Definition of Derived Air Concentration-Hour (DAC-hour)

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TeachMeFinance.com - explain Derived Air Concentration-Hour (DAC-hour)



Derived Air Concentration-Hour (DAC-hour)

The term 'Derived Air Concentration-Hour (DAC-hour)' as it applies to the area of nuclear science can be defined as ' The product of the concentration of radioactive material in air (expressed as a fraction or multiple of the derived air concentration for each radionuclide) and the time of exposure to that radionuclide, in hours. A licensee may take 2,000 DAC-hours to represent one annual limit on intake (ALI), equivalent to a committed effective dose equivalent of 5 rems (0.05 Sv). '.

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Mark McCracken

Author: Mark McCracken is a corporate trainer and author living in Higashi Osaka, Japan. He is the author of thousands of online articles as well as the Business English textbook, "25 Business Skills in English".


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