Radioactive gas diffusion simulation and inhaled effective dose evaluation during nuclear decommissioning

During the decommissioning of the nuclear facilities, the radioactive gases in pressure vessels may leak due to the demolition operations. The decommissioning site has large space, slow air circulation, and many large nuclear facilities, which increase the difficulty of workers' inhalation expo...

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Published inNuclear engineering and technology Vol. 54; no. 1; pp. 293 - 300
Main Authors Yang, Li-qun, Liu, Yong-kuo, Peng, Min-jun, Ayodeji, Abiodun, Chen, Zhi-tao, Long, Ze-yu
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.01.2022
Elsevier
한국원자력학회
Subjects
Air modeling
Eddy-diffusion model
Exposure assessment
Nuclear decommissioning
Radioactive gas
원자력공학
Radioactive gas
Eddy-diffusion model
Air modeling
Nuclear decommissioning
Exposure assessment
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Summary:During the decommissioning of the nuclear facilities, the radioactive gases in pressure vessels may leak due to the demolition operations. The decommissioning site has large space, slow air circulation, and many large nuclear facilities, which increase the difficulty of workers' inhalation exposure assessment. In order to dynamically evaluate the activity distribution of radionuclides and the committed effective dose from inhalation in nuclear decommissioning environment, an inhalation exposure assessment method based on the modified eddy-diffusion model and the inhaled dose conversion factor is proposed in this paper. The method takes into account the influence of building, facilities, exhaust ducts, etc. on the distribution of radioactive gases, and can evaluate the influence of radioactive gases diffusion on workers during the decommissioning of nuclear facilities.
ISSN:1738-5733
2234-358X
DOI:10.1016/j.net.2021.07.017