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학술저널
저자정보
전성훈 (경희대학교 원자력공학과) 이성연 (경희대학교 원자력공학과) 김혁재 (경희대학교 원자력공학과) 김민성 (경희대학교 원자력공학과) 김민성 (경희대학교 원자력공학과) 김광표 (경희대학교)
저널정보
한국방사선산업학회 방사선산업학회지 방사선산업학회지 제17권 제2호
발행연도
2023.6
수록면
151 - 160 (10page)
DOI
10.23042/radin.2023.17.2.151

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The International Atomic Energy Agency (IAEA) proposes 11 industries that handle NaturallyOccurring Radioactive Material (NORM) that are considered to need management. A water treatmentfacility is one of the above industries that takes in groundwater and produces drinking water througha water treatment process. Groundwater can accumulate natural radionuclides such as uranium andthorium in raw water by contacting rocks or soil containing natural radionuclides. Therefore, there is apossibility that workers in water treatment facilities will be exposed due to the accumulation of naturalradionuclides in the water treatment process. The goal of this study is to evaluate the external radiationdose according to the working type of workers in water treatment facilities. In order to achieve the abovegoal, the study was conducted by dividing it into 1) analysis of the exposure environment, 2) measurementof the external radiation dose rate 3) evaluation of the external radiation dose. In the stage of analyzingthe exposure environment, major processes that are expected to occur significantly were derived. Inthe measurement stage of the external radiation dose rate, a map of the external radiation dose ratewas prepared by measuring the spatial radiation dose rate in major processes. Through this, detailedmeasurement points were selected considering the movement of workers. In the external radiation doseevaluation stage, the external radiation dose was evaluated based on the previously derived externalradiation dose rate and working time. As a result of measuring the external radiation dose rate at thedetailed points of water treatment facilities A to C, it was 1.90×10-1 to 3.75×100 μSv h-1, and the externalradiation dose was analyzed as 3.27×10-3 to 9.85×10-2 mSv y-1. The maximum external radiation doseappeared during the disinfection and cleaning of activated carbon at facility B, and it is judged that naturalradionuclides were concentrated in activated carbon. It was found that the external radiation dose ofworkers in the water treatment facility was less than 1 mSv y-1, which is about 10% of the dose limit forthe public. As a result of this study, it was found that the radiological effect of external radiation dose ofdomestic water treatment facility workers was insignificant. The results are expected to contribute asbackground data to present optimized safety management measures for domestic NORM industries inthe future.

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