I-PRA RISK- AND COST-INFORMED DECISION-MAKING ALGORITHM FOR NUCLEAR POWER PLANTS

Sari Alkhatib, Tatsuya Sakurahara, Seyed Reihani, Ernest Kee, Zahra Mohaghegh

Research output: Contribution to conferencePaperpeer-review

Abstract

To assist Nuclear Power Plants (NPPs) in achieving a reduction in costs while maintaining an adequate level of reliability and safety, a publication by some of the authors of this paper proposed a two-step risk-informed strategy, including (i) the streamlined approach and (ii) the advanced approach, which helps address emergent safety concerns and/or enhances enterprise risk management. The streamlined approach is a bounding risk-informed method to demonstrate compliance with regulatory requirements. The advanced approach considers a higher degree of explicit incorporation of temporal and spatial aspects in order to operationalize underlying failure phenomena models associated with events in Probabilistic Risk Assessment (PRA). To facilitate efficient execution of the advanced approach in addressing emergent safety concerns for NPPs, the researchers developed an Integrated Probabilistic Risk Assessment (I-PRA) decision-making algorithm. This paper extends that I-PRA algorithm, creating an I-PRA risk- and cost-informed decision-making algorithm, which has two additional features: (i) it includes the streamlined and advanced approaches in a unified decision making platform that allows an efficient and gradual increase of the degree of realism within a broader spectrum from bounding assumptions to the required higher resolutions; and (ii) it accounts for the costs associated with the risk-informed approaches in addition to considering regulatory safety criteria. The feasibility and value of the new algorithm are demonstrated by conducting a Fire PRA case study.

Original languageEnglish (US)
Pages390-398
Number of pages9
DOIs
StatePublished - 2021
Event2021 International Topical Meeting on Probabilistic Safety Assessment and Analysis, PSA 2021 - Virtual, Online
Duration: Nov 7 2021Nov 12 2021

Conference

Conference2021 International Topical Meeting on Probabilistic Safety Assessment and Analysis, PSA 2021
CityVirtual, Online
Period11/7/2111/12/21

Keywords

  • Integrated PRA (I-PRA)
  • Nuclear Power Plants
  • Probabilistic Risk Assessment (PRA)
  • Risk- and Cost-Informed Decision-Making
  • Screening Approach

ASJC Scopus subject areas

  • Statistics, Probability and Uncertainty
  • Nuclear Energy and Engineering
  • Statistics and Probability
  • Safety, Risk, Reliability and Quality

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