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

Korean Radioactive Waste Society (한국방사성폐기물학회)
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Review of Aging Management for Concrete Silo Dry Storage Systems

  • Donghee Lee (Central Research Institute, Korea Hydro & Nuclear Power Co., Ltd.) ;
  • Sunghwan Chung (Central Research Institute, Korea Hydro & Nuclear Power Co., Ltd.) ;
  • Yongdeog Kim (Central Research Institute, Korea Hydro & Nuclear Power Co., Ltd.) ;
  • Taehyung Na (Central Research Institute, Korea Hydro & Nuclear Power Co., Ltd.)
  • Received : 2023.08.29
  • Accepted : 2023.09.21
  • Published : 2023.12.30
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Abstract

The Wolsong Nuclear Power Plant (NPP) operates an on-site spent fuel dry storage facility using concrete silo and vertical module systems. This facility must be safely maintained until the spent nuclear fuel (SNF) is transferred to an external interim or final disposal facility, aligning with national policies on spent nuclear fuel management. The concrete silo system, operational since 1992, requires an aging management review for its long-term operation and potential license renewal. This involves comparing aging management programs of different dry storage systems against the U.S. NRC's guidelines for license renewal of spent nuclear fuel dry storage facilities and the U.S. DOE's program for long-term storage. Based on this comparison, a specific aging management program for the silo system was developed. Furthermore, the facility's current practices-periodic checks of surface dose rate, contamination, weld integrity, leakage, surface and groundwater, cumulative dose, and concrete structure-were evaluated for their suitability in managing the silo system's aging. Based on this review, several improvements were proposed.

Keywords

Acknowledgement

This work was supported by the Institute of Korea Spent Nuclear Fuel grant funded by the Korea government the Ministry of Trade, Industry and Energy (No.2021040101002C).

References

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