GEOCHEMICAL PREDICTIONS FOR A HYPOTHETICAL REPOSITORY LOCATED IN CRYSTALLINE ROCK — COMPARATIVE EVALUATION OF DIFFERENT RESEARCH TEAMS
Geological disposal of high-level radioactive wastes (HLW) relies on the concept of multiple barrier systems. In order to predict the long-term performance of the barriers, numerical models haven been developed. These models are applied to simulate the complex coupled thermo-hydro-mechanic-chemical (THMC) processes in the near field. This paper describes the models developed for the coupled thermo-hydro-chemical processes and simulation results performed by three research teams within the international DECOVALEX project. Good agreements in ionic concentration distributions and dissolution/precipitation of minerals by the modelling of a simplified case (FEBEX-type repository). Heat generation from the HLW canister affects the saturation and reactive transport processes especially in the near field. As a consequence, the geochemical reactions (e.g. dissolution/precipitation) cause long-term porosity and permeability changes of the barriers.
M.Xie E.Sonnenthal W.Wang O.Kolditz J.T.Birkholzer J.Rutqvist Y.Oda M.Chijimatsu
ZAG, University of Tuebingen, Tuebingen, Germany Lawrence Berkeley National Laboratory, Berkeley, USA Japan Atomic Energy Agency, Tokai, Japan Hazama Cooperation, Tokyo, Japan
国际会议
南京
英文
386-393
2006-05-22（万方平台首次上网日期，不代表论文的发表时间）