Table 1.
Estimated distribution of 137Cs activity on particles of specified diameters.
| Activity (%) of total |
|||
|---|---|---|---|
| Median particle diameter, μm (range) |
MI 137Cs distribution |
Alternate 137Cs distribution #1 |
Alternate 137Cs distribution #2 |
| 5 (2.5 - 7.5) | 12.5 | 16.6 | 23.6 |
| 10 (7.5 - 12.5) | 11.0 | 11.6 | 11.7 |
| 15 (12.5 - 17.5) | 10.0 | 9.3 | 7.5 |
| 20 (17.5 - 22.5) | 9.0 | 8.1 | 5.3 |
| 25 (22.5 - 27.5) | 8.0 | 6.9 | 3.9 |
| 30 (27.5 - 32.5) | 7.0 | 6.2 | 3.0 |
| 35 (32.5 - 37.5) | 6.5 | 5.4 | 2.4 |
| 40 (37.5 - 42.5) | 6.0 | 5.0 | 2.0 |
| 45 (42.5 - 47.5) | 5.5 | 4.4 | 1.6 |
| 50 (47.5 - 52.5) | 5.0 | 3.7 | 1.4 |
| 55 (52.5 - 57.5) | 4.5 | 3.3 | 1.2 |
| 60 (57.5 - 62.5) | 4.0 | 2.9 | 1.0 |
| 65 (62.5 - 67.5) | 3.5 | 2.6 | 0.9 |
| 70 (67.5 - 72.5) | 2.5 | 2.3 | 0.8 |
| 75 (72.5 - 77.5) | 1.8 | 2.0 | 0.7 |
| 80 (77.5 - 82.5) | 1.2 | 1.8 | 0.6 |
| 85 (82.5 - 87.5) | 0.9 | 1.5 | 0.6 |
| 90 (87.5 - 92.5) | 0.7 | 1.4 | 0.5 |
| 95 (92.5 - 97.5) | 0.3 | 1.2 | 0.5 |
| 100+ | ≤0.1 | ≤1.0 | <1.0 |