RESPIRATOR/FILTER FOR REMOVING WATER CONTAINING TRITIUM

摘要

PURPOSE: To obtain a filtering unit with a size required to assure a minimum protection period as well as large removing ratio of thorium and large volume by selecting a thorium filtering medium from a group consisting of granular activated carbon and granular silica gel and having a specified water content of the tritium medium and a specified range of granularity CONSTITUTION: A housing 10 for a filtering unit of an respirator to remove water containing thorium is formed in a vessel type or a cartridge type. The housing 10 has an inlet 12 and an outlet 14. The outlet 14 is mounted easily on a standard face part used in an artificial respirator for tritium by means of a circumferential screw 16. A filtering chamber 17 is arranged between the inlet 12 and the outlet 14. The filtering chamber 17 is formed by an inner housing wall 18, an upper filter cover 19 and a separator 21. The filtering chamber has a volume sufficient to maintain a filtering material 30 of 110-500cc. A tritium filtering medium is selected from granular activated carbon and granular silica gel. The medium has a water content of about 25-40wt.%, and a granularity within a range of 6×20-12×30.