Radioactivity concentration limits

Ciic = radioactivity concentration limit for nuclide i in medium k (i.e., air or water)... 

The terminology "radioactivity concentration limit is that used in the U.S. Federal Regulations. In the publications of the International Committee in Radiation Protection [II], a similar concentration limit is referred to as the maximum permissible concentration. ... 

Find the total volume of air in cubic meters that must be discharged through the stack with the tritium, krypton, and iodine so that human exposure does not exceed that from the radioactivity concentration limit (C) values of App. D. The total volume of air is the sum of the volumes needed to dilute each of the three radionuclides to the C values. 

Radioactive waste is any waste material—gas, liquid, or solid—whose radioactivity exceeds certain limits. These limits have been established by governments or by local authorities, guided by the recommendations of the International Commission on Radiation Protection (ICRP). The ICRP recommendations define the maximum permissible concentration (MPC) for each individual radionuclide and for mixtures of radionuclides in water or air. The U.S. regulation defines such limiting concentration as the radioactivity concentration limit (C), which is the terminology used in this text, Values of C for selected actinides and long-lived fission products in water or air are given in App. D. 

Four appendixes list fundamental physical constants, conversion tables, nuclide properties, and radioactivity concentration limits for nuclear plant effluents. 

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