Long-term non-isothermal reactive transport model of compacted bentonite, concrete and corrosion products in a HLW repository in clay
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- 作者：Alba Mon ; Javier Samper ; j.samper@udc.es ; Luis Montenegro ; Acacia Naves ; Jesú ; s Ferná ; ndez
- 关键词：Reactive transport ; Compacted bentonite barrier ; Corrosion products ; Concrete ; Radioactive waste disposal ; Hyper-alkaline pH front ; CORE2D
- 刊名：Journal of Contaminant Hydrology
- 出版年：2017
- 出版时间：February 2017
- 年：2017
- 卷：197
- 期：Complete
- 页码：1-16
- 全文大小：2690 K
- 卷排序：197
文摘
Canister corrosion and concrete degradation lead to precipitation of secondary minerals and porosity reduction. The reduction of the porosities becomes especially relevant for t > 10,000 years. Pore clogging zones at the canister-bentonite and concrete-clay interfaces after 1 Ma are 1 and 3.3 cm thick, respectively. The hyperalkaline front (pH > 8) extends 2.5 m into the clay formation after 1 Ma. Our simulation results share the features of the models reported by others for similar engineered barrier systems.