Proposal to Streamlined Measurement of Radioactivity in Working Environment Based on the Amount of Radioisotopes Handled
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概要
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All radiation facilities using unsealed radioisotopes are required to measure the concentration of radioactivity in indoor airborne every month on the basis of the"Industrial Safety and Health Law" and the"Ordinance on Prevention of Ionizing Radiation Hazards". The indoor concentrations of radioactive substances were also calculated from the actual amounts of radioisotopes handled in Nagasaki University. Both the calculation data and the measurement data in practice were extremely well below the control level and even lower than the detection limits. These results suggest that the evidence-based efforts should be made to relax the present regulations on measurements of indoor airborne radioactivity. The possible scenario of exemption rules are discussed and proposed here.
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