Occupational Radiation Dose Against the Annual Limits (10 CFR 20.1201)
Year-to-date occupational radiation dose as a percent of the NRC annual limits.
Open the tool → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- Unit of the doses
- mrem
- Total effective dose equivalent
- 1200
- Lens dose equivalent
- 3000
- Months of the monitoring year elapsed
- 4
Result: Highest: total effective dose equivalent at 24% of its limit.
The tool opens with these values already filled in. Replace them with your own.
What you enter
- Unit of the doses
- Total effective dose equivalent
- Deep-dose plus committed dose equivalent to the most exposed organ or tissue (not the lens)
- Lens dose equivalent
- Shallow-dose equivalent to the skin or an extremity
- Embryo or fetus, whole pregnancy so far (declared pregnancy)
- Months of the monitoring year elapsed (optional, for the projection)
How this is calculated
Citation
10 CFR 20.1201(a): annual occupational limits of 5 rem total effective dose equivalent, 50 rem to an organ or tissue, 15 rem to the lens and 50 rem to the skin or an extremity. 10 CFR 20.1208(a): 0.5 rem to the embryo or fetus over a declared pregnancy. Read the sources: 10 CFR 20.1201 ↗, 10 CFR 20.1208 ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.