Tornado wind-loading requirements based on risk assessment techniques
Regulations require that nuclear power plants be protected from tornado winds. If struck by a tornado, a plant must be capable of safely shutting down and removing decay heat. Probabilistic techniques are used to show that risk to the public from the US Department of Energy (DOE) SP-100 reactor is acceptable without tornado hardening parts of the secondary system. Relaxed requirements for design wind loadings will result in significant cost savings. To demonstrate an acceptable level of risk, this document examines tornado-initiated accidents. The two tornado-initiated accidents examined in detail are loss of cooling resulting in core damage and loss of secondary system boundary integrity leading to sodium release. Loss of core cooling is analyzed using fault/event tree models. Loss of secondary system boundary integrity is analyzed by comparing the consequences to acceptance criteria for the release of radioactive material or alkali metal aerosol. 4 refs., 4 figs.
- Research Organization:
- Westinghouse Hanford Co., Richland, WA (United States)
- Sponsoring Organization:
- USDOE; USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC06-87RL10930
- OSTI ID:
- 5573194
- Report Number(s):
- WHC-SA-1229; CONF-9110122-1; ON: DE91016392
- Resource Relation:
- Conference: Natural phenomena hazards mitigation conference, St. Louis, MO (United States), 15-18 Oct 1991
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
SPACE POWER REACTORS
DYNAMIC LOADS
RISK ASSESSMENT
TORNADOES
WIND
AFTER-HEAT REMOVAL
CONTAINMENT
FAILURE MODE ANALYSIS
HEAT TRANSFER
HYDRAULICS
LOSS OF COOLANT
PUBLIC HEALTH
RADIATION DOSES
RADIOACTIVE EFFLUENTS
REACTOR COOLING SYSTEMS
REACTOR SAFETY
SODIUM
ACCIDENTS
ALKALI METALS
COOLING SYSTEMS
DISASTERS
DOSES
ELEMENTS
ENERGY SYSTEMS
ENERGY TRANSFER
FLUID MECHANICS
MATERIALS
MECHANICS
METALS
MOBILE REACTORS
POWER REACTORS
RADIOACTIVE MATERIALS
RADIOACTIVE WASTES
REACTOR ACCIDENTS
REACTOR COMPONENTS
REACTORS
REMOVAL
SAFETY
STORMS
SYSTEM FAILURE ANALYSIS
SYSTEMS ANALYSIS
WASTES
220900* - Nuclear Reactor Technology- Reactor Safety
210600 - Power Reactors
Auxiliary
Mobile Package
& Transportable