A Formal Integration of the Decoupled Level 1 and 2 PSA Models into a Single Operational Model for Risk-informed Applications
- Korea Atomic Energy Research Institute, Dukjin-dong, Yuseong-gu, Daejeon, 305-353 (Korea, Republic of)
This paper provides a formal approach for integrating systematically the decoupled Level 1 and 2 PSA models that are developed sequentially and different in nature into a single PSA model for risk-informed applications. With this, a change of the Level 1 events can be directly reflected in the Level 2 model and thus the plant is able to evaluate easily the risk associated with important operational issues at the system and component level. Its fundamental concept is the direct propagation of the Level 1 core damage sequence cut-sets into the Level 2 model so that they are directly linked to the Level 2 risk metrics (such as LERF and LLRF) as well as the Level 2 accident sequences. The practical implementation of the approach is made through a sequential integration of the matrix functions that would be made at successive stages for the Level 2 risk calculation. Then the final result of the integration process is given as a type of Boolean function for the Level 1 core damage sequences (or cut-sets) solution of each PDS and PDS solution of the Level 2 CET sequences and the release frequencies, leading to no essential difference in results obtained from the conventional Level 2 PSA approach. (authors)
- Research Organization:
- American Nuclear Society, 555 North Kensington Avenue, La Grange Park, IL 60526 (United States)
- OSTI ID:
- 21016360
- Resource Relation:
- Conference: 2006 International congress on advances in nuclear power plants - ICAPP'06, Reno - Nevada (United States), 4-8 Jun 2006; Other Information: Country of input: France; Related Information: In: Proceedings of the 2006 international congress on advances in nuclear power plants - ICAPP'06, 2734 pages.
- Country of Publication:
- United States
- Language:
- English
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