Operating experience with two types of Kanne ionization chambers is described. These chambers are used to monitor gaseous radioactive B-emitting contaminants released during the operation of heavy-water moderated reactors at the Savannah River Plant. Calibration results, y-sensitivity, the effects of B-energy on chamber sensitivity, and the effects of such variables as temperature, pressure and humidity on the operating characteristics of these chambers are discussed.

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A thermoluminescent dosimeter using two 'LiF chips was developed to monitor penetrating and nonpenetrating components of personnel radiation exposures. Thermoluminescent dosimeters are more accurate, are less energy dependent, have a wider range of sensitivity, and are simpler to use than film dosimeters.The present thermoluminescent dosimeter system at Savannah River is manually operated, but it can be automated.-2 -Introduction .

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