Probabilistic risk assessment of the modular HTGR plant. Revision 1
A preliminary probabilistic risk assessment (PRA) has been performed for the modular HTGR (MHTGR). This PRA is preliminary in the context that although it updates the PRA issued earlier to include a wider spectrum of events for Licensing Basis Events (LBE) selection, the final version will not be issued until later. The primary function of the assessment was to assure compliance with the NRC interim safety goals imposed by the top-level regulatory criteria, and utility/user requirements regarding public evacuation or sheltering. In addition, the assessment provides a basis for designer feedback regarding reliability allocations and barrier retention requirements as well as providing a basis for the selection of licensing basis events (LBEs) and the safety classification of structures, systems, and components. The assessment demonstrates that both the NRC interim safety goals and utility/user imposed sheltering/evacuation requirements are satisfied. Moreover, it is not anticipated that design changes introduced will jeopardize compliance with the interim safety goals or utility/user requirements. 61 refs., 48 figs., 24 tabs.
- Research Organization:
- GA Technologies, Inc., San Diego, CA (United States)
- Sponsoring Organization:
- USDOE Assistant Secretary for Nuclear Energy, Washington, DC (United States)
- DOE Contract Number:
- AC03-84SF11963
- OSTI ID:
- 455545
- Report Number(s):
- DOE/HTGR--86-011-Rev.1; ON: DE97003993
- Country of Publication:
- United States
- Language:
- English
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DESIGN
DOSE RATES
EMERGENCY PLANS
EVACUATION
FAILURE MODE ANALYSIS
FISSION PRODUCT RELEASE
HTGR TYPE REACTORS
PUBLIC HEALTH
REACTOR ACCIDENTS
REACTOR COOLING SYSTEMS
REACTOR LICENSING
REACTOR SAFETY
REGULATIONS
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SEISMIC EFFECTS
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WHOLE-BODY IRRADIATION