Abstract
An analysis of archival data of liquid radioactive waste samples and Techa River bottom sediments was made, taking into consideration the radiochemical methods for extraction and beta-emitting radionuclide activity measurements existing in the early 1950s. It was stated that the radionuclide composition of the routine and accidental liquid radioactive waste releases in 19491951 corresponded to the radionuclide composition of the fission products accumulated in the nuclear reactor fuel and in the liquid radioactive waste storage tank, with operating modes typical for that time period in reactor and radiochemical plants. It was stated that the data obtained by Ilyin (1956) for the assessment of radionuclide composition and liquid radioactive-waste release rate in the Techa River were not correct, and for retrospective assessment of the population exposure dose for near-stream residents, this could result in substantial underassessment of the data obtained.
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