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Title: Evaluation of station blackout accidents at nuclear power plants: Technical findings related to unresolved safety issue A-44: Final report

Evaluation of station blackout accidents at nuclear power plants: Technical findings related to unresolved safety issue A-44: Final report ''Station Blackout,'' which is the complete loss of alternating current (AC) electrical power in a nuclear power plant, has been designated as Unresolved Safety Issue A-44. 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. This report documents the findings of technical studies performed as part of the program to resolve this issue. The important factors analyzed include: the fequency of loss of offsite power; the probability that emergency or onsite AC power supplies would be unavailable; the capability and reliability of decay heat removal systems independent of AC power; and the likelihood that offsite power would be restored before systems that cannot operate for extended periods without AC power fail, thus resulting in core damage. This report also addresses effects of different designs, locations, and operational features on the estimated frequency of core damage resulting from station blackout events.
Publication Date:
OSTI Identifier:5122568
Report Number(s):NUREG-1032
ON: TI88011259
Resource Type:Technical Report
Data Type:
Research Org:Nuclear Regulatory Commission, Washington, DC (USA)
Country of Publication:United States
Language:English
Subject: 22 GENERAL STUDIES OF NUCLEAR REACTORS; BLACKOUTS; REACTOR ACCIDENTS; NUCLEAR POWER PLANTS; ENGINEERED SAFETY SYSTEMS; POWER LOSSES; PROGRESS REPORT; REACTOR PROTECTION SYSTEMS; RELIABILITY; RISK ASSESSMENT; ACCIDENTS; DOCUMENT TYPES; ENERGY LOSSES; LOSSES; NUCLEAR FACILITIES; POWER PLANTS; THERMAL POWER PLANTS 220900* -- Nuclear Reactor Technology-- Reactor Safety