Nuclear Engineering and Technology

Korean Nuclear Society (한국원자력학회)
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Method for clearance of contaminated buildings in Korea research reactor 1 and 2

  • Geun-Ho Kim (KRR Decommissioning Team, Korea Atomic Energy Research Institute) ;
  • Dooseong Hwang (KRR Decommissioning Team, Korea Atomic Energy Research Institute) ;
  • Jung Ho Song (Department of Nuclear Engineering, BRnC) ;
  • Junhyuck Im (KRR Decommissioning Team, Korea Atomic Energy Research Institute) ;
  • Junhee Lee (KRR Decommissioning Team, Korea Atomic Energy Research Institute) ;
  • Minyoung Kang (KRR Decommissioning Team, Korea Atomic Energy Research Institute) ;
  • Kwang Pyo Kim (Department of Nuclear Engineering, Kyung Hee University)
  • Received : 2023.02.27
  • Accepted : 2023.03.13
  • Published : 2023.06.25
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Abstract

The objective of this study was the establishment of clearance method that can ensure radiological safety and reasonably minimize radioactive waste when demolishing contaminated buildings at KRR-1&2. By reviewing Korean and international laws related to decommissioning, the method for clearance of contaminated buildings presented in this study is to first decontaminate the building and then conduct a radiological safety assessment, such as measuring residual radioactivity, to determine whether the radiation dose criteria for clearance are satisfied. The measurement results meet the radiation dose criteria, the contaminated buildings are regarded as clearance and can be converted into the general buildings. The demolition of the cleared buildings is carried out using conventional demolition methods. The waste generated during the demolition is classified as general construction waste and is disposed of according to relevant laws. The proposed method significantly optimized the number of samples analyzed and reduced the time and cost associated with the decommissioning. The established method will be applied to the ongoing decommissioning of contaminated buildings at KRR-1&2, and its application will be verified by regulatory bodies. The study suggests that this method could be used for the decommissioning of contaminated buildings at other Korean nuclear facilities in the future.

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Acknowledgement

This study was supported by a research grant from the Korea Atomic Energy Research Institute (KAERI) [Grant No. 521240-23, South Korea]. This study was presented at the International Conference on Nuclear Analytical Techniques in 2022 (NAT2022), which was held in Daejeon, Korea, from Dec. 7 to 9, 2022.

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