Patents by Inventor Jean Lallement

Jean Lallement has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Liquid sodium cooled fast reactor
    Patent number: 4056438
    Abstract: 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 The other branch which is nearest the main vessel wall is supplied with part of the cold sodium which has been withdrawn from the intervessel zone by means of pumps and reinjected into the bottom of the reactor core.
    Type: Grant
    Filed: July 15, 1976
    Date of Patent: November 1, 1977
    Assignee: Commissariat a l'Energie Atomique
    Inventors: Jean-Michel Gama, Jean Lallement, Lucien Pugnet
  • Structure for reducing convection currents within the pressure vessel of a fast reactor
    Patent number: 4043867
    Abstract: 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.
    Type: Grant
    Filed: August 28, 1975
    Date of Patent: August 23, 1977
    Assignee: Commissariat a l'Energie Atomique
    Inventors: Jean-Pierre Benque, Jean Lallement, Paul Lambert