Liquid metal cooled fast breeder nuclear reactor

摘要

A liquid metal cooled fast breeder nuclear reactor comprising a fuel assembly supported on a diagrid and submerged in a pool of liquid metal coolant within a containment vessel. The diagrid is of triple component construction comprising a short cylindrical plenum mounted on a conical undershell and loosely embraced by a fuel store carrier. The plenum merely distributes coolant through the fuel assembly the load of the assembly being carried by the undershell by means of struts which penetrate the plenum. The fuel assembly, fuel store carrier and undershell provide secondary containment for the plenum.