Nuclear Engineering and Technology

Korean Nuclear Society (한국원자력학회)
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Classification and consideration for the risk management in the planning phase of NPP decommissioning project

  • Gi-Lim Kim (Korea Hydro & Nuclear Power (KHNP) Central Research Institute) ;
  • Hyein Kim (Korea Hydro & Nuclear Power (KHNP) Central Research Institute) ;
  • Hyung-Woo Seo (Korea Hydro & Nuclear Power (KHNP) Central Research Institute) ;
  • Ji-Hwan Yu (Korea Hydro & Nuclear Power (KHNP) Central Research Institute) ;
  • Jin-Won Son (Korea Hydro & Nuclear Power (KHNP) Central Research Institute)
  • Received : 2022.03.29
  • Accepted : 2022.07.30
  • Published : 2022.12.25
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Abstract

The decommissioning project of a nuclear facility is a large-scale process that is expected to take about 15 years or longer. The range of risks to be considered is large and complex, then, it is expected that various risks will arise in decision-making by area during the project. Therefore, in this study, the risk family derived from the Decommissioning Risk Management (DRiMa) project was reconstructed into a decommissioning project risk profile suitable for the Kori Unit 1. Two criteria of uncertainty and importance are considered in order to prioritize the selected 26 risks of decommissioning project. The uncertainty is scored according to the relevant laws and decommissioning plan preparation guidelines, and the project importance is scored according to the degree to which it primarily affects the triple constraints of the project. The results of risks are divided into high, medium, and low. Among them, 10 risks are identified as medium level and 16 risks are identified as low level. 10 risks, which are medium levels, are classified in five categories: End state of decommissioning project, Management of waste and materials, Decommissioning strategy and technology, Legal and regulatory framework, and Safety. This study is a preliminary assessment of the risk of the decommissioning project that could be considered in the preparation stage. Therefore, we expect that the project risks considered in this study can be used as an initial data for reevaluation by reflecting the detail project progress in future studies.

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References

  1. Nuclear Safety Act, June 2021 (In Korean).
  2. KHNP, Open nuclear power plant operation information, Korea Hydro & Nuclear Power Co., [Online]. Available: http://npp.khnp.co.kr/.
  3. KISTEP, 2020 Initial Feasibility Study Report: Nuclear Power Plant Decommissioning Core Technology Development Project, Korea Institute of S&T Evaluation and Planning, March 2021, 11-1721000-000520-01.
  4. H. Yoon, A Search for a Legal Regime for Nuclear Decommissioning in Korea - in Consideration of Fostering a Nuclear Decommissioning Industry, 2020.
  5. IAEA, Management of Project Risks in Decommissioning, International Atomic Energy Agency, 2019. SRS No.97.
  6. PMI, PMBOK Guide, Project Management Institute, 2017. Rev.6.
  7. IAEA, Decommissioning of Facilities, International Atomic Energy Agency, 2014.
  8. T. Raz, et al., Risk Management, Project Success, and Technological Uncertainty, November 2002.
  9. Enforcement Rule of the Nuclear Safety Act, June 2021 (In Korean).
  10. NSSC, Standard Format and Content of the Decommissioning Plan for Nuclear Facilities, Notices of the Nuclear Safety and Security Commission, June 2021. No. 2021-10.
  11. NSSC, Regulation on the Methods of Verifying and Inspecting the Decommissioning Status of Nuclear Facilities, Nuclear Safety and Security Commission, June 2021. Notice of NSSC No. 2021-12.
  12. NSSC, Standards for the Re-use of Site and Remaining Buildings after the Decommissioning of Nuclear Facilities, Notices of the Nuclear Safety and Security Commission, June 2021. No. 2021-11.
  13. KINS, Safety Review Guideline on Final Decommissioning Plan for Decommissioning Approval, Korea Institute of Nuclear Safety, June 2020. KINS/GEG002.
  14. KEI, Environmental Strategies for Site Reuse of Decommissioned Nuclear Power Plants, Korea Environment Institute, 2019. ISSN 2288-9043.
  15. KORAD, 2021 Implementation Plan for Low and Intermediate Level Radioactive Waste, Korea Radioactive Waste Agency, 2021.
  16. T. Oritz, et al., Radiological protection during the dismantling of nuclear facilities, in: 13th International Congress of the International Radiation Protection Association, May 2012.
  17. IAEA, Decommissioning of Facilities, International Atomic Energy Agency, 2014. GSR Part.6.
  18. G. Jeong, Quantitative assessment model of nuclear facility decommissioning process risks, in: Korean Radioactive Waste Society Conference, 2011.
  19. IAEA, Management of Nuclear Power Plant Projects, International Atomic Energy Agency, 2020. NG-T-1.6.