External dose assessment for workers dismantling the bio-shield of a commercial power nuclear reactor: Case study of Kori-1, Korea

Lee, ChoongWie; Lee, Dong-Hyun; Kim, Hee Reyoung; Lee, Seung Jun

doi:10.1016/j.net.2020.02.010

Cited by 3 publications

(2 citation statements)

References 7 publications

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“…The start year of radiation-related work was set based on the survey responses obtained for nuclear power plants in 1977, industrial radiography in 1968, and others in 1961. Considering that Korea's first commercial nuclear power plant began operating in 1978 [16], radioactive iodine (I-131) was first used for medical purposes in 1959 [17], and industrial radiography began in the early 1960s [18], the starting year we set is reasonable. The detailed reconstruction model equations for each subgroup are provided in supplementary table 1.…”

Section: Discussionmentioning

confidence: 99%

Estimation of the historical radiation dose of Korean radiation workers, 1961–1983

Lee

Jin

et al. 2021

J. Radiol. Prot.

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Accurate dosimetry plays a key role in evaluating the radiation-induced health risks of radiation workers. The National Dose Registry in Korea contains the dose records of radiation workers in nuclear-related occupations since 1984. Thus, radiation doses for workers before 1984 are often sparse or missing. This study aimed to estimate the historical radiation dose before 1984 for radiation workers in Korea based on dose reconstruction models. The dose reconstruction models were derived from the nationwide self-administered questionnaire survey and the personal badge doses for workers in the cohort of the Korean Radiation Worker Study. The mean estimated annual doses between 1984 and 2016 from the dose reconstruction model were 4.67–0.6 mSv, which closely matched the reported doses of 4.51–0.43 mSv. The mean estimated annual doses between 1961 and 1983 based on the exposure scenarios developed by factors associated with radiation doses ranged from 11.08 to 4.82 mSv. The mean estimated annual doses of individuals in the cohort from 1961 to 1983 ranged from 11.15 to 4.88 mSv. Although caution needs to be exercised in the interpretation of these estimations due to uncertainty owed to the nature of extrapolation beyond the range of observed data, this study offers a sense of the radiation doses for workers during Korea’s early period of radiation-related activities, which can be a useful piece of information for radiation-induced health risk assessments.

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Section: Discussionmentioning

confidence: 99%

Estimation of the historical radiation dose of Korean radiation workers, 1961–1983

Lee

Jin

et al. 2021

J. Radiol. Prot.

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“…Decommissioning scenarios and dose assessments were based on scenarios used in previous studies and the results of the dose assessment analysis [23,24]. This scenario considers cutting an activated bio-shield using a diamond wire saw (DWS), wet cutting, and dry cutting.…”

Section: Scenario Assumptionsmentioning

confidence: 99%

Analysis of the Work Time and the Collective Dose by Correcting the Learning-Forgetting Curve Model in Decommissioning of a Nuclear Facility

Lee¹,

Kim²,

Lee³

2023

J Radiat Prot Res

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Background: As the number of nuclear facilities nearing their pre-determined design life increases, demand is increasing for technology and infrastructure related to the decommissioning and decontamination (D&D) process. It is necessary to consider the nature of the dismantling environment constantly changing and the worker doing new tasks. A method was studied that can calculate the effect of learning and the change in work time on the work process, according to the learning-forgetting curve model (LFCM).Materials and Methods: The LFCM was analyzed, and input values and scenarios were analyzed for substitution into the D&D process of a nuclear facility.Results and Discussion: The effectiveness and efficiency of the training were analyzed. It was calculated that skilled workers can receive a 16.9% less collective radiation dose than workers with only basic training.Conclusion: Using these research methods and models, it was possible to calculate the change in the efficiency of workers performing new tasks in the D&D process and the corresponding reduction in the work time and collective dose.

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Framework for the development of guidelines for nuclear power plant decommissioning workers based on risk information

Heo

Lee

Kim

et al. 2022

Nuclear Engineering and Design

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External dose assessment for workers dismantling the bio-shield of a commercial power nuclear reactor: Case study of Kori-1, Korea

Cited by 3 publications

References 7 publications

Estimation of the historical radiation dose of Korean radiation workers, 1961–1983

Estimation of the historical radiation dose of Korean radiation workers, 1961–1983

Analysis of the Work Time and the Collective Dose by Correcting the Learning-Forgetting Curve Model in Decommissioning of a Nuclear Facility

Framework for the development of guidelines for nuclear power plant decommissioning workers based on risk information

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