Cooldown criteria for light water reactors

This Standard provides design criteria for systems and equipment necessary for the performance of those nuclear safety functions that are required to achieve and maintain a safe shutdown of the reactor to cold shutdown conditions from a hot standby or post accident condition. The following nuclear safety functions are addressed in this Standard: (1) reactivity control; (2) reactor coolant system heat removal; and (3) reactor coolant system integrity, i.e., pressure control, and inventory control. This Standard provides criteria for the design of systems used to accomplish these functions