The design of a Filtered Containment Venting System

摘要

Following the Fukushima-accident a large amount of radioactive fission products were released into the environment. These emissions could have been reduced if an FCVS (Filtered Containment Venting System) had been present. The Belgian nuclear power plants at Tihange 1-2-3 and Doel 3-4 have been equipped with an FCVS for which KSB has installed TRIODIS triple offset butterfly valves. Following the Fukushima accident, regulatory agencies have requested that nuclear power plants should be fitted with filtered vent systems, to enable containment systems to be safely depressurized and filtered in the event of a severe nuclear accident. This is because should an accident occur, the containment system may be subject to overpressure from steam formation or non-condensable gas generation.