摘要
为获得核废料储罐与周围环境界面的温湿度信息,以便模拟不同地质处置时期储罐表面的腐蚀环境,通过对一些典型核能利用国家在高放核废料安全处置研究中对储罐表面温度的长期演变计算进行调研,结合不同埋藏模式推测出适于我国的核废料储罐表面温度演变规律。同时根据国内外对核废料储库中缓冲/回填材料饱和度的变化情况推测我国核废料储罐表面环境中膨润土含水量的时间演变趋势。研究表明,储罐表面初始时温度快速升高,至温度峰值后逐渐下降,为安全起见,最高温应设计低于100℃。膨润土的饱和度受到核废料衰变释热及地下水入渗的双重影响,早期以核废料衰变主导,后来受地下水入渗影响显著。一般认为储罐表面膨润土在3年左右含水量明显增加,约10年左右达到饱和。温湿度长期演变预测将为我国核废料储罐表面腐蚀演变研究奠定基础。
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.
作者
黄彦良
郑珉
张琦超
路东柱
王秀通
KUNTE Hans-Jorg
SAND Wolfgang
HUANG Yan-liang;ZHENG Min;ZHANG Qi-chao;LU Dong-zhu;WANG Xiu-tong;KUNTE Hans-J？rg;SAND Wolfgang(Institute of Oceanology,Chinese Academy of Sciences,Qingdao 266071,China;Center for Ocean Mega-Science,Chinese Academy of Sciences,Qingdao 266071,China;University of Chinese Academy of Sciences,Beijing 100049,China;Fed-eral Institute for Materials Research and Testing,Berlin D-12205,Germany;College of Environmental Science and Engi-neering,Donghua University,Shanghai 201620,China;Technical University and Mining Academy Freiberg,Freiberg D-09596,Germany;University Duisburg-Essen,Essen D-47057,Germany)
出处
《装备环境工程》
CAS
2018年第10期109-113,共5页
Equipment Environmental Engineering
基金
国家自然科学基金(51471160)
关键词
核废料
处置库
温湿度
腐蚀演变
nuclear waste
disposal repository
temperature and humidity
corrosion evolution
