Regulatory/backfit analysis for the resolution of Unresolved Safety Issue A-44, Station Blackout

Technical Report · Wed Jun 01 04:00:00 EDT 1988

OSTI ID:5049734

Rubin, A M

Station blackout is the complete loss of alternating current (ac) electric power to the essential and nonessential buses in a nuclear power plant; it results when both offsite power and the onsite emergency ac power systems are unavailable. Because many safety systems required for reactor core decay heat removal and containment heat removal depend on ac power, the consequences of a station blackout could be severe. Because of the concern about the frequency of loss of offsite power, the number of failures of emergency diesel generators, and the potentially severe consequences of a loss of all ac power, ''Station Blackout'' was designated as Unresolved Safety Issue (USI) A-44. This report presents the regulatory/backfit analysis for USI A-44. It includes (1) a summary of the issue, (2) the recommended technical resolution, (3) alternative resolutions considered by the Nuclear Regulatory Commission (NRC) staff, (4) an assessment of the benefits and costs of the recommended resolution, (5) the decision rationale, (6) the relationship between USI A-44 and other NRC programs and requirements, and (7) a backfit analysis demonstrating that the resolution of USI A-44 complies with the backfit rule (10 CFR 50.109).

• Research Organization: Nuclear Regulatory Commission, Washington, DC (USA). Office of Nuclear Regulatory Research
• OSTI ID: 5049734
• Report Number(s): NUREG-1109; ON: TI88011263
• Country of Publication: United States
• Language: English

Related Subjects

22 GENERAL STUDIES OF NUCLEAR REACTORS
220900* -- Nuclear Reactor Technology-- Reactor Safety
BLACKOUTS
COST BENEFIT ANALYSIS
DIESEL ENGINES
ELECTRIC GENERATORS
ENERGY LOSSES
ENGINEERED SAFETY SYSTEMS
ENGINES
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
LOSSES
NUCLEAR FACILITIES
NUCLEAR POWER PLANTS
POWER LOSSES
POWER PLANTS
REACTOR PROTECTION SYSTEMS
REACTOR SAFETY
SAFETY
THERMAL POWER PLANTS