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Exposure Analysis and Selection of Representative High Exposure Tasks for Radiation Work in Domestic Nuclear Power Plants

국내 원자력발전소 방사선작업에 대한 피폭 분석 및 대표 고 피폭 작업 선정

  • Chan Yang Lee (The Korean Association for Radiation Protection) ;
  • Young-Khi Lim (The Korean Association for Radiation Protection) ;
  • Kwang Pyo Kim (Department of Nuclear Engineering, Kyung Hee University)
  • Received : 2024.05.14
  • Accepted : 2024.06.12
  • Published : 2024.06.30

Abstract

This study aims to identify high exposure tasks among the tasks performed in domestic nuclear power plants as a basis for developing training programs to improve the efficiency of workers' work. To this end, we first analyzed the exposure status of radiation work in domestic nuclear power plants. Radiation tasks in nuclear power plants were categorized, collective doses were investigated, and the collective doses were calculated based on the collective doses, and representative high exposure tasks were identified. We found that the collective and individual doses in domestic nuclear power plants are continuously decreasing, but there is an imbalance of exposure among workers. In terms of work classification, nuclear power plants are managed in 236 work codes based on light water reactors and 181 work codes based on heavy water reactors, depending on the work equipment and location. Among the total work codes, 23 codes have an annual average dose exceeding 10 μSv, and based on this, 10 representative high exposure tasks were derived. The representative high exposure tasks were selected as S/G nozzle dam work, S/G debris removal work, nuclear instrumentation system, S/G eddy current detection work, and insulation work. The results of this study are expected to serve as an important basis for reducing the exposure of workers in nuclear power plants and improving work efficiency.

Keywords

Acknowledgement

이 논문은 2022년도 정부 (산업통상자원부)의 재원으로 한국에너지기술평가원의 지원을 받아 수행된 연구임(No. 20224B10300090, ALARA 분석평가 프로그램 및 3D-BIM 기반 실감몰입형 피폭선량 예측진단 합시스템 기술개발).

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