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NTIS 바로가기Journal of nuclear fuel cycle and waste technology = 방사성폐기물학회지, v.14 no.4, 2016년, pp.367 - 384
백민훈 (한국원자력연구원) , 고낙열 (한국원자력연구원) , 정종태 (한국원자력연구원) , 김경수 (한국원자력연구원)
Many countries have developed a safety case suitable to their own countries in order to improve the confidence of disposal safety in deep geological disposal of high-level radioactive waste as well as to develop a disposal program and obtain its license. This study introduces and summarizes the mean...
핵심어 | 질문 | 논문에서 추출한 답변 |
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방사성폐기물의 지층처분은 어떻게 인식되는가? | 방사성폐기물의 지층처분은 많은 전문가들에 의해 가장 안전한 장기 관리전략으로 인식되어 왔으며[1-4], 이 기술은 기본적으로 피동적(passive) 안전성에 기초하여 정의되고 방어된다. 최근에 방사성폐기물의 지층처분에서 안전성의 개념이 정량적인 안전성평가 결과의 신뢰도를 향상하고 보완하기 위하여 다양한 범위의 증거와 논거들을 포함하는 것으로 확장되었으며, 이러한 확장된 작업들을 지칭하기 위해 보다 광의의 개념인“safety case”라는 용어를 사용하고 있다. | |
고준위방사성폐기물 심층처분시설에 관한 일반기준에 나와있는 safety case에 관한 기준은 무엇인가? | 최근에 원자력안전위원회(NSSC: Nuclear Safety and Security Commission)에서 ‘고준위방사성폐기물 심층처분시설에 관한 일반기준’을 고시하였다[8]. 해당 고시의‘제2장 고준위방사성폐기물의 처분에 따른 방사선위해 방지기준’의 ‘제7조 (신뢰성 구축)’에 따르면 “안전성평가 결과가 안전목표치에 부합함의 판단은 선량 및 위험도의 확률론적 분포특성에 관한 분석, 평가 불확실성의 분석, 자연유사물 및 보조안전지표를 이용한 비교평가, 심층방어 증거의 확보 등 다중의 논거에 의해 뒷받침되어야 한다”고 명시함으로써 safety case에 의해 처분안전성이 확보되어야 함을 요구하고 있다. 따라서 KAERI에서는 KAERI 연구부지 내에 위치하는 지하처분연구시설인 KURT (KAERI Underground Research Tunnel)에서 획득한 다양한 지질 자료와 KURT 환경을 근거로 획득한 핵종거동 자료들을 바탕으로 파이로공정폐기물의 심층처분에 관한 safety case를 개발하고 있다. | |
safety case란 무엇인가? | 최근에 방사성폐기물의 지층처분에서 안전성의 개념이 정량적인 안전성평가 결과의 신뢰도를 향상하고 보완하기 위하여 다양한 범위의 증거와 논거들을 포함하는 것으로 확장되었으며, 이러한 확장된 작업들을 지칭하기 위해 보다 광의의 개념인“safety case”라는 용어를 사용하고 있다. 일반적으로 safety case는 처분시설의 폐쇄 후뿐만 아니라 시설의 신뢰할 수 있는 관리기간 이후에도 처분시설이 안전할 것이라는 주장을 정량화하고 입증할 수 있는 증거, 해석 및 논거들의 총합으로 정의된다[5]. |
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