貯留槽からの外部実効線量率の新しい計算方法

概要

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In this paper we propose a new method of calculating effective dose rate from the radioisotope reservoir tank. A shielding effect is expected with the absorption of water. Our new shielding calculation method assumed a uniform distribution of radioactivity in the reservoir tank, and the reservoir tank was divided into small volumes. The effective dose rate then was calculated from the center of the small volume to the evaluation point. The shielding calculation used the effective dose rate constant of the nuclide and the effctive dose transmission rate of water. Change in the size of the reservoir tank and change in the distance from the surface of the tank to the evaluation point were used to make tables for each nuclide with 1 GBq of radioactivity. In this calculation, the shielding effect was great when the size of the tank was increased and with low-energy gamma-ray emission nuclides. This new method of calculation makes it easy to determine the effective dose rate.
公益社団法人日本放射線技術学会の論文
2001-09-20