Table 1. Typical radionuclides and their radioprotection-relevant parameters, including their maximum amount not to exceed the 185 MBq limit for both solids and liquids under RAD-2 condition (sample in underpressurized glovebox during measurements).
| Nuclide (decay) | Half-life (years) | Specific activity (Bq mg−1) | Exemption limit (Bq) | Maximum amount (mg) |
|---|---|---|---|---|
| Tc-99 (β−) | 2.1 × 105 | 6.4 × 105 | 1.0 × 107 | 2.9 × 104 |
| Po-209 (α) | 1.0 × 102 | 6.2 × 108 | 1.0 × 104 | 3.0 × 10−1 |
| Ra-226 (α) | 1.6 × 103 | 3.7 × 107 | 1.0 × 104 | 5.0 × 100 |
| Th-nat (α) | 1.4 × 1010 | 8.2 × 100 | 1.0 × 104 | 2.3 × 107 |
| Pa-231 (α) | 3.3 × 104 | 1.7 × 106 | 1.0 × 103 | 1.1 × 102 |
| U-nat (α) | 4.5 × 109 | 2.6 × 101 | 1.0 × 104 | 7.1 × 106 |
| Np-237 (α) | 2.1 × 106 | 2.6 × 104 | 1.0 × 103 | 7.1 × 103 |
| Pu-239 (α) | 2.4 × 104 | 2.3 × 106 | 1.0 × 104 | 8.0 × 101 |
| Pu-242 (α) | 3.7 × 105 | 1.5 × 105 | 1.0 × 104 | 1.2 × 103 |
| Am-243 (α) | 7.4 × 103 | 7.4 × 106 | 1.0 × 103 | 2.5 × 101 |
| Cm-246 (α) | 4.8 × 103 | 1.1 × 107 | 1.0 × 103 | 1.7 × 101 |
| Cm-248 (α) | 3.4 × 105 | 1.6 × 105 | 1.0 × 103 | 1.2 × 103 |
| Bk-247 (α) | 1.4 × 103 | 3.8 × 107 | 1.0 × 104 | 4.9 × 100 |
| Cf-251 (α) | 9.0 × 102 | 5.8 × 107 | 1.0 × 103 | 3.2 × 100 |