Derived Air Concentration-Hour (DAC-Hour) 2


Derived Air Concentration-Hour (DAC-Hour) 2 : 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 derived air concentration-hours to represent one ALI equivalent to a committed effective dose equivalent of 5 rems (0.05 Sv)
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