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External exposure dose limits specified by international organizations
| Item | Organization | ||
|---|---|---|---|
| ICRP | NCRP | 1RR 1999 | |
| Radiation-controlled areas | |||
| External exposure dose limit | |||
| Year | 5 year average: 20 mSv | 50 mSv | 20 mSv |
| Accumulated dose | 5 year average: 20 mSv, yearly maximum: 50 mSv | 10 mSv×age | 5 year average: 100 mSv, yearly maximum: 50 mSv |
| Dose-equivalent annual limit (skin and other organs) | |||
| Lens | 150 mSv | 150 mSv | 150 (20) mSv |
| Skin | 500 mSv | 500 mSv | 500 mSv |
| Hands, feet | 500 mSv | 500 mSv | 500 mSv |
| General public areas | |||
| Effective annual dose limit | |||
| Continuous, frequent exposure | 1 mSv | 1 mSv | 1 mSv |
| Non-frequent exposure | - | 5 mSv | 5 mSv |
| Annual dose limit (skin and other organs) | |||
| Lens | 15 mSv | 15 mSv | 15 mSv |
| Skin | 50 mSv | 50 mSv | 50 mSv |
| Hands, feet | - | 50 mSv | 50 mSv |
ICRP, International Commission on Radiation Protection; NCRP, National Council on Radiation Protection and Measurements; IRR, Ionizing Radiation Regulations; -, not available.