DISCREPANCIES IN COMMITTED EFFECTIVE DOSE EQUIVALENTS CALCULATED USING US-NUCLEAR-REGULATORY-COMMISSION REGULATORY-GUIDE-8.34

Calculations of Committed Effective Dose Equivalent (CEDE) due to inha lation using four of the five methods suggested in the United States N uclear Regulatory Commission Regulatory Guide 8.34 (1992a) were perfor med to determine if any significant differences in the calculated valu e of the CEDE exist for typical power plant radionuclides. These four methods included dose conversion factors from the United States Enviro nmental Protection Agency Federal Guidance Report No. 11 (Eckerman et al. 1988), Annual Limit on Intake, Derived Air Concentrations, and Wei ghted Committed Dose Equivalents from ICRP Publication 30 (1979). Of t he 68 radionuclides included, 48 demonstrated significant differences of 20% or greater in the calculated CEDE values for the four methods u sed. The differences in calculated values for the CEDE can be explaine d by the varied use of the 10% Rule and by rounding of tabulated value s for ALIs and DACs to one significant digit.