Inert Gas Secondary Enclosure Clean-Up System

St 198 alloy is attractive for glovebox clean-up systems operating with nitrogen cover gases, offering good tolerance to impurities which may permeate into the box from the environment and stable sorption speeds for alloy loadings as high as 360 mCi/g. At this loading the tritium concentration in the stream leaving the scavenger bed will be of the order of 400 µCi/m³. The alloy operating conditions can be adjusted to increase the quantity of tritium stored in the alloy or to reduce the tritium concentration in the effluent. Methane can not be removed from a nitrogen stream with St 198. A glovebox clean-up system based on the use of this alloy is under evaluation.