Commissariat a L'energie Atomique

Jean Lallement

Paul Lambert

Jean-Michel Gama

Lucien Pugnet

Jean-Pierre Benque

A set of cylindrical shells is interposed between the main vessel wall of an integrated sodium-cooled fast reactor and the primary core containment vessel so as to form a siphon having two downwardly directed branches. One branch opens into the intervessel zone which is separated from the primary vessel by a shell. The other branch which is nearest the main vessel wall is supplied with part of the cold sodium which has been withdrawn from the intervessel zone by means of pumps and reinjected into the bottom of the reactor core.

Liquid sodium cooled fast reactor

A hollow metallic ring structure is secured to the periphery of the diagrid support and located within an internal annular space formed between the lateral neutron shield of the reactor core and an inner tank placed within a primary vessel. The ring structure is smaller in width than the annular space, has a maximum height equal to that of the reactor core, and is provided with partition-walls and holes for producing pressure drops and reducing convection currents.

Growing community of inventors

Verrieres-le-Buisson, France

Jean Lallement