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NTIS 바로가기Journal of nuclear fuel cycle and waste technology = 방사성폐기물학회지, v.17 no.1, 2019년, pp.75 - 94
As the present single-layer repository concept requires too large an area for the site of the repository, a multi-layer repository concept has been suggested to improve the disposal density. The effects of the excavation damaged zone around the multi-layer repository constructed in the deep host roc...
핵심어 | 질문 | 논문에서 추출한 답변 |
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단층 심지층처분장 개념 문제점에 대한 방안 개념은 무엇인가? | 현재 고려되고 있는 단층 심지층처분장 개념은 부지 소요면적이 지나치게 크기 때문에, 처분밀도를 향상시키기 위한 다층 심지층처분장 개념이 제안되고 있다. 심부암반에 건설된 다층 심지층처분장 주위에 형성된 암반손상대가 심지층처분장의 온도 분포에 미치는 영향이 분석되었다. | |
사용후핵연료 처분방식의 장점과 단점은 무엇인가? | 현재 우리나라에서 고려되고 있는 심지층처분장 설계계념은 단일 층의 처분터널 바닥에 굴착된 처분공에 처분용기를 정치시키는 “단층 심지층처분장” 개념을 택하고 있다. 이 “단층 심지층처분장” 개념은 안전 여유도가 높다는 장점이 있지만 너무 보수적인 측면이 있어, 심지층처분장을 건설하기 위해 필요한 부지 면적이 지나치게 넓다는 문제점이 있다. 특히 우리나라와 같이 국토가 협소하고, 인구밀도가 높은 국가에서 보수성을 지나치게 강조하면, 심지층처분장에 적합한 부지를 확보하는 것이 불가능할 수도 있다. | |
암반손상대의 존재는 무슨 영향을 끼치는가? | 다층 심지층처분장의 열해석에는 완충재, 뒤채움재 및 암반에서 일어나는 재포화 현상을 고려한 열-수리 모델이 사용되었다. 암반손상대의 존재는 심지층처분장의 온도 분포에 큰 영향을 미치는 것으로 나타났으며, 손상대의 크기와 열전도도 저하 정도에 따라 복층 및 삼층 심지층처분장의 최고첨두온도를 각각 최대 $7^{\circ}C$와 $12^{\circ}C$까지 증가시킬 수 있다. 다층 심지층처분장의 첨두온도에 영향을 크게 미치는 인자는 암반손상대에서의 열전도도 저하이며, 처분공 주위에 형성된 암반손상대가 처분터널 주변에 형성된 암반손상대보다 첨두온도에 더 큰 영향을 미친다. |
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