By National Council on Radiation Protection and Measurements
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Extra resources for Exposure of the U.S. Population from Occupational Radiation: Recommendations of the National Council on Radiation Protection and Measurements (N C R P Report)
08 (ICRP, 1981). 3 NUCLEAR POWER PRODUCTION / 35 ratio of the average exposure level to the exposure limit then the underground uranium mines are still ranked number 1. They are ranked number 2 if collective effective dose equivalent is the concern. The combination of external exposure with the effective dose equivalent from radon decay products results in an average annual dose equivalent of the order of 10 to 20 mSv (1to 2 rem). 3 Uranium Mills The primary radiological hazards in uranium mills are caused by 23eUand 234U(Fry, 1975).
3 show the trends in annual average dose equivalent and collective dose equivalents for BWRs and PWRs for the years 1974 to 1985. 2). 1 is attributable to an increase in the number of workers during these years. The decrease in the annual collective dose equivalent in 1985 was disproportionately large compared to the decrease in the number of nuclear power plant employees in 1985 and is attributable to efforts to reduce exposures, reduced modification work, and reduced major repair and replacement work (Driscoll, 1988).
Data. MISCELLANEOUS: Education Transportation Early dose distributions in education and transportation for the years 1960,1965and 1970 were based on academic and transportation licensee data in the AEC 1966-1971 film badge studies. Dose distributions in 1975 and 1980 were estimated from commercial dosimetry data. Estimates of exposed faculty and staff were based on rough estimates of program offerings to students, that involved radiation courses. Estimates based on NRC studies. BASIS FOR POPULATION ESTIMATE DOSE DATA BASE NUCLEAR FUEL CYCLE: I ci' Dose distribution for nuclear power reactors in 1970 Estimates obtained from NRC reports.