| Samples | Type | HR (mSv/year) |
| CG 4 | Grey | 0.385 ± 0.033 |
| CG 3 | Grey | 0.513 ± 0.021 |
| CG 2 | Grey | 0.451 ± 0.036 |
| CB1 | White | 0.252 ± 0.021 |
| CG 1 | Grey | 0.358 ± 0.031 |
| CIPR | -- | 1 |