A NATURAL ANALOG OF HIGH PH CEMENT PORE WATERS FROM THE MAQARIN AREA OF NORTHERN JORDAN .2. RESULTS OF PREDICTIVE GEOCHEMICAL CALCULATIONS

被引:37
作者
ALEXANDER, WR
DAYAL, R
EAGLESON, K
EIKENBERG, J
HAMILTON, E
LINKLATER, CM
MCKINLEY, IG
TWEED, CJ
机构
[1] UNIV BERN,INST GEOL,CH-3012 BERN,SWITZERLAND
[2] ONTARIO HYDRO,CIVIL RES,TORONTO,ONTARIO,CANADA
[3] PAUL SCHERRER INST,VILLIGEN,SWITZERLAND
[4] NAGRA,WETTINGEN,SWITZERLAND
[5] UKAEA,HARWELL OX11 0RA,BERKS,ENGLAND
关键词
Geochemical codes - High pH cement pore waters - Maqarin; Jordan;
D O I
10.1016/0375-6742(92)90104-G
中图分类号
P3 [地球物理学]; P59 [地球化学];
学科分类号
0708 ; 070902 ;
摘要
Chemical thermodynamic models (geochemical codes) are extensively used in the performance assessment of radioactive waste repositories. The applicability of such models (and their databases) can be tested by comparison of predictions of elemental solubility and speciation with observations in nature. This is particularly difficult for the hyperalkaline conditions found within cement-filled repositories but the rather anomalous geochemistry of the Maqarin area provides an ideal opportunity for such comparisons. This paper presents the first model predictions of the solubility and speciation of U, Th, Ra, Pb, Se, Sn and Ni which were made in advance of the sampling exercise presented in a companion paper (Khoury et al., this issue). Initial results indicate the significance of defining the major Ni, Se and Sn phases in detail and suggest that such work is of little use for U due to large uncertainties in the solute speciation databases.
引用
收藏
页码:133 / 146
页数:14
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