plate. The alignment posts may alternately be formed in the upper core plate and the notches may be formed in top plate.
    Type: Grant
    Filed: August 24, 2007
    Date of Patent: November 10, 2009
    Assignee: Westinghouse Electric Co. LLC
    Inventors: Charles B. Gilmore, Norman R. Singleton
  • Publication number: 20090232268
    Abstract: Illustrative embodiments provide modular nuclear fission deflagration wave reactors and methods for their operation. Illustrative embodiments and aspects include, without limitation, modular nuclear fission deflagration wave reactors, modular nuclear fission deflagration wave reactor modules, methods of operating a modular nuclear fission deflagration wave reactor, and the like.
    Type: Application
    Filed: May 12, 2008
    Publication date: September 17, 2009
    Inventors: Charles E. Ahlfeld, John Rogers Gilleland, Roderick A. Hyde, Muriel Y. Ishikawa, David G. McAlees, Nathan P. Myhrvold, Charles Whitmer, Lowell L. Wood, JR.
  • Publication number: 20090225920
    Abstract: Illustrative embodiments provide modular nuclear fission deflagration wave reactors and methods for their operation. Illustrative embodiments and aspects include, without limitation, modular nuclear fission deflagration wave reactors, modular nuclear fission deflagration wave reactor modules, methods of operating a modular nuclear fission deflagration wave reactor, and the like.
    Type: Application
    Filed: June 26, 2008
    Publication date: September 10, 2009
    Inventors: Charles E. Ahlfeld, John Rogers Gilleland, Roderick A. Hyde, Muriel Y. Ishikawa, David G. McAlees, Nathan P. Myhrvold, Charles Whitmer, Lowell L. Wood, JR.
  • Publication number: 20090213979
    Abstract: The invention relates to a nuclear power station comprising: at least one high temperature reactor; a storage installation (14) for fuel elements (5); means (32) for transferring the fuel elements (5) between the core (4) and the storage installation (14). According to the invention, the transfer means (32) comprise a tunnel (34) for transferring the fuel elements between the reactor core (4) and the storage installation (14).
    Type: Application
    Filed: December 8, 2008
    Publication date: August 27, 2009
    Applicant: AREVA NP
    Inventor: Christophe Frecon
  • Patent number: 7567645
    Abstract: A two-part integrated head assembly (100) is disclosed wherein the lower portion (110) attaches to, and is supported by, the reactor vessel closure head (90), and the upper portion (160) is fluidly connected to the lower portion, but is supported externally from the reactor vessel closure head. In the disclosed embodiment, the upper portion includes transverse support beams (170) that engage containment walls (92), for example steam generator walls, to support the upper portion. A duct (150) releasably connects a fan plenum (165) in the upper portion with an annular plenum in the lower portion, such that fans (166) can draw heated air from around the CEDMs (95). In one embodiment, a chiller (168) is provided in the fan plenum to cool the air prior to expelling it in containment. A missile shield (169) is also provided in the upper portion.
    Type: Grant
    Filed: May 22, 2006
    Date of Patent: July 28, 2009
    Assignee: Advent Engineering Services, Inc.
    Inventor: Ravi Baliga
  • Publication number: 20090080588
    Abstract: Illustrative embodiments provide nuclear fission igniters for nuclear fission reactors and methods for their operation. Illustrative embodiments and aspects include, without limitation, a nuclear fission igniter configured to ignite a nuclear fission deflagration wave in nuclear fission fuel material, a nuclear fission deflagration wave reactor with a nuclear fission igniter, a method of igniting a nuclear fission deflagration wave, and the like.
    Type: Application
    Filed: June 11, 2008
    Publication date: March 26, 2009
    Inventors: Charles E. Ahlfeld, John Rogers Gilleland, Roderick A. Hyde, Muriel Y. Ishikawa, David G. McAlees, Nathan P. Myhrvold, Charles Whitmer, Lowell L. Wood, JR.
  • Publication number: 20090060113
    Abstract: A nuclear reactor fuel bundle assembly including: a fuel bundle including an array of fuel rods and water rods mounted in an upper tie plate and housed in walls of a channel, and a pore type debris shield mounted at least partially in the channel, above or below the upper tie plate, the shield extending to or over the walls of the channel, whereby deflecting and/or capturing falling debris from entering the fuel assembly, wherein the shield is design to be durable, yet flexible, and porous.
    Type: Application
    Filed: August 31, 2007
    Publication date: March 5, 2009
    Applicant: Global Nuclear Fuel - Americas, LLC
    Inventors: Robert B. Elkins, Russell Fawcett, David Smith, Michael Kiernan, Russell Stachowski, Gerald A. Luciano, Michael S. DeFilippis, Carlton Clark, Richard Carl Longren
  • Publication number: 20090010376
    Abstract: The invention consists of placing adequate and useable shielding in the path of the radiation that exists when nuclear workers perform maintenance and inspection of the Pressure Water Reactor Steam Generator component at a nuclear electric generating plant. The shielding has an upper and a lower track member that permit the two shield panel halves to roll easily and be manipulated so that access and the associated work to be performed will result in significant reduction to the typical radiation dose that the workers receive during this work evolution when compared current shielding approach. The shielding includes rollers that roll on track members that are located above and below the man-way opening.
    Type: Application
    Filed: July 2, 2007
    Publication date: January 8, 2009
    Inventor: Earl Jacobson
  • Publication number: 20080187088
    Abstract: The invention places adequate and useable shielding in the path of the radiation that exists when nuclear workers perform maintenance and inspection of the Pressure Water Reactor Steam Generator component at a nuclear electric generating plant. The shielding has an upper and a lower track member that permit the two shield assembly halves to roll easily and be manipulated so that access and the associated work to be performed will result in significant reduction to the typical radiation dose that the nuclear workers receive during this work when compared with the current shielding approach. The shielding includes rollers that roll on track members that are located above and below the man-way opening.
    Type: Application
    Filed: July 31, 2007
    Publication date: August 7, 2008
    Inventor: Earl Jacobson
  • Publication number: 20080179551
    Abstract: A rear door system for transferring hot cell equipment into or out of a hot cell is disclosed. The rear door system of the present invention includes a rear door, which is provided to a rear wall of the hot cell so as to be movable to open or close the rear wall of the hot cell, and a vertical moving table, which is provided at a predetermined position on the lower portion of the front surface of the rear door so as to be movable upwards or downwards. The rear door system further includes a drive unit, which is provided at a predetermined position in the lower end of the rear door to move the rear door, and a stationary working table, which is disposed above the vertical moving table and is fixed in the hot cell in a horizontal orientation. The rear door system further includes a removable table, which is removably coupled at a predetermined position to the stationary working table, and a hot cell crane hook and a service area crane hook, which are respectively provided inside and outside the hot cell.
    Type: Application
    Filed: June 27, 2007
    Publication date: July 31, 2008
    Applicants: KOREA ATOMIC ENERGY RESEARCH INSTITUTE, KOREA HYDRO & NUCLEAR POWER CO., LTD.
    Inventors: Eun Pyo Lee, Gil Sung You, Ji Sup Yoon, Won Myung Choung, Jeong Hoe Ku, Il Je Cho, Dong Hak Kook, Kie Chan Kwon, Won Kyung Lee
  • Patent number: 7158605
    Abstract: A head assembly for a reactor pressure vessel includes a removable closure head, an array of control rod drive mechanisms, a seismic support platform, a missile shield assembly and a cooling system for drawing atmospheric air across electromagnetic coil stack assemblies. The cooling system includes: a lower shroud surrounding the coil stack assemblies with an end open to the atmosphere around the CRDMs; a plurality of extending internal ducts disposed within the array of CRDMs upwardly to an upper plenum disposed above the seismic support platform and a plurality of fan assemblies disposed on the upper plenum. The missile shield is disposed within the upper plenum. The cooling system effectively cools the coil stack assemblies during fuel cycles and does not hinder access to the CRDMs during an outage. The head assembly has lift legs for transporting either the entire head assembly as an integral unit or the structure above the seismic support platform a subassembly.
    Type: Grant
    Filed: September 24, 2003
    Date of Patent: January 2, 2007
    Assignee: Westinghouse Electric Co LLC
    Inventors: Alexander W. Harkness, Michael G. Ball, Gregory E. Gontis
  • Patent number: 7139359
    Abstract: An integrated head assembly (100) is disclosed for a nuclear reactor. The preferred integrated head assembly includes a lift assembly (150) that supports the reactor vessel closure head (90) and integrated head assembly for removal, a separate support structure (202) supported by a ring beam (151) that sets atop the reactor vessel closure head, a shroud assembly (200), a seismic support system (300), a baffle assembly (500), a missile shield (400), and a CRDM cooling system. The CRDM cooling system draws cooling air into the baffle assembly, downwardly past the CRDMs (96), outwardly to upright air ducts (600), upwardly to an upper plenum (680), and out of the assembly through the air fans (190). In a second embodiment the integrated head assembly (1100) includes a missile shield (1400) and CRDM cooling system (1600) that permits access to individual CRDMs from above.
    Type: Grant
    Filed: November 2, 2004
    Date of Patent: November 21, 2006
    Assignee: Advent Engineering Services, Inc.
    Inventors: Ravi Baliga, Key Y. Choi
  • Patent number: 6643349
    Abstract: In order to carry out a radioactivated reactor pressure vessel from a nuclear reactor building of a nuclear power plant, a first opening portion for carrying out the reactor pressure vessel is provided in a roof of the nuclear reactor building. A radiation shield for covering the reactor pressure vessel and shielding radiations is carried into the reactor building through the first opening portion, and installed on a reactor shield wall. A hanger is lowered through the first opening portion and a slit provided on an upper lid of the radiation shield. A portion of a lid of the reactor pressure vessel and a portion of the upper lid of the radiation shield are abutted by hanging up the reactor pressure vessel by the hanger.
    Type: Grant
    Filed: August 1, 2002
    Date of Patent: November 4, 2003
    Assignees: Hesco Technology Co., Ltd., ICC Co., Ltd.
    Inventors: Masataka Aoki, Norihito Saito, Takahiro Adachi
  • Patent number: 6639236
    Abstract: A shielded rack loader makes use of a loading rack movable between a shielding structure and a storage tube. A shield plug seals the storage tube. A hoist moves the shield plug and the loading rack. A shield plug cart and a material transfer cart mate with receiving flanges of the rack loader and permit temporary storage and movement of the shield plug and of canisters of transuranic material.
    Type: Grant
    Filed: February 28, 2002
    Date of Patent: October 28, 2003
    Assignee: The Secretary of State for Defence
    Inventors: Colin Mark Low, Graham John Erskine, Roy Paul Awbery, Martyn Charles Allen
  • Publication number: 20030174802
    Abstract: A moulded shield for a source of gamma-rays said shield defining a cavity to receive said source and comprising a core layer of cured liquid silicone resin loaded with particulate gamma radiation-shielding material adapted to surround a radiation source located in said cavity, said core layer being located between two outer layers of solid polymeric material. Also a method of forming a tubular shield.
    Type: Application
    Filed: October 23, 1997
    Publication date: September 18, 2003
    Inventor: JOHN THOMAS HARE
  • Patent number: 6618460
    Abstract: An integrated head assembly (100) is disclosed for a nuclear reactor. The preferred integrated head assembly includes a lift assembly (150) that supports the reactor vessel closure head (90) and integrated head assembly for removal, a separate support structure (202) supported by a ring beam (151) that sits atop the reactor vessel closure head, a shroud assembly (200), a seismic support system (300), a baffle assembly (500), a missile shield (400), and a CRDM cooling system. The CRDM cooling system draws cooling air into the baffle assembly, downwardly past the CRDMs (96), outwardly to upright air ducts (600), upwardly to an upper plenum (680), and out of the assembly through the air fans (190).
    Type: Grant
    Filed: September 25, 2002
    Date of Patent: September 9, 2003
    Assignee: Advent Engineering Services, Inc.
    Inventors: Ravi Baliga, Key Y. Choi
  • Patent number: 6594333
    Abstract: The present invention is used to reduce thermal load itself, being the cause to generate stress, which develops near liquid surface in a nuclear reactor wall and to contribute to further improvement of safety. A partition member (5) is arranged above a coolant liquid surface (9) in an annulus space (3) between a reactor vessel (1) and a guard vessel (2), a low-temperature gas is circulated through the annulus space above the partition member to cool down, the gas is circulated through the annulus space from under the coolant liquid surface to the partition member, and the high-temperature gas heated under the coolant liquid surface is used to raise the temperature above the coolant liquid surface.
    Type: Grant
    Filed: April 5, 2002
    Date of Patent: July 15, 2003
    Assignee: Japan Nuclear Cycle Development Institute
    Inventors: Naoto Kasahara, Masanori Ando