To mitigate severe accidents (SAs) in nuclear power plants (NPPs), filtered containment venting system (FCVS) is designed to prevent the potential containment overpressure failure through the filtered venting process. So far, many investigations and research works have been initiated or resumed particularly about the reinforced FCVS, which is expected to become the standard configuration of most NPPs. The NPP safety regulation, the safety regulation of nuclear power plant design (HAF102) issued by the Chinese NNSA, requires that NPPs should have venting systems with adequate filtration. Now, either most NPPs of operating reactor units under construction or more units planned in China are going to be equipped with FCVS, with priority of Venturi scrubber type system. At present, major nuclear energy companies, research institutions and universities are initiating or accelerating research and engineering projects on FCVS designs with enhanced performance.
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