Sensitivity analysis on flammable gas dispersion and explosion in HTTR hydrogen production system with fire and explosion analysis code system -P2A- (Contract research)

Inaba, Yoshitomo  ; Nishihara, Tetsuo 

In this report, we investigated the effects of jet for the dispersion and explosion analysis of leaked gas, obstacles, position of an ignition point and cell size for the gas explosion analysis, and atmospheric stability for the dispersion analysis of the leaked gas, with PHOENICS, AutoReaGas, and AUTODYN. Then, we carried out two accident analyses about combustible fluid leakage based on the investigation results of these effects. As a result, it was shown that important buildings related to safety was hardly affected by the explosion of the leaked gas.