Commissariat a L'energie Atomique

Framatome Gmbh

S.n.c. Uranium Pechiney Et Framatome

Jacques Decours

Jean-Paul Mardon

Jean Gavinet

Michel Weisz

Jean Le Pape

Jacques Pelchat

The present invention relates to a method of manufacturing tubes for a nuclear fuel element sheath, comprising a plurality of successive cold rolling and annealing steps including a final .beta. phase heat treatment consisting of maintaining said tube at a temperature between 950.degree. C. and 1250.degree. C. for a time duration sufficient for obtaining a homogeneous .beta. phase within and throughout the whole thickness of said tube, and rapidly cooling said tube to ambient temperature for retaining said .beta. phase throughout the whole thickness of said tube during subsequent cold processing steps including final cleaning of the tube.

Method of manufacturing a zirconium-based alloy tube for a nuclear fuel

The sealing device comprises two interengaged members forming a clearance space in which is imprisoned a deformable seal for ensuring pressure-tightness between the members and the internal surface of the press chamber. The member which is in contact with the liquid medium under hydrostatic pressure comprises means for establishing pressure equilibrium within the press chamber and within the clearance space immediately after deformation of the seal.

Sealing device for an extrusion press or a compacting press

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Arpajon, France

Jacques Decours