Process for the production of a tubular zircaloy 2 blank interna

Details Process for the production of a tubular zircaloy 2 blank interna Process for the production of a tubular zircaloy 2 blank interna

1995-03-07

1997-03-11

Wyszomierski, George

Metal treatment

Process of modifying or maintaining internal physical...

Producing or treating layered, bonded, welded, or...

148672, C22F 118

Patent

active

056096976

ABSTRACT:
The invention concerns a process for the production of a tubular zircaloy 2 blank which is internally clad with zirconium for use in producing composite cladding tubes for nuclear fuel. The internal zirconium cladding is rendered suitable for ultrasound monitoring of its thickness by an appropriate thermomechanical treatment which takes place during one or more of the production steps for said blank. The aim is to adjust the grain size to an ASTM index of between 9 and 12 for the zircaloy 2 and between 6 and 10 for the unalloyed zirconium, retaining a grain size difference between the zircaloy 2 and the unalloyed zirconium of at least 2 ASTM index numbers.

REFERENCES:
patent: 4294631 (1981-10-01), Anthony et al.
patent: 4390497 (1983-06-01), Rosenbaum et al.
patent: 4671826 (1987-06-01), Prizzi
patent: 5223206 (1993-06-01), Rosenbaum

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