Passive cooling system for liquid metal cooled nuclear reactors with backup coolant flow path

摘要

A liquid metal cooled nuclear fission reactor plant (10) having a passive auxiliary safety cooling system (46),(48) for removing residual heat resulting from fuel decay during reactor shutdown, or heat produced during a mishap. This reactor plant (10) is enhanced by a backup or secondary passive safety cooling system (66) which augments the primary passive auxiliary cooling system when in operation, and replaces the primary system when rendered inoperable. IMAGE