Integrated Risk-Informed Design (I-RID) methodological framework and computational application for FLEX equipment storage buildings of Nuclear Power Plants

Grant Schumock, Sai Zhang, Pegah Farshadmanesh, Jesse Gardner Owens, Nicolette Kasza, James Stearns, Tatsuya Sakurahara, Zahra Mohaghegh

Research output: Contribution to journalArticle

Abstract

In this research, an Integrated Risk-Informed Design (I-RID) methodological framework is developed for generating and evaluating design options for Nuclear Power Plant (NPP) structures and for providing plant decision makers with a quantitative comparison among design options based on multiple decision criteria, e.g., safety risk and cost. In the I-RID framework, simulations of underlying failure mechanisms are integrated with Probabilistic Risk Assessment (PRA) (consisting of event trees and fault trees) and a cost assessment model in a unified framework. The failure mechanisms are simulated by conducting Finite Element Analysis (FEA), and a probabilistic interface between FEA and the existing plant PRA is generated using structural reliability techniques. A causal model for cost assessment is developed, which allows for the modeling of multi-layer causal relationships among underlying contributing factors and, therefore, creates an explicit connection between cost and safety risk outputs. This paper applies the I-RID framework to the design of a storage building for the Diverse and Flexible Coping Strategies (FLEX) equipment in an NPP subjected to a potential tornado impact. Over two hundred design options are generated and evaluated, and three suggested design options with the lowest values of safety risk and cost are identified.

Original languageEnglish (US)
Article number103186
JournalProgress in Nuclear Energy
Volume120
DOIs
StatePublished - Feb 2020

Keywords

  • Diverse and flexible coping strategies (FLEX)
  • Integrated Risk-Informed Design (I-RID)
  • Nuclear power plant
  • Probabilistic Risk Assessment (PRA)
  • Tornado-resistant structural design

ASJC Scopus subject areas

  • Nuclear Energy and Engineering
  • Safety, Risk, Reliability and Quality
  • Energy Engineering and Power Technology
  • Waste Management and Disposal

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