Energia i regulacje · 19.10.1994

Shutdown and Low-Power Operations for Nuclear Power Reactors

The Nuclear Regulatory Commission (NRC) is proposing to amend its regulations to require power reactor licensees to: Assure that uncontrolled changes in reactivity, reactor coolant inventory, and loss of subcooled state in the reactor coolant system when subcooled conditions are normally being maintained, will not occur when the plant is in either a shutdown or low power condition; assure that containment integrity is maintained or can be reestablished in a timely manner as needed to prevent releases in excess of the current limits in the regulations when the plant is in either a shutdown or low power condition; establish controls in technical specifications limiting conditions for operation and surveillance requirements or plant procedures required by technical specifications administrative controls for equipment which the licensee identifies as necessary to perform their safety function when the plant is in a shutdown or low power condition; evaluate realistically the effect of fires stemming from activities conducted during cold shutdown or refueling conditions, determine whether such fires could realistically prevent accomplishment of the normal decay heat removal capability, a