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Calculating Radon Doses

716 bytes added, 6 March
Undo revision 326 by Admin (talk)
In simplest terms, calculating the dose from inhaling radon involves multiplying the average radon level (e.g. in [[Radon: Units of Measure|Bq/m<sup>3</sup>]]) by the time spent, and the right [[ICRPædia Guide to Dose Coefficients|dose coefficient]].
<center> ''[[Absorbed, Equivalent, and Effective Dose|Effective dose]] = radon level × time × [[ICRPædia Guide to Dose Coefficients|dose coefficient]]'' </center>Using the [[ICRPædia Guide to Dose Coefficients|dose coefficient]] for most circumstances of occupational exposure, breathing air with 50 [[Radon: Units of Measure|Bq/m<sup>3</sup>]] of radon (a typical worldwide value in buildings) for one year at work (2000 hours) gives an [[Absorbed, Equivalent, and Effective Dose|effective dose]] of 0.7 mSv. For working indoors doing substantial physical activity, or for exposures in tourist caves, the recommended [[ICRPædia Guide to Dose Coefficients|dose coefficient]] is higher, so breathing air with 50 [[Radon: Units of Measure|Bq/m<sup>3</sup>]] of radon for one year at work gives an [[Absorbed, Equivalent, and Effective Dose|effective dose]] of 1.4 mSv.
 
 
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'''Radon Protection Strategy: ''Publication 126'' paragraphs 41-45'''
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'''Occupational Intakes of Radionuclides, Part 3: ''Publication 137'' paragraphs 57-60'''
For the specific situations of work indoors involving substantial physical activity, and exposures in tourist caves, the Commission recommends a dose coefficient of 6 mSv per mJ h m-3 (approximately 20 mSv per WLM). Using the standard assumption of F = 0.4 for most situations, 6 mSv per mJ h m-3 corresponds to 1.4 x 10-5 mSv per Bq h m-3.
In cases where aerosol characteristics are significantly different from typical conditions; sufficient, reliable aerosol data are available; and, estimated doses warrant more detailed consideration, it is possible to calculate site-specific dose coefficients using the data provided…
 
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