Study of Variations in Calibration Factor of a Charcoal Canister Based Passive 222Rn Detector with Relative Humidity

Abstract

Many active, passive measurement techniques are used to measure the 222Rn concentration around the world. The devices and detectors used for these techniques in India are most of the times factory calibrated or else calibrated in an accumulation kind of calibration chambers individually. Hence there is a need for simultaneous calibration of all these detectors at a single instant for various simulated conditions of 222Rn concentration, humidity and temperature. In the present study calibration method of charcoal based detector is discussed.