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Combining mechanistic best-estimate analysis and level 1 probabilistic risk assessment

Authors
Journal
Reliability Engineering & System Safety
0951-8320
Publisher
Elsevier
Publication Date
Volume
39
Issue
1
Identifiers
DOI: 10.1016/0951-8320(93)90151-n

Abstract

Abstract Traditionally, both deterministic and probabilistic methods have been used in the safety analysis of nuclear reactors. Both of these methods have evolved in recent years to a more sophisticated treatment of uncertainties in the anallyis. In particular, deterministic analysts have moved away from the traditional conservative methods to best-estimate techniques that attempt to account for uncertainties in all phases of the calculations. Because of this, a tighter and more formal coupling between the deterministic and probabilistic methods has become possible. This paper introduces a formal methodology for such combination, presents an illustrative example, and discusses a new technique for deriving acceptance criteria for deterministic analyses based on probabilistic considerations.

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