Table 10.
Used parameters for the exposure because of the processing of rare-earths. a indicates a particular value of the raw data.
| Symbol | Name | Value | Unit |
|---|---|---|---|
| E | Additional annual effective dose | mSv | |
| B | Breathing rate | 28.8 | m3 d−1 |
| t | Annual working hours | 2000 | h |
|
Equivalent activity of 232Th concentration in air | 3a | mBq m−3 |
| d’ | Dose coefficient of 232Th (medium, 5  ) |
29 |
Sv Bq−1
|
| J | Potential alpha energy concentration | 41a | mWL |
| u | Dose conversion factor from WLM to effective dose | 5 | mSv WLM−1 |
| m | Needed mass of neodymium per 3 MW turbine | 560 | kg |
|
External gamma exposure rate | 0.5a |
|
|
Background external gamma exposure rate | 0.15 |
|
| d | Conversion factor from dose rate to effective dose rate | 0.7 | Sv Gy−1 |
| M | Total mass of produced rare-earth metals | 3 600 000 | kg |
| N | Number of exposed persons working in processing plant | 380 |