Development of fault displacement PRA methodology and its application to a hypothetical NPP

•We develop a method to evaluate CDF against fault displacement.•We evaluate CDF at a hypothetical PWR NPP based on public information.•We confirm the feasibility of the method through the evaluation for dip-slip fault and strike-slip fault.•We grasp important accident scenarios and uncertainty fact...

Full description

Saved in:
Bibliographic Details
Published in:Nuclear engineering and design 2020-05, Vol.361, p.110433, Article 110433
Main Authors: Haraguchi, Ryusuke, Tanaka, Futoshi, Ebisawa, Katsumi, Sakai, Toshiaki, Tsutsumi, Hideaki, Yuyama, Ayumi, Sato, Kunihiko, Mihara, Yoshinori, Nikaido, Yuji, Yoshida, Shinichi
Format: Article
Language:English
Subjects:
Concept of methodology application
Damage detection
Dip-slip fault
Event tree analysis
Fault displacement PRA methodology
Fault trees
Geological faults
Hypothetical NPP
Improvement of methodology
Methodology
Nuclear power plants
Probabilistic methods
Probabilistic risk assessment
Risk assessment
Slip
Strike-slip fault
Uncertainty
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:•We develop a method to evaluate CDF against fault displacement.•We evaluate CDF at a hypothetical PWR NPP based on public information.•We confirm the feasibility of the method through the evaluation for dip-slip fault and strike-slip fault.•We grasp important accident scenarios and uncertainty factors.•We show improvement measures of the uncertainty factors. The authors have developed fault displacement (FD) probabilistic risk assessment (PRA) methodology, through application to a hypothetical nuclear power plant (NPP). Core damage frequency (CDF) and its uncertainty of a hypothetical NPP for dip-slip faults and strike-slip faults were evaluated using a probabilistic FD hazard, FD fragilities of building and components, and fault tree and event tree models. Important initiating events, accident sequences, components and structure failures, as well as the range of FD that characterize the core damage risk profile were identified. Through the study, the authors confirmed the feasibility of the methodology, and also identified the important source of uncertainties within the methodology that require further development. Risk insights obtained from the FD PRA can be used to investigate countermeasures to reduce the FD risk.
ISSN:0029-5493
1872-759X
DOI:10.1016/j.nucengdes.2019.110433