「作業環境測定：空気中放射性物質濃度」に関するアンケート調査（第２報）

概要

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Radioisotope concentrations in air in radioisotope working area were surveyed by questionnaire. 108 concentration data for 10 radionuclides were obtained from 13 radioisotope facilities. The aggregate analysis shows that all the data were less than the concentration limits regulated for radioisotope workplaces. Radioisotope concentrations in air exceeding the detection limits were observed in 10 of 51 data obtained by sampling during handling radioisotopes. For measurements before and after handling, the detection rates were 0 and 3%, respectively. For limited 3H, 35S, and 125I, the detection rates were 57, 40, and 19%, respectively, during handling each radioisotope. The concentrations exceeded the detection limits were observed, but almost all data were apparently less than 1/100 of the concentration limits regulated for the respective nuclides in radioisotope workplaces.
日本放射線安全管理学会の論文