Safety margins confidence estimation for a passive residual heat removal system

Enrico Zio, Francesco Di Maio and Jiejuan Tong

Reliability Engineering and System Safety, 2010, vol. 95, issue 8, 828-836

Abstract: For licensing purposes, safety cases of nuclear power plants (NPPs) must be presented at the Regulatory Authority with the necessary confidence on the outcomes of the models used to analyze the plant safety behavior. In the present work, we consider the problem of providing a quantitative indication of the confidence in the safety margin estimation by a model with uncertain inputs giving in output the maximum outlet water temperature of the residual heat removal system (RHRs) in accident scenarios of the high temperature reactor-pebble modular (HTR-PM). The quantitative evaluation is carried out by means of a computational procedure of literature, based on order statistics (OS). The procedure is analyzed with respect to some of its key parameters defining the sample size and the number of uncertain inputs.

Keywords: Uncertainty; Safety margins; Order statistics; Passive safety systems; High temperature reactor pebble modular (search for similar items in EconPapers)
Date: 2010
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Citations: View citations in EconPapers (12)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:reensy:v:95:y:2010:i:8:p:828-836

DOI: 10.1016/j.ress.2010.03.006

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