Evaluation of possible radiation exposures near the Semipalatinsk nuclear test site

To assess the external exposures that were likely received in villages near the Semipalantinsk nuclear test site in Kazakhstan, a dosimetry method consistent with available data is necessary. This paper presents calculations to estimate the integral external exposure by using two approaches: 1) historical exposure rate data, and 2) contemporary measurements of Cs-137 inventory in the soil. The input data and principal assumptions are discussed as well as estimates of integral exposure received in the village of Dolon as a result of a test conducted in August 1949. The estimated exposures measured by both methods were substantially less than those reported in the literature.