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Long Term Temperature and Humidity Evolution Forecast in Near Field of Nuclear Waste Container |
Received:July 13, 2018 Revised:October 25, 2018 |
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DOI:10.7643/ issn.1672-9242.2018.10.0018 |
KeyWord:nuclear waste disposal repository temperature and humidity corrosion evolution |
Author | Institution |
HUANG Yan-liang |
1. Institute of Oceanology, Chinese Academy of Sciences, Qingdao ,China; 2. Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao , China |
ZHENG Min |
1. Institute of Oceanology, Chinese Academy of Sciences, Qingdao ,China; 3. University of Chinese Academy of Sciences, Beijing , China |
ZHANG Qi-chao |
1. Institute of Oceanology, Chinese Academy of Sciences, Qingdao ,China; 2. Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao , China; 3. University of Chinese Academy of Sciences, Beijing , China |
LU Dong-zhu |
1. Institute of Oceanology, Chinese Academy of Sciences, Qingdao ,China; 2. Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao , China |
WANG Xiu-tong |
1. Institute of Oceanology, Chinese Academy of Sciences, Qingdao ,China; 2. Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao , China |
KUNTE Hans-Jörg |
4. Federal Institute for Materials Research and Testing, Berlin D-12205, Germany |
SAND Wolfgang |
5. Donghua University, College of Environmental Science and Engineering, Shanghai , China;6. Technical University and Mining Academy Freiberg, Freiberg D-09596, Germany; 7. University Duisburg-Essen, Essen D-47057, Germany |
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Abstract: |
The paper aims to simulate the corrosion environment of nuclear waste containers at different geological disposal periods to obtain temperature and humidity information at the interface between the container and the surrounding environment. The simulated data and calculation results of long term temperature evolution at the surface of nuclear waste (HLW) containers from some typical nuclear countries about the safety disposition were reviewed. Combining different burial patterns, this paper speculated the long term temperature evolution rule for China. According to the study about saturation variation of buffer/backfill material at home and abroad, the humidity evolution of bentonite at the surface of HLW containers was speculated. The study showed that the temperature of the container surface increased rapidly at the beginning, and gradually decreased after the climax. For safety reasons, the maximum temperature was designed below 100℃. The saturation of bentonite was affected by the mutual influences of the heat released by nuclear waste decay and the infiltration of groundwater. It was dominated by the released heat in the early stage, and later was influenced greatly by the infiltration of groundwater. It is generally believed that the water content at the surface of the container will increase obviously in about 3 years, and will be saturated in about 10 years. The prediction of long-term temperature and humidity evolution will lay a foundation for study of corrosion evolution of nuclear waste containers in China. |
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