Anticipated transients without scram for light water reactors. Volume 3. Staff report

Technical Report · Fri Dec 01 04:00:00 EST 1978

OSTI ID:6071307

On the basis of new information, the NRC staff reevaluated recommendations in the first two volumes of NUREG-0460. The staff now believes that a numerical safety objective is not satisfactory for use in nuclear regulatory decision-making at this time, although quantitative risk assessments are valuable supplements to the engineering evaluation and judgment of the appropriateness of alternative plant modifications for ATWS. This volume considers alternative plant modifications for ATWS, ranging from none to those needed to satisfy the criteria in NUREG-0460, Volumes 1 and 2. The corresponding degrees of assurance of safety the modifications are judged to provide were analyzed. The staff has selected a mix of ATWS prevention and mitigation measures for several classes of nuclear power plants that will provide an acceptable level of safety. Subject to confirmatory generic analyses, the staff has concluded, for plants now operating or under construction, that these measures would provide substantial additional protection which is required for the public health and safety.

• Research Organization: Nuclear Regulatory Commission, Washington, DC (USA)
• OSTI ID: 6071307
• Report Number(s): PB-289543
• Country of Publication: United States
• Language: English

Related Subjects

22 GENERAL STUDIES OF NUCLEAR REACTORS
220900* -- Nuclear Reactor Technology-- Reactor Safety
ACCIDENTS
ATWS
REACTOR ACCIDENTS
REACTOR PROTECTION SYSTEMS
REACTORS
RECOMMENDATIONS
RISK ASSESSMENT
WATER COOLED REACTORS