[2I01-09] PRA Method 2

11:00 AM - 11:15 AM JST(2:00 AM - 2:15 AM UTC)

[2I07] The importance of correlation considerations in seismic risk accident sequence assessmentPart 2 Sensitivity of response correlations to seismic risk

*Hitoshi Muta¹, Yasuki Ohtori¹ (1. Tokyo City University)

Keywords:

Seismic Risk,Accident sequence analysis,Correlation,Core Damage Frequency,Sensitivity

In the accident sequence assessment of seismic risk in actual nuclear power plants, the correlation among SSCs are considered to have a significant impact on the results of the core damage frequency. However, there are no quantitative examples of such sensitivity, and it is very difficult to assess the accuracy of the risk assessment. The purpose of this paper is to evaluate the sensitivity of the correlation coefficients of component responses to seismic risk using a PRA model of an actual plant, to show the degree of influence, and to obtain knowledge that contributes to seismic safety.