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Relative hazard of the various radioactive materials
An equation is given for the relative hazard, H, of various radionuclides under uniform working conditions. H is defined as the ratio of the average muC/cc inhaled in the working area to the maximum permissible concentration, MPC, of the radionuclide for occupational exposure. The variation of H is discussed in relation to such parameters as radioactive and biological half lives of the radionuclides, fractional retention, dilution factors, specific activity, energy, RBE, relative damage factor, n, mass of the critical organ, and the maximum permissible does to the critical organ. Comparisons are made with values of H obtained by this and other investigations. The values of H obtained by this method appear to be consistent with estimates from operational experience. A table of values of specific activity, (MPC)/sub c/ and relative hazard, H, is given for the radionuclides listed in ICRP Publication No. 2, p.us values for a number of additional transuranic elements not previously listed by the ICRP.. (auth