Evaluation of Station Blackout accidents at nuclear power plants. Technical findings related to Unresolved Safety Issue A-44. Draft report for comment

Technical Report · Wed May 01 00:00:00 EDT 1985

OSTI ID:5799707

Baranowsky, P. W.

''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 frequency 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.

• Research Organization: Nuclear Regulatory Commission, Washington, DC (USA)
• Sponsoring Organization: USNRC
• OSTI ID: 5799707
• Report Number(s): NUREG-1032-DRAFT; ON: TI85901551
• Country of Publication: United States
• Language: English

Related Subjects

22 GENERAL STUDIES OF NUCLEAR REACTORS
BLACKOUTS
NUCLEAR POWER PLANTS
REACTOR ACCIDENTS
AFTER-HEAT REMOVAL
DAMAGE
POWER LOSSES
POWER SUPPLIES
REACTOR CORES
REACTOR SAFETY
RELIABILITY
ACCIDENTS
ELECTRONIC EQUIPMENT
ENERGY LOSSES
EQUIPMENT
LOSSES
NUCLEAR FACILITIES
POWER PLANTS
REACTOR COMPONENTS
REMOVAL
SAFETY
THERMAL POWER PLANTS
220900* - Nuclear Reactor Technology- Reactor Safety