From: Effect of reducing groundwater on the retardation of redox-sensitive radionuclides
A. Distribution coefficients (K d , mL/g) for radionuclides sorbed to alluvium in synthetic J-13 water | |||||||||
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Test ID | Test Condition | Sr | Tc-99 | I | Cs | Re | Np-237 | U | Pu-242 |
A | atm | 50.4 ± 1.65 | (-0.099) ± 0.064 | 0.74 ± 0.02 | 2078 ± 304 | (-0.20) ± 0.07 | 52.3 ± 4.40 | 23.9 ± 1.93 | 437 ± 147 |
B | 1% O2 | 50.6 ± 0.54 | (-0.052) ± 0.035 | 0.35 ± 0.09 | 2275 ± 415 | (-0.03) ± 0.05 | 77.4 ± 2.48 | 1022 ± 114 | 520 ± 188 |
C | 0.1% O2 | 54.5 ± 1.41 | (-0.097) ± 0.009 | 0.50 ± 0.18 | 2439 ± 363 | (-0.28) ± 0.26 | 85.1 ± 1.83 | 782 ± 7.06 | 376 ± 62.5 |
D | 11 ppm FeCl2 | 56.6 ± 9.65 | (-0.255) ± 0.107 | 0.99 ± 0.82 | 2617 ± 475 | 0.014 ± 0.44 | 91.0 ± 7.15 | 1155 ± 490 | 518 ± 436 |
E | 24 ppm Na2S | 50.6 ± 0.52 | 0.114 ± 0.019 | 0.56 ± 0.25 | 3663 ± 92.4 | 0.44 ± 0.05 | 93.8 ± 2.83 | 182 ± 70.4 | 342 ± 277 |
B. Distribution coefficient ( K d , mL/g) for radionuclides sorbed to devitrified tuff in synthetic J-13 water | |||||||||
Test ID | Test Condition | Sr | Tc-99 | I | Cs | Re | Np-237 | U | Pu-242 |
A | atm | 26.0 ± 2.60 | 1.22 ± 0.62 | 0.43 ± 0.83 | 79.6 ± 9.35 | 0.20 ± 0.48 | 4.55 ± 0.75 | 6.64 ± 0.35 | 164 ± 83.4 |
B | 1% O2 | 26.5 ± 0.77 | 2.10 ± 1.00 | 0.49 ± 0.20 | 89.6 ± 6.65 | 0.15 ± 0.029 | 20.9 ± 6.34 | 226 ± 68.2 | 168 ± 149 |
C | 0.1% O2 | 30.2 ± 0.38 | 12.5 ± 4.41 | 0.64 ± 0.12 | 96.1 ± 4.00 | 0.020 ± 0.025 | 36.5 ± 8.40 | 89.4 ± 6.93 | 798 ± 70.6 |
D | 11 ppm FeCl2 | 27.7 ± 1.16 | 19.1 ± 11.4 | 0.90 ± 0.38 | 99.5 ± 6.40 | 0.263 ± 0.245 | 69.6 ± 30.7 | 139 ± 34.7 | (-83.5) ± 56.5 |
E | 24 ppm Na2S | 25.4 ± 0.92 | 378 ± 98.0 | 0.61 ± 0.13 | 105 ± 6.08 | 0.56 ± 0.29 | 930 ± 462 | 268 ± 42.6 | 15.2 ± 81.7 |
C. Distribution coefficients ( K d , mL/g) for radionuclides sorbed to carbonate rock in synthetic LCA water | |||||||||
Test ID | Test Condition | Sr | Tc-99 | I | Cs | Re | Np-237 | U | Pu-242 |
A | atm | 0.96 ± 0.32 | 0.24 ± 0.12 | 0.72 ± 0.03 | 0.33 ± 0.11 | 0.012 ± 0.092 | 255 ± 39.1 | 2.22 ± 0.63 | 116 ± 8.00 |
B | 1% O2 | 0.50 ± 0.07 | 0.12 ± 0.16 | (-0.11) ± 0.01 | 0.19 ± 0.12 | (-0.11) ± 0.05 | 228 ± 16.1 | 2.96 ± 0.28 | 162 ± 12.6 |
C | 0.1% O2 | 0.98 ± 0.12 | 0.38 ± 0.08 | 0.39 ± 0.29 | 0.37 ± 0.07 | 0.23 ± 0.07 | 314 ± 36.5 | 3.31 ± 0.14 | 156 ± 27.6 |
D | 11 ppm FeCl2 | 1.37 ± 0.39 | 0.81 ± 0.45 | 0.52 ± 0.35 | 0.67 ± 0.45 | 0.32 ± 0.35 | 402 ± 55.1 | (-3.93) ± 0.03 | 0.13 ± 198 |
E | 24 ppm Na2S | 0.89 ± 0.39 | 0.41 ± 0.33 | 0.38 ± 0.35 | 0.28 ± 0.33 | (-0.07) ± 0.31 | 440 ± 18.1 | (-2.60) ± 0.10 | (-0.14) ± 0.50 |
D. Distribution coefficients ( K d , mL/g) for radionuclides sorbed to to zeolitic tuff in TCU water | |||||||||
Test ID | Test Condition | Sr | Tc-99 | I | Cs | Re | Np-237 | U | Pu-242 |
A | atm | 1080 ± 350 | 0.28 ± 0.11 | (-0.70) ± 0.12 | 278 ± 76.6 | (-0.14) ± 0.21 | 2.21 ± 0.35 | 1.79 ± 0.30 | 25.1 ± 2.04 |
B | 1% O2 | 2637 ± 932 | 0.19 ± 0.01 | 0.79 ± 0.39 | 1164 ± 306 | 0.049 ± 0.039 | 2.07 ± 0.10 | 1.37 ± 0.34 | 65.3 ± 17.0 |
C | 0.1% O2 | 1587 ± 382 | 0.045 ± 0.022 | 0.17 ± 0.20 | 1065 ± 183 | (-0.069) ± 0.029 | 2.31 ± 0.20 | 4.12 ± 0.09 | 66.8 ± 7.61 |
D | 11 ppm FeCl2 | 14264 ± 12586 | 0.11 ± 0.032 | 0.07 ± 0.71 | 16762 ± 15951 | (-0.039) ± 0.057 | 0.74 ± 0.083 | 7.25 ± 0.56 | 61.0 ± 46.0 |
E | 24 ppm Na2S | 1019 ± 612 | 0.61 ± 0.10 | 0.70 ± 0.14 | 1790 ± 2208 | 0.64 ± 0.88 | 3.93 ± 1.64 | 8.21 ± 2.53 | 30.0 ± 98.7 |