방사선산업학회지 (Journal of Radiation Industry)

한국방사선산업학회 (Korean Society of Radiation Industry)
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사용후핵연료 습식저장시설 사고 안전성 평가 연구 현황 및 사고 사례 분석

Analysis on Study Cases of Safety Assessment and Cases for Spent Nuclear Fuel Pool Accident

  • 이신동 (경희대학교 원자력공학과) ;
  • 김혁재 (경희대학교 원자력공학과) ;
  • 손건우 (경희대학교 원자력공학과) ;
  • 김광표 (경희대학교 원자력공학과)
  • Shin Dong Lee (Department of Nuclear Engineering, Kyung Hee University) ;
  • Hyeok Jae Kim (Department of Nuclear Engineering, Kyung Hee University) ;
  • Geon Woo Son (Department of Nuclear Engineering, Kyung Hee University) ;
  • Kwang Pyo Kim (Department of Nuclear Engineering, Kyung Hee University)
  • 투고 : 2023.09.07
  • 심사 : 2023.09.20
  • 발행 : 2023.09.30
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초록

Spent nuclear fuel corresponds to high-level radioactive waste that has high decay heat and radioactivity. Accordingly, Spent nuclear fuel withdrawn from the reactor core is primarily stored and managed in a spent nuclear fuel pool in the nuclear power plant to reduce decay heat and radioactivity. In Korea, most nuclear power plant store all spent nuclear fuel in a spent nuclear fuel pool. For wet storage, there are no defense in depth different with reactor core. The study related to spent nuclear fuel pool accident should be carried out to ensure safety. Therefore, it is necessary to analyze previous study cases related to safety of spent nuclear fuel pool and accident cases to build foundational knowledge. The Objective of this study is to analyze study cases of safety assessment and cases for spent nuclear fuel pool accident. For analyzing study cases of safety assessment, possible phenomena when spent nuclear fuel pool accident occurring identified, Subsequently, study cases for safety assessment about each phenomena were investigated, and materials & methods and results for each study are analyzed. For analyzing cases for spent nuclear fuel pool accident, we analyzed accident cases caused by loss of cooling and loss of coolant in spent nuclear fuel pool. Subsequently, causes and change of water level and temperature by each accident case are analyzed. As a result of the analysis on study cases of spent nuclear fuel pool accident, the results of the study conducted by each research institute were vary depending on the computer code, materials & methods of experiment and major assumptions used in the study. As a result of analyzing cases for spent nuclear fuel pool accident, it was found that accident cases for loss of cooling is more than cases for loss of coolant accident. Even though the types of accident in spent nuclear fuel pool were similar, the specific causes were different by each accident case. All the accident cases analyzed did not lead to severe accidents, such as nuclear fuel being exposed to the air. The result of this study will be used as fundamental data for study on spent nuclear fuel pool accident that will be conducted in the future.

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과제정보

본 연구는 한국에너지기술평가원에서 주관하는 에너지기술 개발사업의 일환으로 수행된 연구입니다(No. 2021171020001B).

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