APPLICATION OF PASSIVE AUTOCATALYTIC RECOMBINER IN NUCLEAR POWER PLANT UNDER SEVERE ACCIDENTS

Abstract

Passive Autocatalytic Recombiner (PAR) is a key safety equipment to mitigate the hydrogen risk in containment of Nuclear Power Plant (NPP). As we all know, PARs have been used to deplete hydrogen in Designed Basis Accidents due to the stable hydrogen depletion performance and flexible installation without power supply and manual operation. However, the application of PAR under Severe Accidents (SAs) have been got more and more attention. In some NPPs, PARs have been already required to be able to work in SAs. Therefore, the hydrogen depletion performance of PAR under SAs is very important for the design of hydrogen depletion system. In this work, first of all, the development of PAR research is overviewed briefly. Then the experiments, simulations or calculations under different conditions of SAs are described in detail, including the illustration of testing device or CFD model. The hydrogen depletion catalyst is also described from the perspective of catalyst preparation and characterization experiments. Finally, the future experiments or simulations which should be paid attention to are recommended.