방사성폐기물학회지 (Journal of Nuclear Fuel Cycle and Waste Technology(JNFCWT))

  • 제22권2호
  • /
  • Pages.117-128
  • /
  • 2024
  • /
  • 1738-1894(pISSN)
  • /
  • 2288-5471(eISSN)
한국방사성폐기물학회 (Korean Radioactive Waste Society)
권호 표지
DOI QR코드

DOI QR Code

Irradiation Effect on Silo Dry Storage Systems for CANDU Spent Nuclear Fuel

  • Taehyung Na (Central Research Institute, Korea Hydro & Nuclear Power Co., Ltd.) ;
  • Yeji Kim (Central Research Institute, Korea Hydro & Nuclear Power Co., Ltd.) ;
  • Donghee Lee (Central Research Institute, Korea Hydro & Nuclear Power Co., Ltd.) ;
  • Taehyeon Kim (Central Research Institute, Korea Hydro & Nuclear Power Co., Ltd.) ;
  • Sunghwan Chung (Central Research Institute, Korea Hydro & Nuclear Power Co., Ltd.)
  • 투고 : 2024.02.27
  • 심사 : 2024.04.01
  • 발행 : 2024.06.30
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

The 300 concrete silo systems installed and operated at the site of Wolsong nuclear power plant (NPP) have been storing CANDU spent nuclear fuel (SNF) under dry conditions since 1992. The dry storage system must be operated safely until SNF is delivered to an interim storage facility or final repository located outside the NPP in accordance with the SNF management policy of the country. The silo dry storage system consists of a concrete structure, liner steel plate in the inner cavity, and fuel basket. Because the components of the silo system are exposed to high energy radiation owing to the high radioactivity of SNF inside, the effects of irradiation during long-term storage must be analyzed. To this end, material specimens of each component were manufactured and subjected to irradiation and strength tests, and mechanical characteristics before and after irradiation were examined. Notably, the mechanical characteristics of the main components of the silo system were affected by irradiation during the storage of spent fuel. The test results will be used to evaluate the long-term behavior of silo systems in the future.

키워드

과제정보

This work was supported by the Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant funded by the Korea government (MOTIE) (2021171020001B).

참고문헌

  1. Korea Hydro and Nuclear Power Co. Ltd. Safety Analysis Report for the 4th Extension of Spent Nuclear Fuel Dry Storage Facility of Wolsong Nuclear Power Plant Unit, KHNP Report (2004). 
  2. Korea Nuclear Safety Commission, Detailed Technical Standards for the Structure and Equipment of Intermediate Storage Facilities of Spent Fuel, Notice No. 2021-20, Article 15 (2021). 
  3. U.S. Nuclear Regulatory Commission. February 26 2001. "10 Code of Federal Regulations Part 72, Subpart C-Issuance and Conditions of License, Section 72.48 Changes, Tests, and Experiments." U.S. NRC Library. Accessed Feb. 15 2024. Available from: https://www.nrc.gov/reading-rm/doc-collections/cfr/part072/full-text.html#part072-0048. 
  4. International Atomic Energy Agency, Storage of Spent nuclear Fuel, IAEA Safety Standards Series, No. SSG-15 Rev.1 (2020). 
  5. International Atomic Energy Agency. Understanding and Managing Ageing of Material in Spent Fuel Storage Facilities, IAEA Technical Report Series, No. 443 (2006). 
  6. K.S. Lee, Reactor Fuels and Materials, 1st ed., Hyoilbooks, Seoul (in Korean) (2012). 
  7. Korea Nuclear Safety and Security Commission, Guidance on Technical Application Standards for Evaluating the Continued Operation of Nuclear Reactor Facilities, Notice No. 2017-29 (2017). 
  8. U.S. Electric Power Research Institute. Irradiation Damage of the Concrete Biological Shield: Basis for Evaluation of Concrete Biological Shield Wall for Aging Management, EPRI Technical Report, 3002011710 (2018). 
  9. U.S. Electric Power Research Institute. 2020 Update to Irradiation of Concrete Guidance: Basis for Evaluation of Concrete Biological Shield Wall for Aging Management, Revision 1, EPRI Technical Report, 3002018400 (2020). 
  10. Physics Forums. August 6 2015. "Radiation Damage In Metal From Gamma Rays." Physics Forums homepage. Accessed. Jan. 22 2023. Available from: http://www.physicsforums.com/threads/radiation-damage-in-metals-from-gamma-rays.826449. 
  11. U.S. Nuclear Regulatory Commission, Review of Radiation-Induced Concrete Degradation and Potential Implications for Structures Exposed to High Long-Term Radiation Levels in Nuclear Power Plants, NUREG/CR-7280 (2021). 
  12. O. Kontani, Y. Ichikawa, A. Ishizawa, M. Takizawa, and O. Sato, "Irradiation Effects on Concrete Structures", in: Infrastructure Systems for Nuclear Energy, T.C. Thomas Hsu and C.L. Wu, eds., 459-473, John Wiley & Sons, Ltd., New Jersey (2013). 
  13. Korea Atomic Energy Research Institute. Technical Report on Radioactive Aging of Concrete for Spent Nuclear Fuel Storage, KAERI Technical Report, KAERI/AR-851/2010 (2010). 
  14. U.S. Nuclear Regulatory Commission, Primer on Durability of Nuclear Power Plant Reinforced Concrete Structure-A Review of Pertinent Factors, NUREG/CR-6927 (2007).