JAEA-Research-2010-034.pdf:16.23MB - JAEAの研究開発成果 ...

JAEA-Research 2010-034
Contents
1. Introduction ··········································································································································· 1
2. Numerical simulation system on the coupled thermo-hydro-mechanical-chemical model ····················· 4
2.1 Outline of the coupling system ········································································································ 4
2.2 Outline of the numerical simulation flow ························································································· 4
3. Modeling on the coupled thermo-hydro-mechanical-chemical processes ············································ 6
3.1 Outline of modeling ························································································································· 6
3.2 Thermal characteristic ······················································································································ 8
3.2.1 Governing equation ··················································································································· 8
3.2.2 Coupling parameters on heat flow ····························································································· 9
3.3 Hydraulic characteristic ················································································································· 10
3.3.1 Governing equation ················································································································· 10
3.3.2 Coupling parameters on hydraulic flow ·················································································· 12
3.3.3 Estimation of vapor mass ········································································································ 16
3.4 Mechanical characteristic ··············································································································· 19
3.4.1 Governing equation ················································································································· 19
3.4.2 Coupling parameters on mechanical behavior ········································································· 25
3.5 Mass transportation ························································································································ 27
3.5.1 Mass transportation in liquid phase ························································································· 27
3.5.2 Mass transportation in gas phase ····························································································· 30
3.5.3 Criteria for numerical stability ································································································ 31
3.5.4 Boundary condition ················································································································· 32
3.5.5 Coupling parameters on mass transportation ··········································································· 32
3.6 Geochemical characteristic ············································································································ 33
3.6.1 Governing equiation················································································································ 33
3.6.2 Modeling of geochemical reaction in the unsaturated buffer material ····································· 37
4. Verification of the modeling ·············································································································· 41
4.1 Comparison analysis against TOUGHREACT ··············································································· 41
4.1.1 Outline of the comparative cases and input parameters ··························································· 41
4.1.2 Results ···································································································································· 45
4.2 Verification analysis against laboratory tests for salt accumulation/precipitation ··························· 52
4.2.1 Outline of the laboratory tests ································································································· 52
4.2.2 Inferring of the pore water chemistry in the buffer material ···················································· 59
4.2.3 Input parameters and boundary conditions ·············································································· 65
4.2.4 Results ···································································································································· 68
5. Numerical simulation on chemical changes in the near-field ····························································· 80
5.1 Data setting on the assumed geological environment ····································································· 80
5.1.1 Thermal characteristic ················································································································ 80
5.1.2 Mechanical characteristic ··········································································································· 81
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