' K 9 ) / 9 6 3-- Calibration of a Fission Gas Monitor *


A method for calibrating beta-sensitive gas-monitoring equipment is presented which avoids precise mixing of concentrated active gases with diluent air This method depends upon ntutron activation of the argon in P10 proportional counting gas L d passage ofthe active gas s u e v e l y through the monitor chamber and a proportional counter chamber. The latter serves for the determination of specific activity of the monitor gas. The method is satisfactory for specific activities corresponding approximately to maximum permissible concentration (MPC) levels.


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