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http://dx.doi.org/10.1016/j.net.2021.01.035

Region-wise evaluation of gamma-ray exposure dose in decontamination operation after a nuclear accident  

Jeong, Hae Sun (Korea Atomic Energy Research Institute)
Hwang, Won Tae (Korea Atomic Energy Research Institute)
Han, Moon Hee (Korea Atomic Energy Research Institute)
Kim, Eun Han (Korea Atomic Energy Research Institute)
Lee, Jo Eun (Korea Atomic Energy Research Institute)
Lee, Cheol Woo (Korea Atomic Energy Research Institute)
Publication Information
Nuclear Engineering and Technology / v.53, no.8, 2021 , pp. 2652-2660 More about this Journal
Abstract
The gamma-ray exposure doses in decontamination operation after a nuclear accident were evaluated with a consideration of various geometrical conditions and specific gamma-ray energies. The calculation domain is organized with three residence types and each form is divided into two kinds of geometrical arrangements. The position-wise air KERMA values were calculated with an assumption of evenly distributed gamma-ray source based on Monte Carlo radiation transport analysis using the MCNP code. The radioactivity is initially set to be unity to be multiplied by the deposition value measured in the actual accident condition. The workforce data set depending on the target object was determined by modifying the Fukushima report. The external exposure doses for decontamination workers were derived from the calculated KERMA values and the workforce analysis. These results can be used to efficiently determine the workforce required by the characteristics of the area and the structure to be decontaminated within the dose limits.
Keywords
Decontamination worker; Gamma-ray exposure; Monte Carlo method; KERMA; Externel dose;
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