Commissariat a L'energie Atomique

Maurice Perona

Robert Venot

Jean Lleres

Jean-Paul Martin

Rene Jullien

The system comprises an assembly of uniformly spaced horizontal plates extending parallel to a horizontal closure surface, an outer shell and a thick bottom plate suspended from the horizontal surface by means of spaced suspension members attached to the horizontal surface and to the thick plate respectively. The thick plate supports stacked metallic plates held in spaced relation and protected by a lateral shell which is capable of free expansion at the upper extremity and joined to said thick plate in leak-tight manner.

System for the heat insulation of horizontal closure surfaces for a

In a sodium-cooled fast reactor comprising a reactor tank and diagrid, a core support grid carried by the reactor diagrid and a number of pipes each supplying the support grid with liquid sodium coolant through a bellows seal, the reactor diagrid is constituted by a rigid annular structure having a flat annular bearing face resting on an annular bearing face of the core support grid. High flexural rigidity of the support grid is provided by strengthening ribs, by welded through-passage columns for the fuel elements and by a raised peripheral framework mounted on the support grid for carrying the shield system.

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Varces Allieres & Risset, France

Maurice Perona