[3B09-13] Light Water Reactor Safety Assessment

[3B11] Flood propagation analysis for internal flood PRA by using Apros code

(2)Results of flood propagation analysis for internal flood PRA

*Yoshikane Hamaguchi¹, Tomomichi Itoh¹, Tamio Koriyama¹ (1. Regulatory Standard and Research Department, Secretariat of Nuclear Regulation Authority(S/NRA/R))

Keywords:Probabilistic risk assessment, Apros, Internal flood, Flood propagation analysis

The flood propagation of internal flood PRA has been calculated by using Apros for a generic PWR plant. This calculation is focused on important flood sources and initiating events of internal event such as interfacing system LOCA, main feedwater piping rupture which are relatively high risk based on the internal flood PRA.