Apparatus for insulating hot sodium in pool-type nuclear reactors

摘要

Apparatus for insulating hot sodium in a reactor vessel in a pool-type nuclear reactor. The apparatus includes a flow isolated plenum in the reactor vessel for holding a stagnant quantity of sodium. The flow isolated plenum is located between a second plenum for holding hot sodium and the structural load bearing members of the reactor. The flow isolated plenum forms a thermally insulating field barrier between the hot sodium and the structural members.