FILTER VENT CONTAINER FOR REMOVING RADIOACTIVE SUBSTANCE

PURPOSE:To obtain a highly efficient filter vent container which is free from deformation and where the discharge of condensed water drops is increased by using a filter with a specific fiber diameter and filling density, and incorporating into the filter vent container a small filter unit made by combining the filter with wire netting or filters shaped like woven cloth. CONSTITUTION:A filter cartridge 12 is inserted into a support ring 14 installed inside a filter vent container 7 and is tightened with screave bolts or others. The cartridge 12 is constituted by combining many small filter units 15. In other words, the small filter units 15 are arranged squarely and exhaust gas ducts are made between two layers of the units 15. Radioactive substances contained in a gas flowing from the outside into the container are removed by passing them through filters filled in the units 15, and then the purified gas is directed to flow out from the exhaust gas duct to the upper part of the container. The fiber diameter of the filter used for the container is set at 5 to 12mum, and the filling density at 100 to 300kg/m .