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Development of Multi-Purpose PSA Model for Regulatory Uses (PSAM-0407)

Excerpt

In the field of a nuclear safety, probabilistic safety assessments (PSAs) have been applied to make meaningful risk-informed decisions. In order to be more risk-informed approach in a regulatory authority, there is a growing need for fundamentals on risk evaluation model. Especially, if a regulator wants to have the assurance whether or not good performance of any nuclear facilities has been preserved and to perform the verification of their operational safety, it is recommended that the regulatory organization prepare verification tools following the state-of-the-art technology for every technical areas and keep up the capability for independent assessment. For the purpose of keeping up the request in view of regulatory basis of risk evaluation, we have developed a regulatory PSA model, independent on the conservative PSA model of the licensee. The model, as named MPAS (multipurpose probabilistic analysis of safety) is primarily based on the result of feasibility study for adopting ASME PSA standard. The development of MPAS model consists of plenty of works establishing overall items which comprehensively implement all subjects such as detailed logic and information database system for each analysis fields. In addition, relevant computational framework utilizing PSA and risk monitoring codes has been also provided for users' convenience.

  • Abstract
  • Introduction
  • Overview of MPAS Model
  • Framework Development
  • Current Version and Further Enhancements
  • Conclusions
  • References
  • Introduction

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