[특허]Method of fabricating Zircaloy tubing having high resistance to crack propagation

Method of fabricating Zircaloy tubing having high resistance to crack propagation 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	C22F-001/18
출원번호	US-0385807 (1995-02-09)
발명자 / 주소	Adamson Ronald Bert (Fremont CA) Potts Gerald Allen (San Jose CA)
출원인 / 주소	General Electric Co., Wilmington Facility (Wilmington NC 02)
인용정보	피인용 횟수 : 19 인용 특허 : 0

초록 ▼

In a zirconium-alloy fuel element cladding, a method for generating regions of coarse and fine intermetallic precipitates across the cladding wall is provided. The method includes steps of specific heat treatments and anneals that coarsen precipitates in the bulk of the cladding. The method also includes at least one step in which an outer region (exterior) of the cladding is heated to the beta or alpha plus beta phase, while an inner region (interior) is maintained at a temperature at which little or no metallurgical change occurs. This method produces a composite cladding in which the outer region comprises fine precipitates and the inner region comprises coarse precipitates.

대표청구항 ▼

A cladding tube having precipitates that vary in coarseness and density across the cladding wall, with coarse precipitates having an average diameter ranging from between about 0.15 and 2 micrometers in an inner region and fine precipitates having an average diameter ranging from between about 0.01 and 0.15 micrometers in an outer region, the cladding tube fabricated from a zirconium alloy tube by a method comprising steps of: (a) performing a coarsening anneal on the zirconium alloy tube at a temperature of at least about 700°C. for between about 1 and 100 hours such that precipitates coarsen throughout the entire tube; (b) selectively heat treating the outer region of the zirconium alloy tube by first heating the outer region to at least the alpha plus beta region while cooling the inner region of the tube and then rapidly quenching the outer region; and (c) performing one or more cold work steps on the zirconium alloy tube, each followed by an annealing step, the annealing step or steps being conducted at a temperature of greater than about 576°C., wherein the coarse precipitates in the inner region impart resistance to axial crack propagation in the cladding tube.

이 특허를 인용한 특허 (19)

Bashkirtsev, Sergey Mikhailovich; Kuznetsov, Valentin Fedorovich; Kevrolev, Valery Vladimirovich; Morozov, Alexey Glebovich; Montgomery, Michael H., Fuel assembly.
상세보기
Bashkirtsev, Sergey Mikhailovich; Kuznetsov, Valentin Fedorovich; Kevrolev, Valery Vladimirovich; Morozov, Alexey Glebovich; Montgomery, Michael H., Fuel assembly.
상세보기
Bashkirtsev, Sergey Mikhailovich; Morozov, Alexey Glebovich; Totemeier, Aaron, Fuel assembly.
상세보기
Totemeier, Aaron; Bashkirtsev, Sergey M.; Morozov, Alexey G., Fuel assembly.
상세보기
Garzarolli,Friedrich; Seibold,Angelika; Ruhmann,Heinrich, Fuel element for a pressurized water reactor.
상세보기
Garzarolli, Friedrich; Seibold, Angelika; Ruhmann, Heinrich, Fuel element for a pressurized water reactor and method for producing cladding tubes.
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Steinberg, Eckard, Fuel rod cladding tube for a boiling water reactor fuel rod and the production thereof.
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Bashkirtsev, Sergey M.; Kuznetsov, Valentin F.; Kevrolev, Valery V.; Morozov, Alexey G., Light-water reactor fuel assembly (alternatives), a light-water reactor, and a fuel element of fuel assembly.
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Barberis, Pierre; Simonot, Claude, Method for making a flat zirconium alloy product, resulting flat product and fuel, assembly component for nuclear power plant reactor made from said flat product.
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White, David; Lutz, Daniel R.; Lin, Yang-Pi; Schardt, John; Potts, Gerald; Elkins, Robert; Kagami, Hiroaki; Mukai, Hideyuki, Non-heat treated zirconium alloy fuel cladding and a method of manufacturing the same.
상세보기
Bashkirtsev, Sergey Mikhailovich; Kuznetsov, Valentin Fedorovich; Kevrolev, Valery Vladimirovich; Morozov, Alexei Glebovich; Montgomery, Michael H., Nuclear reactor (alternatives), fuel assembly of seed-blanket subassemblies for nuclear reactor (alternatives), and fuel element for fuel assembly.
상세보기
Bashkirtsev, Sergey Mikhailovich; Kuznetsov, Valentin Fedorovich; Kevrolev, Valery Vladimirovich; Morozov, Alexey Glebovich, Nuclear reactor (alternatives), fuel assembly of seed-blanket subassemblies for nuclear reactor (alternatives), and fuel element for fuel assembly.
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Walters, Leon C., Sheathed, annular metal nuclear fuel.
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Walters, Leon C., Small, fast neutron spectrum nuclear power plant with a long refueling interval.
상세보기
Walters, Leon C., Small, fast neutron spectrum nuclear power plant with a long refueling interval.
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White, David; Lutz, Daniel R.; Lin, Yang-Pi; Schardt, John; Potts, Gerald, Zirconium alloy fuel cladding for operation in aggressive water chemistry.
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Foster, John P.; Comstock, Robert J.; Atwood, Andrew; Pan, Guirong; Garde, Anand; Dahlback, Mats; Mundorff, Jonna Partezana; Mueller, Andrew J., Zirconium alloys with improved corrosion/creep resistance.
상세보기
Foster, John P.; Colburn, David; Comstock, Robert; Cook, Terrence; Dahlback, Mats; Garde, Anand; Jourdain, Pascal; Kesterson, Ronald; McClarren, Michael; Nuhfer, Dianna Lynn Svec; Pan, Guirong; Mundorff, Jonna Partezana; Yueh, Hsiang Ken; Boshers, James A.; File, Penney, Zirconium alloys with improved corrosion/creep resistance due to final heat treatments.
상세보기
Foster, John P.; Comstock, Robert J.; Atwood, Andrew; Pan, Guirong; Garde, Anand; Dahlback, Mats; Mundorff, Jonna Partezana; Mueller, Andrew J., Zirconium alloys with improved corrosion/creep resistance due to final heat treatments.
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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

내보내기 구분	파일저장 인쇄 메일전송
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연합인증

Method of fabricating Zircaloy tubing having high resistance to crack propagation 원문보기

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연구과제 타임라인

이 특허를 인용한 특허 (19)

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Method of fabricating Zircaloy tubing having high resistance to crack propagation 원문보기

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연구과제 타임라인

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이 특허를 인용한 특허 (19)

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