Missing Dose from Mortality Studies of Radiation Effects Among Workers at Oak Ridge National Laboratory

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Missing dose is a problem that has not been adequately addressed in the mortality studies of radiation effects among workers at Oak Ridge National Laboratory. The missing dose is a result of recording a zero for below-detectable doses, especially for frequent (weekly) film badge readings. To make the thorough dosimetry assessment needed in the current Oak Ridge National Laboratory worker studies, it will probably be necessary to consider all data at hand including personnel dose records, daily pocket meter readings used to supplement weekly and quarterly readings from other dosimeters, and monitoring results from both building surveys and fixed stations. The fixed-station data should be extremely useful in developing a better understanding of the unusual temporal variation of the external radiation doses to Oak Ridge National Laboratory workers during the high exposurerate periods of the 1950s and early 1960s.

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