Induced nuclear reactions: processes – systems – and elements – Reactor structures
Reexamination Certificate
2004-07-20
2009-12-08
Palabrica, Rick (Department: 3663)
Induced nuclear reactions: processes, systems, and elements
Reactor structures
C376S377000, C376S434000, C148S672000, C148S421000, C420S422000
Reexamination Certificate
active
07630470
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 β quenching operation under conditions that are determined to obtain within the flat product an acicular structure at the end of said β quenching; subjecting said flat product, after the β 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 α+β range, performed in the temperature range 500° C. to 800° C. for 2 minutes to 10 hours. A zirconium alloy flat product as obtained by the method, and a fuel assembly element for a power station nuclear reactor obtained by shaping the product.
REFERENCES:
patent: 3336201 (1967-08-01), Graham et al.
patent: 3776508 (1973-12-01), Katz
patent: 3865635 (1975-02-01), Hofvenstam et al.
patent: 4017368 (1977-04-01), Wax et al.
patent: 4383853 (1983-05-01), Zapffe
patent: 4450016 (1984-05-01), Vesterlund et al.
patent: 4450020 (1984-05-01), Vesterlund
patent: 4584030 (1986-04-01), McDonald et al.
patent: 4595413 (1986-06-01), Hard et al.
patent: 4604148 (1986-08-01), Anderson
patent: 4764223 (1988-08-01), Charquet et al.
patent: 4938921 (1990-07-01), Mardon et al.
patent: 5242515 (1993-09-01), Worcester et al.
patent: 5297177 (1994-03-01), Inagaki et al.
patent: 5304261 (1994-04-01), Yamamoto et al.
patent: 5310431 (1994-05-01), Buck
patent: 5487797 (1996-01-01), Dumas et al.
patent: 5618502 (1997-04-01), Byers et al.
patent: 5681404 (1997-10-01), Adamson et al.
patent: 5735978 (1998-04-01), Mardon et al.
patent: 5876524 (1999-03-01), Andersson
patent: 6554179 (2003-04-01), Horner et al.
patent: 6699398 (2004-03-01), Kim
patent: 0 647 724 (1995-04-01), None
patent: 0 795 618 (1997-09-01), None
patent: 2 303 865 (1976-10-01), None
patent: 2 673 198 (1992-08-01), None
patent: 09 257988 (1997-10-01), None
patent: WO 97/40659 (1997-11-01), None
Erich Tenckhoff,Deformation Mechanisms, Texture, and Anisotropy in Zirconium and Zircaloy, ASTM Special Technical Publication, Philadelphia, PA, 1998, pp. 31 to 32 and 53 to 54.
Jean Luc Aubin, Pierre Montmitonnet, and Sandrine Mulot, “Zirconium Alloy Cold Pilgering Process Control by Modeling,” Zirconium in the Nuclear Industry: Twelfth Symposium. 2000, pp. 460 to 481.
Barberis Pierre
Simonot Claude
Compagnie Europeenne du Zirconium-Cezus
Davidson Davidson & Kappel LLC
Palabrica Rick
LandOfFree
Method for making a flat zirconium alloy product, resulting... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for making a flat zirconium alloy product, resulting..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for making a flat zirconium alloy product, resulting... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4124495