Comparison of a Traditional Probabilistic Risk Assessment Approach with Advanced Safety Analysis
As part of the Light Water Sustainability Program (LWRS) [1], the purpose of the Risk Informed Safety Margin Characterization (RISMC) [2] Pathway research and development (R&D) is to support plant decisions for risk-informed margin management with the aim to improve economics, reliability, and sustain safety of current NPPs. In this paper, we describe the RISMC analysis process illustrating how mechanistic and probabilistic approaches are combined in order to estimate a safety margin. We use the scenario of a “station blackout” (SBO) wherein offsite power and onsite power is lost, thereby causing a challenge to plant safety systems. We describe the RISMC approach, illustrate the station blackout modeling, and contrast this with traditional risk analysis modeling for this type of accident scenario. We also describe our approach we are using to represent advanced flooding analysis.
- Research Organization:
- Idaho National Laboratory (INL)
- Sponsoring Organization:
- DOE - FE
- DOE Contract Number:
- AC07-05ID14517
- OSTI ID:
- 1173101
- Report Number(s):
- INL/CON-14-32494
- Country of Publication:
- United States
- Language:
- English
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