[1D13-17] External Event PRA 2

[1D15] The importance of correlation considerations in seismic risk accident sequence assessment

*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 for real nuclear plants, the concept of considering the correlation of equipment damage and the assumption of the target range are considered to have a significant impact on the results of core damage frequency, but there are no examples to quantitatively show the sensitivity of this, and the consistency of accuracy between the purpose of risk assessment and the required assessment is However, there are no quantitative examples to show the sensitivity of this, and it is very difficult to judge the consistency of accuracy between the purpose of risk assessment and the required assessment. This paper aims to contribute to seismic safety by clarifying the sensitivity to seismic risk under different correlation conditions through a case study of a real plant PRA model.