Zirconium(zr) Or Zirconium Base Alloy Patents (Class 148/672)
  • Patent number: 10446276
    Abstract: A method for making a fuel rod cladding tube and a cladding tube are described. The method includes wrapping ceramic fibers, for example, SiC fibers in a SiC matrix, around a tube formed from a metal alloy, such as a zirconium alloy. The interstices of the SiC wrappings on the tube are at least partially filled with SiC nano-sized particles. The surface of the filled tube is exposed by atomic layer deposition, at temperatures ranging from 25° C. to 600° C., to at least one cycle of alternating, non-overlapping pulses of gaseous precursors containing carbon and silicon to form a SiC monolayer. The step of filling the interstices of the SiC wrappings on the tube with SiC nano-sized particles fills large voids in the SiC wrapping. The step of exposing the surface of the particle filled SiC windings to at least one cycle of gaseous pulses fills small voids in the SiC wrapping.
    Type: Grant
    Filed: June 21, 2016
    Date of Patent: October 15, 2019
    Assignee: Westinghouse Electric Company LLC
    Inventors: Edward J. Lahoda, Peng Xu
  • Patent number: 9725791
    Abstract: Articles, such as tubing or strips, which have excellent corrosion resistance to water or steam at elevated temperatures, are produced from alloys having 0.2 to 1.5 weight percent niobium, 0.01 to 0.6 weight percent iron, and optionally additional alloy elements selected from the group consisting of tin, chromium, copper, vanadium, and nickel with the balance at least 97 weight percent zirconium, including impurities, where a necessary final heat treatment includes one of i) a SRA or PRXA (15-20% RXA) final heat treatment, or ii) a PRXA (80-95% RXA) or RXA final heat treatment.
    Type: Grant
    Filed: June 22, 2015
    Date of Patent: August 8, 2017
    Assignee: Westinghouse Electric Company LLC
    Inventors: John P. Foster, Robert J. Comstock, Andrew Atwood, Guirong Pan, Anand Garde, Mats Dahlback, Jonna Partezana Mundorff, Andrew J. Mueller
  • Patent number: 9694258
    Abstract: Described is a golf club with an outer surface comprising a low-friction ceramic material with suitable thickness and configuration. In one aspect, at least the striking surface and/or sole of a golf-club head is made of a low-friction material including at least one of: titanium nitride, titanium carbonitride, titanium oxynitride, titanium carbide, titanium aluminum nitride, aluminum titanium nitride, titanium silicon nitride, titanium niobium nitride, titanium zirconium nitride, silicon nitride, aluminum oxide, zirconium oxide, silicon oxide, zirconium nitride, chromium nitride, chromium carbonitride, chromium aluminum nitride, aluminum chromium nitride, titanium aluminum silicon nitride, and one or more combinations thereof.
    Type: Grant
    Filed: August 22, 2016
    Date of Patent: July 4, 2017
    Assignee: RGP INNOVATIONS, LLC
    Inventors: Jonathan P. Garino, Robert A. Ruggiero, Sr.
  • Patent number: 9523143
    Abstract: Described are articles having, at least, an outer surface comprising unalloyed oxidized Zirconium with Niobium having a thickness and configurations suitable for sports equipment, golf clubs, aircraft, boat hulls, motor vehicle, propellers, helicopter rotors, and various other non-medical applications.
    Type: Grant
    Filed: July 31, 2016
    Date of Patent: December 20, 2016
    Assignee: RGP INNOVATIONS, LLC
    Inventors: Jonathan P. Garino, Robert A. Ruggiero, Sr.
  • Patent number: 9422198
    Abstract: Described are articles having, at least, an outer surface comprising unalloyed oxidized Zirconium with Niobium having a thickness and configurations suitable for sports equipment, golf clubs, aircraft, boat hulls, motor vehicle, propellers, helicopter rotors, and various other non-medical applications.
    Type: Grant
    Filed: April 6, 2015
    Date of Patent: August 23, 2016
    Assignee: RGPInnovations, LLC
    Inventors: Jonathan P. Garino, Robert A. Ruggiero, Sr.
  • Patent number: 9169527
    Abstract: A treatment of a heater tube intended to be used in a pressurizer of the primary cooling system of a nuclear reactor. In particular, the heater tube comprises a heater housed in a substantially cylindrical sheath. The material of which this sheath is made is a work-hardened austenitic stainless steel. In particular, the external surface of the sheath is liable to undergo a stress corrosion during use of the heatertube. The method includes a heat treatment step, preferably using induction heating, in which the external surface of the sheath is heat-treated so as to recrystallize the material of the sheath at least on the surface thereof.
    Type: Grant
    Filed: April 6, 2011
    Date of Patent: October 27, 2015
    Assignee: Electricite de France
    Inventors: Jacques Champredonde, Jean-Marie Fageon, Yves Neau
  • Publication number: 20150107721
    Abstract: Methods of preparing a surface of a cast zirconium alloy substrate for oxidation, the method including hot isostatic pressing a cast substrate of near shape dimensions, heating the cast substrate, machining the cast substrate to desired shape dimensions, and treating the surface of the cast substrate to accept an oxide layer. in some examples, treating the surface of the cast substrate may include polishing the surface, peening the polished surface, and finishing the peened surface. Additional or alternative examples may include heat treating a cast substrate of near shape dimensions to define a homogenized grain structure within the cast substrate, machining the heat treated cast substrate to desired shape dimensions, and surface treating the machined cast substrate to modify its structure to define a recrystallized modified grain structure defining a reduced grain boundary size.
    Type: Application
    Filed: October 23, 2013
    Publication date: April 23, 2015
    Inventor: David L. Walker
  • Publication number: 20140130946
    Abstract: Methods for producing alloy strips that demonstrate improved formability are disclosed. The strips have a crystalline microstructure suitable for improved formability in the manufacture of various articles such as panels for plate heat exchangers and high performance tower packing components.
    Type: Application
    Filed: January 22, 2014
    Publication date: May 15, 2014
    Applicant: ATI PROPERTIES, INC.
    Inventor: Craig M. Eucken
  • Patent number: 8721810
    Abstract: Illustrative embodiments provide systems, methods, apparatuses, and applications related to annealing nuclear fission reactor materials.
    Type: Grant
    Filed: November 3, 2008
    Date of Patent: May 13, 2014
    Assignee: The Invention Science Fund I, LLC
    Inventors: Charles E. Ahlfeld, John Rogers Gilleland, Roderick A. Hyde, David G. McAlees, Jon David McWhirter, Ashok Odedra, Clarence T. Tegreene, Joshua C. Walter, Kevan D. Weaver, Charles Whitmer, Lowell L. Wood, Jr., George B. Zimmerman
  • Patent number: 8668786
    Abstract: Formed alloy strips including zirconium alloy strips that demonstrate improved formability are disclosed. The strips of the present disclosure have a purity and crystalline microstructure suitable for improved formability, for example, in the manufacture of certain articles such as panels for plate exchangers and high performance tower packing components.
    Type: Grant
    Filed: July 16, 2012
    Date of Patent: March 11, 2014
    Assignee: ATI Properties, Inc.
    Inventor: Craig M. Eucken
  • Patent number: 8647701
    Abstract: Methods of making surface hardened medical implants comprising providing a biocompatible alloy with a surface comprising an oxide or nitride layer, diffusing at least a portion of the respective oxygen or nitrogen from the oxide or nitride layer the substrate for a period of time to form a diffusion hardened zone of desired thickness. The period of time is based at least on (1) the diffusivity of a diffusing specie in the oxide or nitride layer, (2) a desired hardness profile of at least a portion of said implant defined by a function selected from the group consisting of: an error function, an exponential function, a near uniform distribution function, and any sequential combination thereof, or (3) a desired thickness of said oxide or nitride layer to be retained.
    Type: Grant
    Filed: June 27, 2011
    Date of Patent: February 11, 2014
    Assignee: Smith & Nephew, Inc.
    Inventors: Vivek Pawar, Shilesh C. Jani, Carolyn Weaver
  • Patent number: 8613818
    Abstract: Methods of refining the grain size of titanium and titanium alloys include thermally managed high strain rate multi-axis forging. A high strain rate adiabatically heats an internal region of the workpiece during forging, and a thermal management system is used to heat an external surface region to the workpiece forging temperature, while the internal region is allowed to cool to the workpiece forging temperature. A further method includes multiple upset and draw forging titanium or a titanium alloy using a strain rate less than is used in conventional open die forging of titanium and titanium alloys. Incremental workpiece rotation and draw forging causes severe plastic deformation and grain refinement in the titanium or titanium alloy forging.
    Type: Grant
    Filed: September 15, 2010
    Date of Patent: December 24, 2013
    Assignee: ATI Properties, Inc.
    Inventors: Robin M. Forbes Jones, John V. Mantione, Urban J. De Souza, Jean-Philippe Thomas, Ramesh S. Minisandram, Richard L. Kennedy, R. Mark Davis
  • Patent number: 8479549
    Abstract: A method of producing a seamless, tubular product includes centrifugally casting a corrosion resistant alloy into a tubular workpiece having an inner diameter and an outer diameter. The method then removes material from the inner diameter of the workpiece and subjects the workpiece to at least about a 25% wall reduction at a temperature below a recrystallization temperature of the workpiece using a metal forming process. The metal forming process includes radial forging, rolling, pilgering, and/or flowforming.
    Type: Grant
    Filed: August 13, 2010
    Date of Patent: July 9, 2013
    Assignee: Dynamic Flowform Corp.
    Inventor: Matthew V. Fonte
  • Patent number: 8449845
    Abstract: In light of the recent analytical technology demanded of fast and accurate measurement of high purity materials, a zirconium crucible is provided for melting an analytical sample and is capable of inhibiting the inclusion of impurities from the crucible by using a high-purity crucible, improving the durability of high-purity zirconium as an expensive crucible material, and increasing the number of times that the zirconium crucible can be used. With this zirconium crucible used for melting an analytical sample in the pretreatment of the analytical sample, the purity excluding gas components is 3N or higher, and the content of carbon as a gas component is 100 mass ppm or less.
    Type: Grant
    Filed: August 8, 2008
    Date of Patent: May 28, 2013
    Assignee: JX Nippon Mining & Metals Corporation
    Inventors: Yuichiro Shindo, Masahiro Sakaguchi, Mitsuru Yamaguchi
  • Patent number: 8359732
    Abstract: A method of manufacturing an optimized sheet metal (1) of a zirconium based alloy is described, which optimized sheet metal (1) defines a sheet plane (BA). The method comprises the steps of providing a sheet metal (2) of a zirconium based. alloy, subjecting the sheet metal (2) to at least a preparing cold rolling and a final cold rolling, wherein the preparing cold rolling and the final cold rolling are both performed in a common rolling direction, and heat treating the sheet metal (1) between the preparing cold rolling and the final cold rolling so that the zirconium based alloy is partially re-crystallized. A method of manufacturing a spacer grid using an optimized sheet metal (1) according to the invention is also described.
    Type: Grant
    Filed: January 15, 2008
    Date of Patent: January 29, 2013
    Assignee: Westinghouse Electric Sweden AB
    Inventors: Lars Hallstadius, Mats Dahlbäck, John Bates, James Dougherty, Steven J. King, Robert J. Comstock
  • Patent number: 8349248
    Abstract: A metallic material is made from at least one refractory metal or an alloy based on at least one refractory metal. The metallic material has an oxygen content of about 1,000 to about 30,000 ?g/g and the oxygen is interstitial.
    Type: Grant
    Filed: April 13, 2006
    Date of Patent: January 8, 2013
    Assignee: Heraeus Precious Metals GmbH & Co. KG
    Inventors: Jens Trotzschel, Bernd Spaniol
  • Publication number: 20120291929
    Abstract: Method, and articles therefrom, for providing a hard, abrasion-resistant, attractive, oxide surface layer of selectable thickness and having an outer appearance within the scale from gray to black, to a zirconium titanium alloy article by heating the article in an oxygen containing atmosphere.
    Type: Application
    Filed: August 2, 2012
    Publication date: November 22, 2012
    Inventor: Gad Zak
  • Patent number: 8262814
    Abstract: Method, and articles therefrom, for providing a hard, abrasion-resistant, attractive, oxide surface layer of selectable thickness and having an outer appearance within the scale from gray to blackness, to a zirconium titanium alloy article by heating the article in an oxygen containing atmosphere.
    Type: Grant
    Filed: November 17, 2008
    Date of Patent: September 11, 2012
    Inventor: Gad Zak
  • Patent number: 8257518
    Abstract: The invention concerns a method of producing and treating a sheet suited to be used as a component or as a part of a component in a fuel assembly for a nuclear light water reactor, which method comprises: a) producing a sheet of a Zr-based alloy by forging, hot rolling and cold rolling in a suitable number of steps, b) carrying out an ?+? quenching or a ? quenching of the sheet when the sheet has been produced to a thickness which is equal to or almost equal to the final thickness of the finished sheet, c) heat treating the sheet in the ?-phase temperature range of said alloy, wherein the sheet is stretched during the heat treatment according to step c). The invention also concerns a use of a sheet that is produced and treated according to this method, and to methods and fuel assemblies of which said sheet forms a part.
    Type: Grant
    Filed: January 7, 2004
    Date of Patent: September 4, 2012
    Assignee: Westinghouse Electric Sweden AB
    Inventor: Mats Dahlbäck
  • Patent number: 8241440
    Abstract: Methods for producing zirconium strips that demonstrate improved formability are disclosed. The zirconium strips of the present disclosure have a purity and crystalline microstructure suitable for improved formability, for example, in the manufacture of certain articles such as panels for plate heat exchangers and high performance tower packing components. Other embodiments disclosed herein relate to formed substantially pure zirconium strip, articles of manufacture produced from the substantially pure zirconium strip, and methods for making the articles of manufacture.
    Type: Grant
    Filed: February 7, 2011
    Date of Patent: August 14, 2012
    Assignee: ATI Properties, Inc.
    Inventor: Craig M. Eucken
  • Publication number: 20120114091
    Abstract: Disclosed is a zirconium alloy material having high corrosion resistance regardless of thermal history during its manufacturing process. The zirconium alloy material is obtained by providing a zirconium alloy containing on the mass basis: 0.001% to 1.9% of Sn, 0.01% to 0.3% of Fe, 0.01% to 0.3% of Cr, 0.001% to 0.3% of Ni, 0.001% to 3.0% of Nb, 0.027% or less of C, 0.025% or less of N, 4.5% or less of Hf and 0.16% or less of O with the remainder being inevitable impurities and zirconium, being formed of a bulk alloy and a surface layer, in which the surface layer has a plastic strain of 3 or more or a Vickers hardness of 260 HV or more and an arithmetic mean surface roughness Ra of 0.2 ?m or less.
    Type: Application
    Filed: November 8, 2011
    Publication date: May 10, 2012
    Inventors: Ryo ISHIBASHI, Masahisa Inagaki, Hideo Soneda, Naoya Okizaki, Tomomi Nakamura, Yoshikazu Todaka, Hiroaki Azuma, Nozomu Adachi, Minoru Umemoto
  • Patent number: 8172958
    Abstract: The present disclosure provides methods of making an improved composition and medical implant made therefrom. The methods generally comprise forming a ceramic layer, diffusion hardening, and optionally, forming another ceramic layer. The present disclosure provides methods of making an improved composition having a thick diffusion hardened zone and orthopedic implants comprising the improved composition.
    Type: Grant
    Filed: May 27, 2008
    Date of Patent: May 8, 2012
    Assignee: Smith & Nephew, Inc.
    Inventors: Vivek Pawar, Shilesh C. Jani, Carolyn Weaver
  • Patent number: 8137488
    Abstract: The invention relates to a method of producing a flat zirconium alloy product with a Kearns factor (cross direction) of between 0.3 and 0.7. The inventive method consists in: producing an ingot containing Nb=0.5 to 3.5%, Sn=0 to 1.5%, Fe=0 to 0.5%, Cr+V=0 to 0.3%, S=0 to 100 ppm, O=0 to 2000 ppm, Si=0 to 150 ppm, the remainder being zirconium and impurities; shaping the aforementioned ingot; performing one or more hot rolling operations in order to obtain a flat product, whereby the last operation is performed at between(810?20×Nb %)° C. and 1100° C. and is not followed by any quenching from phase ?+? or ?; optionally performing an annealing operation at a maximum of 800° C.; and performing one or more cold rolling and annealing operations, said annealing operations being performed at a maximum of 800° C. The invention also relates to the flat zirconium alloy product thus obtained.
    Type: Grant
    Filed: September 29, 2004
    Date of Patent: March 20, 2012
    Assignee: Compagnie Europeenne du Zirconium CEZUS
    Inventors: Pierre Barberis, Claude Simonot
  • Publication number: 20120060981
    Abstract: Methods of refining the grain size of titanium and titanium alloys include thermally managed high strain rate multi-axis forging. A high strain rate adiabatically heats an internal region of the workpiece during forging, and a thermal management system is used to heat an external surface region to the workpiece forging temperature, while the internal region is allowed to cool to the workpiece forging temperature. A further method includes multiple upset and draw forging titanium or a titanium alloy using a strain rate less than is used in conventional open die forging of titanium and titanium alloys. Incremental workpiece rotation and draw forging causes severe plastic deformation and grain refinement in the titanium or titanium alloy forging.
    Type: Application
    Filed: September 15, 2010
    Publication date: March 15, 2012
    Applicant: ATI Properties, Inc.
    Inventors: Robin M. Forbes Jones, John V. Mantione, Urban J. De Souza, Jean-Philippe Thomas, Ramesh Minisandram, Richard L. Kennedy, R. Mark Davis
  • Patent number: 8105448
    Abstract: A method for manufacturing a sheet metal for use in a boiling water nuclear reactor and such a sheet metal. The method includes providing a material of a zirconium alloy that includes zirconium, and whose main alloying materials include niobium. The material is annealed so that essentially all niobium containing secondary phase particles are transformed to ?-niobium particles.
    Type: Grant
    Filed: June 22, 2005
    Date of Patent: January 31, 2012
    Assignee: Westinghouse Electric Sweden AB
    Inventors: Lars Hallstadius, Mats Dahlbäck, Magnus Limbäck, John Bates, James Dougherty
  • Patent number: 8070892
    Abstract: A high Fe-containing zirconium composition having excellent corrosion resistance and a preparation method thereof. Specifically, disclosed are a high Fe-containing zirconium composition having excellent corrosion resistance and a preparation method thereof, the composition comprising: 0.5-1.0 wt % iron; 0.25-0.5 wt % chromium; 0.06-0.18 wt % oxygen; at least one element selected from the group consisting of 0.2-0.5 wt % tin, 0.1-0.3 wt % niobium and 0.05-0.3 wt % copper; and the balance of zirconium. The zirconium alloy has excellent corrosion resistance, and thus can be used as a material for nuclear fuel claddings, spacer grids and nuclear reactor core structures in light water reactor and heavy water reactor nuclear power plants.
    Type: Grant
    Filed: April 12, 2007
    Date of Patent: December 6, 2011
    Assignees: Korea Atomic Energy Research Institute, Korea Hydro and Nuclear Power Co. Ltd.
    Inventors: Yong Hwan Jeong, Hyun Gil Kim, Sang Yoon Park, Myung Ho Lee, Byoung Kwon Choi, Jong Hyuk Baek, Jeong Yong Park, Jun Hwan Kim
  • Patent number: 8062440
    Abstract: A hafnium alloy target containing either or both of Zr and Ti in a gross amount of 100 wtppm-10 wt % in Hf, wherein the average crystal grain size is 1-100 ?m, the impurities of Fe, Cr and Ni are respectively 1 wtppm or less, and the habit plane ratio of the plane {002} and three planes {103}, {014} and {015} lying within 35° from {002} is 55% or greater, and the variation in the total sum of the intensity ratios of these four planes depending on locations is 20% or less. As a result, obtained is a hafnium alloy target having favorable deposition property and deposition speed, which generates few particles, and which is suitable for forming a high dielectric gate insulation film such as HfO or HfON film, and the manufacturing method thereof.
    Type: Grant
    Filed: September 4, 2008
    Date of Patent: November 22, 2011
    Assignee: JX Nippon Mining & Metals Corporation
    Inventors: Takeo Okabe, Shuichi Irumata, Yasuhiro Yamakoshi, Hirohito Miyashita, Ryo Suzuki
  • Patent number: 8043448
    Abstract: Disclosed herein are zirconium-based alloys that may be fabricated to form nuclear reactor components, particularly fuel cladding tubes, that exhibit sufficient corrosion resistance and hydrogen absorption characteristics, without requiring a late stage ?+? or ?-quenching processes. The zirconium-base alloys will include between about 1.30-1.60 wt % tin; 0.0975-0.15 wt % chromium; 0.16-0.24 wt % iron; and up to about 0.08 wt % nickel, with the total content of the iron, chromium and nickel comprising at least about 0.3175 wt % of the alloy. The resulting components will exhibit a surface region having a mean precipitate sizing of between about 50 and 100 nm and a Sigma A of less than about 2×10?19 hour with the workpiece processing generally being limited to temperatures below 680° C. for extrusion and below 625° C. for all other operations, thereby simplifying the fabrication of the nuclear reactor components while providing corrosion resistance comparable with conventional alloys.
    Type: Grant
    Filed: September 8, 2004
    Date of Patent: October 25, 2011
    Assignee: Global Nuclear Fuel-Americas, LLC
    Inventors: David White, Daniel R. Lutz, Yang-Pi Lin, John Schardt, Gerald Potts, Robert Elkins, Hiroaki Kagami, Hideyuki Mukai
  • Publication number: 20110232439
    Abstract: A method of manufacturing an optimized sheet metal (1) of a zirconium based alloy is described, which optimized sheet metal (1) defines a sheet plane (BA). The method comprises the steps of providing a sheet metal (2) of a zirconium based. alloy, subjecting the sheet metal (2) to at least a preparing cold rolling and a final cold rolling, wherein the preparing cold rolling and the final cold rolling are both performed in a common rolling direction, and heat treating the sheet metal (1) between the preparing cold rolling and the final cold rolling so that the zirconium based alloy is partially re-crystallized. A method of manufacturing a spacer grid using an optimized sheet metal (1) according to the invention is also described.
    Type: Application
    Filed: January 15, 2008
    Publication date: September 29, 2011
    Inventors: Lars Hallstadius, Mats Dahlback, John Bates, James Dougherty, Steven J. King, Robert J. Comstock
  • Publication number: 20110120602
    Abstract: Methods for producing zirconium strips that demonstrate improved formability are disclosed. The zirconium strips of the present disclosure have a purity and crystalline microstructure suitable for improved formability, for example, in the manufacture of certain articles such as panels for plate heat exchangers and high performance tower packing components. Other embodiments disclosed herein relate to formed substantially pure zirconium strip, articles of manufacture produced from the substantially pure zirconium strip, and methods for making the articles of manufacture.
    Type: Application
    Filed: February 7, 2011
    Publication date: May 26, 2011
    Applicant: ATI Properties, Inc.
    Inventor: Craig M. Eucken
  • Patent number: 7927435
    Abstract: Methods for producing zirconium strips that demonstrate improved formability are disclosed. The zirconium strips of the present disclosure have a purity and crystalline microstructure suitable for improved formability, for example, in the manufacture of certain articles such as panels for plate heat exchangers and high performance tower packing components. Other embodiments disclosed herein relate to formed substantially pure zirconium strip, articles of manufacture produced from the substantially pure zirconium strip, and methods for making the articles of manufacture.
    Type: Grant
    Filed: September 30, 2009
    Date of Patent: April 19, 2011
    Assignee: ATI Properties, Inc.
    Inventor: Craig M. Eucken
  • Patent number: 7883592
    Abstract: A method of forming bulk metallic glass engineering materials, and more particularly a method for forming coarsening microstructures within said engineering materials is provided. Specifically, the method forms ‘designed composites’ by introducing ‘soft’ elastic/plastic inhomogeneities in a metallic glass matrix to initiate local shear banding around the inhomogeneity, and matching of microstructural length scales (for example, L and S) to the characteristic length scale RP (for plastic shielding of an opening crack tip) to limit shear band extension, suppress shear band opening, and avoid crack development.
    Type: Grant
    Filed: March 31, 2008
    Date of Patent: February 8, 2011
    Assignee: California Institute of Technology
    Inventors: Douglas C. Hofmann, William C. Johnson
  • Publication number: 20100322370
    Abstract: A process of manufacturing zirconium alloy. The process may be used to make a nuclear fuel guide tube and/or a measuring tube which are main components of a nuclear fuel assembly structure. While a nuclear fuel guide tube and a measuring tube are manufactured by performing three-step cold working, and intermediate and final thermal annealing from a semi-finished TREX shell in the conventional method, the present invention relates to zirconium alloy undergoing two-step cold working, and intermediate and final thermal annealing from a TREX shell, resulting in enhanced strength and corrosion resistance.
    Type: Application
    Filed: April 29, 2010
    Publication date: December 23, 2010
    Applicants: Korea Atomic Energy Research Institute, Korea Hydro and Nuclear Power Co., Ltd.
    Inventors: Hyun Gil Kim, Yong-Hwan Jeong, Sang-Yoon Park, Byoung-Kwon Choi, Jeong-Yong Park, Yang-II Jung, Dong-Jun Park
  • Patent number: 7763132
    Abstract: A large ingot is produced by casting the zirconium alloy, then the ingot is forged in two stages to obtain the semi-finished product wherein the first stage of forging the ingot is performed at a temperature at which the zirconium alloy is in a state comprising crystalline ? and ? phases.
    Type: Grant
    Filed: January 7, 2004
    Date of Patent: July 27, 2010
    Assignee: Compagnie Europeenne du Zirconium-Cezus
    Inventors: Pierre Barberis, Noël Rizzi, Xavier Robbe
  • Patent number: 7738620
    Abstract: A method for production of a fuel cladding tube for a nuclear reactor, characterized by the preparation of an ingot of an alloy of zirconium with the following composition by weight %: 0.8%?Nb?2.8%, traces?Sn?0.65%, 0.015%?Fe?0.40%, C?100 ppm, 600 ppm?O?2300 ppm, 5 ppm?S?100 ppm, Cr+V?0.25%, Hf?75 ppm and F?1 ppm the remainder being zirconium and impurities arising from production. The ingot is then subjected to forging, a hardening and thermomoechanical treatments comprising cold laminations separated by intermediate annealing, all intermediate annealings being carried out at a temperature below the ???+? transition temperature of the alloy, finishing with a recrystallization annealing and resulting in the production of a tube, whereupon an optional external cleaning of the tube is carried out and a mechanical polishing of the external surface of the tube is carried out to give a roughness Ra less than or equal to 0.5 ?m. The invention further relates to a fuel cladding tube obtained thereby.
    Type: Grant
    Filed: July 19, 2005
    Date of Patent: June 15, 2010
    Assignee: Areva NP
    Inventors: Pierre Barberis, Jean-Paul Mardon, Véronique Rebeyrolle, Jean-Luc Aubin
  • Patent number: 7715518
    Abstract: The invention concerns a method of producing a cladding tube for nuclear fuel for a nuclear boiling water reactor. According to the method, a tube is formed which comprises an outer cylindrical component (10) mainly containing zirconium and an inner cylindrical component (20) metallurgically bonded to the outer component (10), wherein also the inner component (20) at least mainly contains zirconium. The inner component (20) has a lower recrystallization temperature than the outer component (10). The cladding tube is final annealed at a temperature and during a time such that the inner component (20) substantially completely recrystallizes and such that the outer component (10) partly recrystallizes but to a lower extent than the inner component (20). The invention also concerns a cladding tube, a fuel assembly for a boiling water reactor as well as the use of a cladding tube.
    Type: Grant
    Filed: June 4, 2003
    Date of Patent: May 11, 2010
    Assignee: Westinghouse Electric Sweden AB
    Inventors: Mats Dahlbäck, Magnus Limbäck
  • Publication number: 20100018616
    Abstract: Methods for producing zirconium strips that demonstrate improved formability are disclosed. The zirconium strips of the present disclosure have a purity and crystalline microstructure suitable for improved formability, for example, in the manufacture of certain articles such as panels for plate heat exchangers and high performance tower packing components. Other embodiments disclosed herein relate to formed substantially pure zirconium strip, articles of manufacture produced from the substantially pure zirconium strip, and methods for making the articles of manufacture.
    Type: Application
    Filed: September 30, 2009
    Publication date: January 28, 2010
    Applicant: ATI Properties, Inc.
    Inventor: Craig M. Eucken
  • Patent number: 7630470
    Abstract: A method of fabricating a zirconium alloy flat product, the method being characterized by: preparing or casting a zirconium alloy ingot containing at least 95% by weight of zirconium, and including the usual impurities and alloying elements; shaping said ingot in order to obtain a flat product; subjecting said flat product to a ? quenching operation under conditions that are determined to obtain within the flat product an acicular structure at the end of said ? quenching; subjecting said flat product, after the ? quenching, to a rolling operation performed in a single rolling sequence without intermediate annealing, said rolling being performed at a temperature lying in the range ambient to 200° C., and having a reduction ratio lying in the range 2% to 20%; and subjecting said rolled flat product to an annealing treatment in the a range or in the ?+? range, performed in the temperature range 500° C. to 800° C. for 2 minutes to 10 hours.
    Type: Grant
    Filed: July 20, 2004
    Date of Patent: December 8, 2009
    Assignee: Compagnie Europeenne du Zirconium-Cezus
    Inventors: Pierre Barberis, Claude Simonot
  • Patent number: 7625453
    Abstract: Methods for producing zirconium strips that demonstrate improved formability are disclosed. The zirconium strips of the present disclosure have a purity and crystalline microstructure suitable for improved formability, for example, in the manufacture of certain articles such as panels for plate heat exchangers and high performance tower packing components. Other embodiments disclosed herein relate to formed substantially pure zirconium strip, articles of manufacture produced from the substantially pure zirconium strip, and methods for making the articles of manufacture.
    Type: Grant
    Filed: September 7, 2005
    Date of Patent: December 1, 2009
    Assignee: ATI Properties, Inc.
    Inventor: Craig M. Eucken
  • Publication number: 20090285350
    Abstract: A fuel channel according to example embodiments for a nuclear reactor may have an elongated and hollow body with a multi-layer structure. The multi-layer structure may include a core layer and at least one cladding layer metallurgically-bonded to the core layer. The core layer and the at least one cladding layer may be alloys having different compositions. For instance, the core layer may be significantly more resistant to irradiation growth and/or irradiation creep than the at least one cladding layer, and the at least one cladding layer may have an increased resistance to hydrogen absorption and/or corrosion relative to the core layer. Accordingly, the distortion of the fuel channel may be reduced or prevented, thus reducing or preventing the interference with the movement of the control blade.
    Type: Application
    Filed: May 19, 2008
    Publication date: November 19, 2009
    Inventors: Paul Everett Cantonwine, David William White
  • Publication number: 20090071579
    Abstract: A method for manufacturing a sheet metal for use in a boiling water nuclear reactor and such a sheet metal. The method includes providing a material of a zirconium alloy that includes zirconium, and whose main alloying materials include niobium. The material is annealed so that essentially all niobium containing secondary phase particles are transformed to ?-niobium particles.
    Type: Application
    Filed: June 22, 2005
    Publication date: March 19, 2009
    Applicant: Westinghouse electric Sweden AB
    Inventors: Lars Hallstadius, Mats Dahlback, Magnus Limback, John Bates, James Dougherty
  • Patent number: 7473329
    Abstract: A method of producing a cladding tube for nuclear fuel for a nuclear pressure water reactor includes forming a tube which at least principally consists of a cylindrical tube component of a zirconium-based alloy, where the alloying element, except for zirconium, which has the highest content in the alloy is niobium, wherein the niobium content in weight percent is between about 0.5 and about 2.4 and wherein no alloying element, except for zirconium and niobum, in the alloy, has a content which exceeds about 0.2 weight percent. The cladding tube is then annealed such that the tube component is partly but not completely recrystallized. The degree of recrystallization in the tube component is higher than about 40% and lower than about 95%. A fuel assembly for a nuclear pressure water reactor also has a plurality of such cladding tubes.
    Type: Grant
    Filed: October 30, 2003
    Date of Patent: January 6, 2009
    Assignee: Westinghouse Electric Sweden AB
    Inventors: Mats Dahlbäck, Lars Hallstadius
  • Publication number: 20080080660
    Abstract: A method for production of a fuel cladding tube for a nuclear reactor, characterised by the preparation of an ingot of an alloy of zirconium with the following composition by weight %: 0.8%?Nb?2.8%, traces?Sn?0.65%, 0.015%?Fe?0.40%, C?100 ppm, 600 ppm?O?2300 ppm, 5 ppm?S?100 ppm, Cr+V?0.25%, Hf?75 ppm and F?1 ppm the remainder being zirconium and impurities arising from production. The ingot is then subjected to forging, a hardening and thermomoechanical treatments comprising cold laminations separated by intermediate annealing, all intermediate annealings being carried out at a temperature below the ???+? transition temperature of the alloy, finishing with a recrystallisation annealing and resulting in the production of a tube, whereupon an optional external cleaning of the tube is carried out and a mechanical polishing of the external surface of the tube is carried out to give a roughness Ra less than or equal to 0.5 ?m. The invention further relates to a fuel cladding tube obtained thereby.
    Type: Application
    Filed: July 19, 2005
    Publication date: April 3, 2008
    Inventors: Pierre Barberis, Jean-Paul Mardon, Veronique Rebeyrolle, Jean-Luc Aubin
  • Publication number: 20080078483
    Abstract: A method to assess light water reactor fuel integrity is presented having the steps of granting access in a nuclear reactor fuel pool to at least one of a discharged fuel rod and a nuclear fuel assembly, calculating an operating flux for the fuel rod, measuring a thickness of CRUD on the fuel rod, measuring a thickness of oxide on the fuel rod, calculating a maximized flux for the at least one fuel rod for a position of the one fuel rod in a nuclear reactor, calculating a maximized deposit for the fuel rod, calculating a maximized oxide thickness for the fuel rod, calculating a fuel condition index of the fuel rod, comparing the fuel condition index to an index constant, and removing the fuel rod from operation when the fuel condition index is greater than the index constant.
    Type: Application
    Filed: July 21, 2006
    Publication date: April 3, 2008
    Inventors: Mihai G.M. Pop, Brian Glenn Lockamon
  • Publication number: 20070137734
    Abstract: The present invention relates to a new composition and medical implant made therefrom, the composition comprising a thick diffusion hardened zone, and preferably further comprising a ceramic layer. The present invention relates to orthopedic implants comprising the new composition, methods of making the new composition, and methods of making orthopedic implants comprising the new composition.
    Type: Application
    Filed: November 10, 2006
    Publication date: June 21, 2007
    Applicant: Smith & Nephew Inc.
    Inventors: Vivek Pawar, Shilesh C. Jani, Carolyn Weaver
  • Patent number: 7208055
    Abstract: An article of titanium or a titanium-based alloy, or of zirconium or a zirconium-based alloy is case hardened by heat treatment for at least 12 hours at one or more temperatures in the range of 850° C. to 900° C. and at a pressure in the order of atmospheric pressure in an oxygen diffusion atmosphere. The oxygen diffusion atmosphere comprises a carrier gas such as argon which does not react chemically with the article the said temperature range and molecular oxygen. The concentration of oxygen as the oxygen diffusion atmosphere is in the range of 10 volumes per million to 400 volumes per million.
    Type: Grant
    Filed: July 14, 2003
    Date of Patent: April 24, 2007
    Assignee: The BOC Group, plc
    Inventors: Paul Francis Stratton, John B. Boodey
  • Patent number: 6909766
    Abstract: One object of the present invention is to provide a production method for a nuclear fuel assembly support grid that improves the corrosion resistance of welded parts without impairing the characteristics of the support grid so as to be able adequately withstand highly efficient operation. In order to achieve the object, the present invention provide a production method for a nuclear fuel assembly support grid comprising the steps of: assembling a plurality of straps in a grid form; welding intersections of each strap; and carrying out annealing thereafter to precipitate an intermetallic compound on the welded parts.
    Type: Grant
    Filed: November 5, 2002
    Date of Patent: June 21, 2005
    Assignees: Mitsubishi Nuclear Fuel Co., Ltd., Mitsubishi Heavy Industries, Ltd., Nuclear Development Corporation
    Inventors: Toshiya Kido, Kimio Nakayama, Yasunao Yamaguchi
  • Patent number: 6902634
    Abstract: The present invention relates to a method for manufacturing zirconium-based alloys containing niobium with superior corrosion resistance for use in nuclear fuel rod claddings. The method of this invention comprises melting of the alloy, ?-forging, ?-quenching, hot-working, vacuum annealing, cold-working, intermediate annealing and final annealing, whereby the niobium concentration in the ?-Zr matrix decreases from the supersaturation state to the equilibrium state to improve the corrosion resistance of the alloy. Such zirconium-based alloys containing niobium are usefully applied to nuclear fuel rod cladding of the cores in light water reactors and heavy water reactors.
    Type: Grant
    Filed: July 9, 2002
    Date of Patent: June 7, 2005
    Assignees: Korea Atomic Energy Research Institute, Korea Hydro & Nuclear Power Co., Ltd.
    Inventors: Yong Hwan Jeong, Jong Hyuk Baek, Byoung Kwon Choi, Sang Yoon Park, Myung Ho Lee, Cheol Nam, Jeong Yong Park, Youn Ho Jung
  • Patent number: 6863745
    Abstract: The invention proposes a zirconium-based alloy also containing, by weight, apart from unavoidable impurities, from 0.02 to 1% of iron having from 0.8% to 2.3% of niobium, less than 2000 ppm of tin, less than 2000 ppm of oxygen, less than 100 ppm of carbon, from 5 to 35 ppm of sulphur and from 0.01% to 0.25% in total of chromium and/or vanadium, the ratio R of the niobium content, less 0.5%, to the iron content, optionally supplemented by the chromium and/or vanadium content.
    Type: Grant
    Filed: September 28, 2000
    Date of Patent: March 8, 2005
    Assignees: Framatome ANP, Compagnie Europeenne du Zirconium CEZUS
    Inventors: Daniel Charquet, Jean Paul Mardon, Jean Senevat
  • Patent number: RE43182
    Abstract: A zirconium alloy tube for forming the whole or the outer portion of a nuclear fuel pencil housing or a nuclear fuel assembly guide tube. The zirconium alloy contains 0.8-1.8 wt. % of niobium, 0.2-0.6 wt. % of tin and 0.02-0.4 wt. % of iron, and has a carbon content of 30-180 ppm, a silicon content of 10-120 ppm and an oxygen content of 600-1800 ppm. The tube may be used when recrystallized or stress relieved.
    Type: Grant
    Filed: July 22, 1996
    Date of Patent: February 14, 2012
    Assignee: AREVA NP
    Inventors: Jean-Paul Mardon, Jean Senevat, Daniel Charquet