Numerical Analysis for Hydrogen Flame Acceleration during a Severe Accident Initiated by SBLOCA in the APR1400 Containment

We performed a hydrogen combustion analysis in the Advanced Power Reactor 1400 MWe (APR1400) containment during severe accident initiated by small break loss of coolant (SBLOCA) which occurred at lower part cold leg using multi-dimensional system (MHAS) to confirm integrity APR1400 containment. The MHAS was developed combining MAAP, GASFLOW, and COM3D simulate release, distribution nuclear power plant accidents reactor. calculated peak pressure due flame acceleration COM3D, GASFLOW results as an initial condition distribution, approximately 555 kPa, is than fracture 1223 kPa To induce higher resulted from strong containment, we intentionally assumed several things developing scenario SBLOCA. Therefore, may judge that can be maintained even though occurs