工程地质学报Issue(2)：203-209,7.
膨润土在核废料处置环境中的膨胀衰减规律研究
NUMERICAL SIMULATION FOR DECAY OF SWELLING CAPACITY OF BENTONITE IN HIGH-LEVEL NUCLEAR WASTE REPOSITORY
摘要
Abstract
The hydrogeochemical reaction of the high-pressure bentonite in the high-level nuclear waste repository was simulated with the software Phreeqc.A one-dimensional transport model is established in consideration of the cation exchange of K+,Ca2+,Na+,Mg2+and mineral dissolution and precipitation reactions.The curves of the bentonite chemical components changing over time and space are obtained,which verifies that the decay in swelling capacity is mainly caused by the transformation from Na-montmorillonite into Ca-montmorillonite.The degree of decay in swelling capacity is evaluated.Decay coefficients of the GMZ and MX80 bentonite respectively reach 0.83 and 0.79 in the seawater and 0.91 and 0.90 in the underground water after 10000 years.关键词
Phreeqc/核废料处置/膨润土/水文地球化学/膨胀性Key words
Phreeqc/Nuclear waste repository/Bentonite/Hydrogeochemistry/Swelling capacity分类
天文与地球科学引用本文复制引用
姜昊,徐永福,项国圣..膨润土在核废料处置环境中的膨胀衰减规律研究[J].工程地质学报,2014,(2):203-209,7.基金项目
国家自然科学基金项目（41272318）资助． （）
