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Mobile Radiation Exclusion Zone Calculator

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  • Mobile Radiation Exclusion Zone Calculator
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GamCPR Calculator Isotope Decay Geometric Unsharpness RT Conversion Tool IQI SmartSelect Film Placement Rad Exclusion Zone

Mobile Radiation Exclusion Zone Calculator

Area Classification ? Dose Rate Limit ? Min. Radius ?
Enter the source activity, durations and isotope to calculate mobile radiation boundaries.
How to interpret these results:

The distances shown are the minimum calculated radial distances measured from the centre of the radioactive source in all directions (360°). For example, if the result is 20 m, a boundary with a radius of 20 m should be established around the source position.

Mobile radiography calculations account for the proportion of time that the source is exposed during the total operation duration. This allows the exclusion boundary to be adjusted based on the actual exposure time.

Calculations are based on accepted industrial gamma constants and inverse square law calculations under open air conditions without shielding or collimation. Actual exclusion distances may vary depending on shielding, scatter radiation, source geometry, local regulations, customer requirements and site specific conditions.

These values are provided as a planning aid only and must always be verified by the responsible Radiation Protection Officer (RPO) or Radiation Safety Officer (RSO).

Errors and omissions excepted.

Visualizing the Zones

Unlike fixed installations, mobile zones factor in the ratio of exposure time against total operational time. This allows for boundary adjustments reflecting actual time-weighted exposure.

View GamCPR Close Proximity System