Passive cooling system for loop-type top entry liquid metal cooled reactors

摘要

A liquid metal cooled nuclear fission reactor plant (10) having a top entry loop (48) joined satellite assembly with a passive auxiliary safety cooling system (60,32,84,64) for removing residual heat resulting from fuel decay during shutdown, or heat produced during a mishap. This satellite type reactor plant is enhanced by a backup or secondary passive safety cooling system (72,80) which augments the primary passive auxiliary cooling system when in operation, and replaces the primary cooling system when rendered inoperative.