Estimation of core-damage frequency to evolutionary ALWR (advanced light water reactor) due to seismic initiating events: Task 4. 3. 3

Technical Report · Sun Apr 01 00:00:00 EST 1990

DOI:https://doi.org/10.2172/7175734· OSTI ID:7175734

Brooks, R D ^[1]; Harrison, D G ^[2]; Summitt, R L ^[3]

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1. TENERA, L. P., Knoxville, TN (USA)
2. Pacific Northwest Lab., Richland, WA (USA)
3. Safety and Reliability Optimization Services, Inc., Knoxville, TN (USA)

The Electric Power Research Institute (EPRI) is presently developing a requirements document for the design of advanced light water reactors (ALWRs). One of the basic goals of the EPRI ALWR Requirements Document is that the core-damage frequency for an ALWR shall be less than 1.0E-5. To aid in this effort, the Department of Energy's Advanced Reactor Severe Accident Program (ARSAP) initiated a functional probabilistic risk assessment (PRA) to determine how effectively the evolutionary plant requirements contained in the existing EPRI Requirements Document assure that this safety goal will be met. This report develops an approximation of the core-damage frequency due to seismic events for both evolutionary plant designs (pressurized-water reactor (PWR) and boiling-water reactor(BWR)) as modeled in the corresponding functional PRAs. Component fragility values were taken directly form information which has been submitted for inclusion in Appendix A to Volume 1 of the EPRI Requirements Document. The results show a seismic core-damage frequency of 5.2E-6 for PWRS and 5.0E-6 for BWRs. Combined with the internal initiators from the functional PRAs, the overall core-damage frequencies are 6.0E-6 for the pwr and BWR, both of which satisfy the 1.0E-5 EPRI goal. In addition, site-specific considerations, such as more rigid components and less conservative fragility data and seismic hazard curves, may further reduce these frequencies. The effect of seismic events on structures are not addressed in this generic evaluation and should be addressed separately on a design-specific basis. 7 refs., 6 figs., 3 tabs.

• Research Organization: EG and G Idaho, Inc., Idaho Falls, ID (United States); TENERA, L. P., Knoxville, TN (USA)
• Sponsoring Organization: DOE/NE
• DOE Contract Number: AC07-76ID01570
• OSTI ID: 7175734
• Report Number(s): DOE/ID-10245; MISC-89070; ON: DE90010861; TRN: 90-016044
• Country of Publication: United States
• Language: English

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