N Reactor external events probabilistic risk assessment
An external events probabilistic risk assessment of the N Reactor has been completed. The methods used are those currently being proposed for external events analysis in NUREG-1150. Results are presented for the external hazards that survived preliminary screening. They are earthquake, fire, and external flood. Core damage frequencies for these hazards are shown to be comparable to those for commercial pressurized water reactors. Dominant fire sequences are described and related to 10 CFR 50, Appendix R design requirements. Potential remedial measures that reduce fire core damage risk are described including modifications to fire protection systems, procedure changes, and addition of new administrative controls. Dominant seismic sequences are described. The effect of non-safety support system dependencies on seismic risk is presented. 7 refs., 2 figs., 1 tab.
- Research Organization:
- Westinghouse Hanford Co., Richland, WA (USA)
- Sponsoring Organization:
- DOE/DP
- DOE Contract Number:
- AC06-87RL10930
- OSTI ID:
- 5790807
- Report Number(s):
- WHC-SA-0753; CONF-8910192--14; ON: DE90001138
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
22 GENERAL STUDIES OF NUCLEAR REACTORS
220700 -- Nuclear Reactor Technology-- Plutonium & Isotope Production Reactors
220900* -- Nuclear Reactor Technology-- Reactor Safety
ACCIDENTS
CONTROL SYSTEMS
DAMAGE
DESIGN
DISASTERS
EARTHQUAKES
ENRICHED URANIUM REACTORS
EVALUATION
FIRE HAZARDS
FLOODS
GRAPHITE MODERATED REACTORS
HAZARDS
LWGR TYPE REACTORS
MANAGEMENT
MITIGATION
N-REACTOR
PLUTONIUM PRODUCTION REACTORS
POWER REACTORS
PRODUCTION REACTORS
REACTOR ACCIDENTS
REACTOR COMPONENTS
REACTOR CONTROL SYSTEMS
REACTOR CORES
REACTOR SAFETY
REACTORS
REMEDIAL ACTION
RISK ASSESSMENT
SAFETY
SEISMIC EFFECTS
SEISMIC EVENTS
STORMS
TORNADOES
WATER COOLED REACTORS
WIND