Table 5 Cumulative leaching balance (90Sr vs. 137Cs) from Ash sample with water (V ≈ 125 ml), uncertainty of 90Sr activity is 10–15% when 137Cs – below 20% where applicable.
Sample, code | Ash code | Weight of ash, g (~) | Nuclide | Washed, Bq | Residue, Bq | Total, Bq | Washed up, % |
|---|---|---|---|---|---|---|---|
Wood I | S-II | 0.2 | 90Sr | 31.6 | 104.0 | 135.6 | 23.3% |
137Cs | 0.36 | < 0.05 | ≈ 0.36 | ≈ 89% | |||
Wood I | S-III | 0.2 | 90Sr | 19.4 | 98.0 | 117.4 | 16.5% |
137Cs | 0.41 | < 0.05 | ≈ 0.41 | ≈ 89% | |||
Wood II | S-IV | 0.1 | 90Sr | 4.2 | 12.0 | 16.2 | 25.9% |
137Cs | 0.37 | < 0.05 | ≈ 0.37 | ≈ 89% | |||
Wood III | S-V | 0.1 | 90Sr | 34.4 | 70.0 | 104.4 | 33.0% |
137Cs | 0.79 | < 0.05 | ≈ 0,79 | ≈ 89% | |||
Wood IV | S-VI | 0.1 | 90Sr | 90.8 | 251.0 | 341.8 | 26.6% |
137Cs | 1.59 | 0.2 | 1.79 | 89 ± 4% | |||
Wood IV | S-VII | 0.1 | 90Sr | 38.3 | 280.0 | 318.3 | 12.0% |
137Cs | 2.0 | 0.23 | 2.23 | 89 ± 3% | |||
96/36 A | A | 0.1 | 90Sr | 6.8 | 55.9 | 62.7 | 10.8% |
137Cs | 2.8 | 5.2 | 8.0 | 35.0 ± 2.5% | |||
96/36 B | B | 0.1 | 90Sr | 12.3 | 78.8 | 91.8 | 13.5% |
137Cs | 6.5 | 80 | 86.5 | 7.5 ± 1.5% | |||
6/36 C | C | 0.17 | 90Sr | 64.0 | 494 | 558 | 11.5% |
137Cs | 8.0 | 715 | 723 | 1.1 ± 0.5% |
