Table 2.
Distribution of the doses to lung, cumulated over all modes of exposure and the entire careers of the Rocketdyne workers monitored for radiation exposure (Boice et al. 2006).
| Career lung dose (mSv) | Number of workers | Percentage of workers |
|---|---|---|
| <5 | 3,683 | 64.0 |
| 5 – 9 | 609 | 10.6 |
| 10 – 49 | 1,039 | 18.0 |
| 50 – 99 | 203 | 3.5 |
| 100 – 199 | 113 | 2.0 |
| ≥200 | 109 | 1.9 |
| All | 5,756b | 100 |
a
The highest lung doses are mainly due to high-LET radiation (intakes of UAlx); most of the small doses are due to low-LET radiation (external irradiation from photons).
b
Excluding 45 workers who were not monitored for external irradiation and were subjected to very low levels of dose from internal irradiation.