Abstract

The National Radiological Protection Board has a continuing interest in the development of thermoluminescence measurement techniques and has been using thermoluminescence dosemeters for the measurement of environmental gamma ray exposure in houses as part of a national indoor radiation survey. A number of other scientific laboratories within Europe are currently involved in similar studies or are using thermoluminescence dosemeters for the routine measurement of environmental exposure at reactor sites. Five such laboratories were invited to participate in an intercomparison study of the performance of thermoluminescence dosemeters for environmental measurements. Following completion of this exercise a further five laboratories were invited to participate in a second study. In both intercomparisons, the National Radiological Protection Board was responsible for the planning and administration of the exercise and acted as a clearing house for transport, temporary storage and distribution of the dosemeters. This paper describes the objectives, methodology and results of these international intercomparison exercises.

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