Development of PWR Passive Autocatolytic Hydrogen Recombiners

Passive autocatalytic hydrogen recombiners（PAR） are mainly used for removing hydrogen in the containment of NPS and keeping the hydrogen concentration at explosion-safe level under severe accident. The PAR is designed according to the theory that catalytic reaction of H₂ and O₂, the catalytic plate of PAR is made of tPt\Pd catalyzer. According to requirements of the hydrogen removal under NPS severe accidents, put up series experiments on the PAR under the conditions of the different pressure、hydrogen concentration、temperature and The influence test of the different poisons on the catalytic plate and Verification Test of Start and Stop Threshold。The results of performance test indicate that the developed PAR meet the requirements of the NPS hydrogen removal, the development PAR can direct apply the GRE-Ⅱ NPS and the ERP、AP1000 NPS.