Proceedings of the Eighth International Conference on Probabilistic Safety Assessment & Management (PSAM)
Risk-Informed Decision Making: Risk-Informed Operations
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The PCSA Tool software has been developed to aid the U.S. Nuclear Regulatory Commission in reviewing a preclosure safety analysis of a potential high-level waste geologic repository. During the preclosure period (i.e., the period before permanent closure), the nuclear waste may be handled at the surface and subsurface facilities for receiving, repackaging, transporting, and emplacing. To ensure public and worker safety, the Yucca Mountain site-specific regulation 10 CFR Part 63 requires that the U.S. Department of Energy perform a preclosure safety analysis to demonstrate that a geologic repository can be designed and operated in compliance with the performance objectives. The PCSA Tool allows staff to perform independent confirmatory analyses to support the review of preclosure safety analysis and make a determination that a geologic repository can be designed and operated in accordance with the regulatory requirements. This paper discusses the review methodology and the PCSA Tool modules to support a risk-informed performance-based review. This paper also provides an example demonstrating the capabilities of the PCSA Tool. The PCSA Tool framework is general enough to allow its use in risk assessments for other nuclear facilities (e.g., power plants, fuel cycle facilities) that are not subjected to 10 CFR Part 63 requirements.