Preliminary Calculation on the Passive Autocatalytic Recombiner Analysis Model of Severe Accident Containment Analysis Package Code

Passive Autocatalytic Recombiner (PAR) is one of the ways to remove hydrogen by converting it into water vapor by using the catalytic reaction with oxygen. The characteristic of PAR, passive reaction, makes this mechanism possible without an electricity particularly, in the case of station black out of the NPP like Fukushima accident. After the accident, Korea has completed the installation of PAR at all NPPs in Korea as a hydrogen mitigation system. In Korea, severe accident analysis code has being developed since 2011. Severe Accident Containment Analysis Package (SACAP) is a part of this code to analyze an ex-vessel phenomena during a severe accident. SACAP also has PAR analysis model in it. In this paper preliminary calculation on a PAR performance was conducted using PAR analysis code of SACAP and compared with the test results as well. The preliminary calculation on the PAR performance test was conducted using CERACOMB PAR analysis model of SACAP and compared with the test results. The hydrogen removal rate shows similar trends comparing with the correlation. However, the time to activate and accelerate the performance of PAR in a code is needed to adjust to fit the results of the test.