Journal of Radiation Industry (방사선산업학회지)

Korean Society of Radiation Industry (한국방사선산업학회)
권호 표지
DOI QR코드

DOI QR Code

Dose Reduction Factors for High-Exposure Tasks at Korean Pressurized Water Reactors

  • Changju Song (Department of Nuclear Engineering, Chosun University) ;
  • Tae Young Kong (Department of Nuclear Engineering, Chosun University) ;
  • Seongjun Kim (Department of Nuclear Engineering, Chosun University) ;
  • Jinho Son (Department of Nuclear Engineering, Chosun University) ;
  • Jiung Kim (Department of Nuclear Engineering, Chosun University) ;
  • Jaeok Park (Department of Nuclear Engineering, Chosun University) ;
  • Hee Geun Kim (Division of Energy & Electrical Engineering, Uiduk University) ;
  • Yongkwon Kim (Nucare Inc.) ;
  • Hyungkwon Jung (Saebit E&E Co., Ltd.)
  • Received : 2024.03.04
  • Accepted : 2024.03.15
  • Published : 2024.03.31
Download PDF
⟨ Previous Next ⟩

Abstract

This study was conducted to analyze the characteristics of three high-exposure tasks performed by radiation workers in Korean pressurized water reactors (PWRs) and to identify factors that reduce their exposure during work. Three high-exposure tasks were selected based on a previous study. In this previous study, nozzle dam installation and removal, eddy current testing, and manway opening and closing were determined as high-exposure tasks through normalization (radiation dose per unit time). Based on the analysis of the characteristics of the high-exposure tasks in this study, the high-exposure tasks were steam generator-related tasks performed inside and outside the water chamber. This study analyzed the reduction factors for high-exposure tasks and suggested improvements in terms of time, distance, and shielding. The use of the characteristics of high-exposure tasks and their dose reduction factors enables Korean PWRs to optimize radiation protection for workers who receive relatively high doses.

Keywords

Acknowledgement

This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korean Government (MSIT) (No. RS-2022-00144506)

References

  1. Korea Hydro & Nuclear Power. Nuclear Power Plant Status. KHNP; Gyeongju, Korea: updated Dec 2023; [cited Dec 2022], Available from: https://npp.khnp.co.kr/index.khnp?menuCd=DOM_000000102002001001.
  2. Korea Hydro and Nuclear Power. Annual Report of Occupational Exposure in Nuclear Power Plants, KHNP, Gyeongju, Korea, 2013 ([in Korean]).
  3. Korea Hydro and Nuclear Power. Annual Report of Occupational Exposure in Nuclear Power Plants, KHNP, Gyeongju, Korea, 2014 ([in Korean]).
  4. Korea Hydro and Nuclear Power. Annual Report of Occupational Exposure in Nuclear Power Plants, KHNP, Gyeongju, Korea, 2015 ([in Korean]).
  5. Korea Hydro and Nuclear Power. Annual Report of Occupational Exposure in Nuclear Power Plants, KHNP, Gyeongju, Korea, 2016 ([in Korean]).
  6. Korea Hydro and Nuclear Power. Annual Report of Occupational Exposure in Nuclear Power Plants, KHNP, Gyeongju, Korea, 2017 ([in Korean]).
  7. Korea Hydro and Nuclear Power. Annual Report of Occupational Exposure in Nuclear Power Plants, KHNP, Gyeongju, Korea, 2018 ([in Korean]).
  8. Korea Hydro and Nuclear Power. Annual Report of Occupational Exposure in Nuclear Power Plants, KHNP, Gyeongju, Korea, 2019 ([in Korean]).
  9. Korea Hydro and Nuclear Power. Annual Report of Occupational Exposure in Nuclear Power Plants, KHNP, Gyeongju, Korea, 2020 ([in Korean]).
  10. Korea Hydro and Nuclear Power. Annual Report of Occupational Exposure in Nuclear Power Plants, KHNP, Gyeongju, Korea, 2021 ([in Korean]).
  11. Korea Hydro and Nuclear Power. Annual Report of Occupational Exposure in Nuclear Power Plants, KHNP, Gyeongju, Korea, 2022 ([in Korean]).
  12. Song C, Kong TY, Kim S, Son J, Kim H, Kim J, Park J, Kim HG, Kim Y. 2024. High-radiation-exposure work in Korean pressurized water reactors. Nuclear Engineering and Technology, under publication, https://doi.org/10.1016/j.net.2023.12.048.
  13. Korea Hydro and Nuclear Power. Development of Occupational Radiation Exposure Reduction Technology at Nuclear Power Plant, KHNP, Gyeongju, Korea, 2005.
  14. Korea Electric Power Corporation. Radiation Exposure Analysis Report, KEPCO KPS, Naju, Korea, 2022.
  15. Lee DH. 2017. Managerial Factors Influencing Dose Reduction of the Nozzle Dam Installation and Removal Tasks Inside a Steam Generator Water Chamber. J Ergon Soc Korea. 36(5):559-568. https://doi.org/10.5143/JESK.2017.36.5.559.
  16. Kim HG, Kong TY, Jeong WT, Kim ST. 2010. An Effects of Radiation Dose Assessment for Radiation Workers and the Member of Public from Main Radionuclides at Nuclear Power Plants. Journal of Radiation Protection. 35(1):12-20.
  17. Kim GH and Kong TY. 2010. Selection of the Most Appropriate Two-Dosemeter Algorithm for Estimating Effective Dose Equivalent during Maintenance Periods in Korean Nuclear Power Plants. Radiation Protection Dosimetry. 140(2):171-181. https://doi.org/10.1093/rpd/ncq073.
  18. Lee DH. 2018. Performance Evaluation of Experts Predicting the Delay Factors and the Delay Time of the Nozzle Dam Installation and Removal Tasks. J Ergon Soc Korea. 37(2):155-168. https://doi.org/10.5143/JESK.2018.37.2.155.
  19. Chae GS. 2004. Review on the Working Hours of the Radiation Work Plan for ECT through In-service Inspection. J Korea Asso Radiat Prot. 29(1):57-63.
  20. Oh HC, Na JH, Lee JS, Moon JH. 1999. Methodology to Reduce Occupational Dose in NPP Design. K. Korean Nuclear Society Conference.