[논문]미국의 건식저장 캐니스터에서의 CISCC 연구에 대한 검토

박형규; 박광헌

doi:10.7733/jnfcwt.2018.16.4.455

미국의 건식저장 캐니스터에서의 CISCC 연구에 대한 검토
Review of Research on Chloride-Induced Stress Corrosion Cracking of Dry Storage Canisters in the United States 원문보기

Journal of nuclear fuel cycle and waste technology = 방사성폐기물학회지, v.16 no.4, 2018년, pp.455 - 472

초록
AI-Helper

국내의 사용후핵연료가 증가함에 따라 사용후핵연료 저장조는 곧 포화가 될 것으로 예상된다. 따라서 사용후핵연료 건식저장 운영 및 관리 방안에 대해 연구하는 것은 매우 중요하다. 미국에서는 오랜 기간 건식저장을 운영해왔으며 이를 바탕으로 사용후핵연료 건식저장 운영 및 관리 방안에 대해 많은 연구가 수행되고 있다. 그러나 우리나라에서는 경수로 사용후핵연료건식저장 경험이 없으며 관련 관리방안 및 구체적인 기준이 매우 부족한 현실이다. 건식저장기간 동안 주요한 이슈중의 하나는 건식저장용기 열화현상이며 대표적으로 응력부식균열에 의한 부식현상이 있다. 미국에서는 U.S. DOE, U.S. NRC, 그리고 EPRI 주관 아래 건식저장 캐니스터에서의 염화물 응력부식균열에 관한 많은 연구들을 수행하고 있다. 또한 건식저장 캐니스터의 염화물 응력부식균열 현상을 설명하기 위해 SNL에서는 확률론적 응력부식균열 모델을 제시하였다. 본 논문에서는 SNL에서 제시한 확률론적 응력부식균열 모델을 검토하였으며 모델에 제시된 주요인자들을 세세하게 분석하였다. 본 논문은 우리나라에서 스테인리스 스틸로 제작된 캐니스터를 경수로 사용후핵연료 건식저장으로 이용할 경우, 건식저장 운영 및 관리 방안을 구축하는 대에 좋은 참고문헌이 될 것이라 사료된다.

Abstract ▼ AI-Helper

It is important to study how to manage dry storage casks of spent nuclear fuels (SNF), because wet storage spaces for SNF will shortly be at full capacity in the Republic of Korea. The US has operated a dry storage cask system for several decades, and has carried out significant studies into how to successfully manage dry storage cask for SNF. This type of expertise and experience is currently lacking in the Republic of Korea. The degradation of dry casks is an important issue that must be considered. In particular, chloride-induced stress corrosion cracking (CISCC) is known to lead to the release of radioisotopes from canisters. The U.S. Department of Energy, U.S. Nuclear Regulatory Commission, and the Electric Power Research Institute have undertaken research into the CISCC mechanism. In addition, Sandia National Laboratories (SNL) has extensively researched CISCC and how to manage it in dry storage canisters. In this review paper, the probabilistic model proposed by the SNL is analyzed and, based on this model, US-based CISCC research is reviewed in detail. This paper will inform the management of dry cask storage of SNF from light water reactors in austenite stainless steel canisters in the Republic of Korea.

주제어

질의응답

핵심어	질문	논문에서 추출한 답변
	건식저장 운영 및 관리를 해온 해외사례를 검토 및 분석하는 것이 중요한 이유는 무엇인가?	이에 따라 경수로의 경우 2024년 이전에 소내 또는 소외 저장시설을 만들어 경수로 사용후 핵연료를 저장해야 한다. 우리나라의 경우 월성에서 중수로 사용후핵연료 건식저장 운영 및 관리 경험이 있으나 경수로 사용후핵연료 건식저장 운영 및 관리 경험은 없다. 따라서 오랜 기간 경수로 사용후핵연료 건식저장 운영 및 관리를 해온 해외사례를 검토 및 분석하는 것은 앞으로 국내에서의 올바른 건식저장 운영 및 관리를 위해 매우 중요하다.
	건식저장방식이란 무엇인가?	미국은 오랜 기간 건식저장을 운영해왔으며 건식저장용기 관리 방안에 대해 구체적인 기준을 가지고 있다[3-15]. 건식저장방식은 저장기간 동안 사용후핵연료의 대규모 파단 사고를 예방하고, 사용후핵연료를 영구처분하기 전의 임시적으로 저장을 하는 방법이기 때문에 처분을 위한 수송 시점까지의 회수 가능성(Retrievability)을 유지하고 있어야 한다. 또한 최근에는 건식저장조건에서 사용후핵연료 또는 건식저장용기의 열화현상에 대한 연구의 중요성들이 언급되고 있다[16-22].
	건식저장기간 동안 주요한 이슈로는 무엇이 있는가?	그러나 우리나라에서는 경수로 사용후핵연료건식저장 경험이 없으며 관련 관리방안 및 구체적인 기준이 매우 부족한 현실이다. 건식저장기간 동안 주요한 이슈중의 하나는 건식저장용기 열화현상이며 대표적으로 응력부식균열에 의한 부식현상이 있다. 미국에서는 U.

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저자의 다른 논문 :

표제어: PCR

동의어: Packet Collision Rate

용어 설명 출처 목록 (6)

용어 설명: PCR은 세균 특이성이 있는 primer를 이용하여 적은 수의 세균이 있을지라도 쉽게 검출할 수 있는 유용한 방법이며, 이를 이용하여 구강 내 치면세균막이나 타액에서 직접 세균을 검출할 수 있게 되었다[8].

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