Derived Air Concentration (DAC) 2
Derived Air Concentration (DAC) 2 : For the radionuclides listed in appendix A of this part, the airborne concentration that equals the ALl divided by the volume of air breathed by an average worker for a working year of2000 hours (assuming a breathing volume of 2400 m3). For the radionuclides listed in appendix C of this part, the air immersion DACs were calculated for a continuous, non-shielded exposure via in1mersion in a semi-infinite atmospheric cloud
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