Collection, Validation, and Treatment of Data for a Mortality Study of Nuclear Industry Workers

Watkins, Janice P.; Cragle, Donna L.; Frome, E. L.; Reagan, Jeannie L.; West, Charles; Crawford‐Brown, Douglas; Tankersley, William G.

doi:10.1080/1047322x.1997.10389488

Cited by 24 publications

(18 citation statements)

References 19 publications

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“…Mean cumulative external dose at FMPC (13.4 mGy) was slightly larger than that estimated for the Y-12 uranium facility by Watkins et al 22 (mean 8.7 mGy) and Checkoway et al 23 (mean 9.6 mGy). Dupree-Ellis et al 24 estimated a mean cumulative external dose of 48 mGy for the Mallinckrodt uranium processing facility.…”

Section: Discussioncontrasting

confidence: 54%

Exposure assessment for a cohort of workers at a former uranium processing facility

Anderson

Daniels

Fleming

et al. 2012

J Expo Sci Environ Epidemiol

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Section: Discussioncontrasting

confidence: 54%

Exposure assessment for a cohort of workers at a former uranium processing facility

Anderson

Daniels

Fleming

et al. 2012

J Expo Sci Environ Epidemiol

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“…We evaluate the use of a`nearby' procedure, originally developed for estimating missing annual external dosimetry data among workers employed at the Oak Ridge X -10 and Y-12 facilities, for calculating estimated values for missing annual external dosimetry records (Watson et al, 1994;Watkins et al, 1997 ).…”

Section: Introductionmentioning

confidence: 99%

Missing annual external radiation dosimetry data among Hanford workers

Richardson

Wing

Watson

et al. 1999

J Expo Sci Environ Epidemiol

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Epidemiological studies of workers employed at the Hanford Site have been underway for nearly 30 years. Although the external radiation dosimetry program at Hanford has been fairly comprehensive, some workers included in previous epidemiological analyses have periods of employment during which there are missing annual external radiation dosimetry records. In this report, employment history records and annual external dosimetry records have been used to investigate the extent of missing annual external dosimetry records for workers at the Hanford facility. A``nearby'' procedure for estimating values for missing annual external dosimetry records was evaluated. Among the 33,459 workers who were employed at least 180 days and had at least one annual external dosimetry record, annual external dosimetry records were missing for 8% of the years of employment ( 32,323 missing annual external dosimetry records ) . Missing annual external dosimetry records were more common for female Hanford workers than for male workers, and for workers employed in the early years of Hanford's operation than for workers employed in later years of operation. The nearby procedure provided reliable estimates of values for missing annual external dosimetry records. Using this procedure, 18,937.5 mSv were estimated for missing annual external dosimetry records; this was 2% of the total recorded cumulative external radiation dose for these workers. Missing annual external dosimetry records should be considered as a potential source of bias and uncertainty in investigations of radiation ± cancer associations among Hanford workers.

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“…At other nuclear facilities in the US and in Britain, researchers have reported that results of external radiation dosimeters that were between zero and MDL were, in some periods, recorded as zero ( Strom, 1986;Inskip et al, 1987; National Research Council, Committee on Film Badge Dosimetry in Atmospheric Nuclear Tests, 1989;Cardis and Esteve, 1991;Taylor, 1991;Kerr, 1994;Wing et al, 1994;Tankersley et al, 1996;Mitchell et al, 1997;Watkins et al, 1997 ). Similar concerns have been raised about the Hanford dosimetry data (Kneale et al, 1991 ).…”

Section: Discussionmentioning

confidence: 99%

Evaluation of annual external radiation doses at values near minimum detection levels of dosimeters at the Hanford nuclear facility

Richardson

Wing

Watson

et al. 2000

J Expo Sci Environ Epidemiol

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In epidemiological studies of workers exposed to ionizing radiation, recognition of the limitations of available radiation dosimetry data is important to interpretation of a study's findings. This paper provides an investigation of external radiation dosimetry data for workers at the Hanford nuclear facility, focusing on changes over time in practices for recording dosimetry measurements that were between zero and the minimum detectable level of a radiation dosimeter. Reported annual external radiation doses for the years 1944 ± 1989 were examined for 33,459 workers; these records are the sum of periodic dosimetry measurements within a calendar year. For each year, the proportion of annual external doses with values in the range of minimum detectable level was examined. Contrary to previous researchers, we conclude that there is evidence that dosimetry measurements with values between zero and the minimum detectable level may have been recorded as zero in some historical periods. This conclusion is supported by evidence drawn from historical documentation about radiation dosimetry practices at the Hanford facility. Although workers at the Hanford facility have relatively complete and detailed external radiation dosimetry data compared to some other nuclear facilities that began operation in the 1940s, these data may suffer limitations related to dosimetry recording practices at the facility.

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Collection, Validation, and Treatment of Data for a Mortality Study of Nuclear Industry Workers

Cited by 24 publications

References 19 publications

Exposure assessment for a cohort of workers at a former uranium processing facility

Exposure assessment for a cohort of workers at a former uranium processing facility

Missing annual external radiation dosimetry data among Hanford workers

Evaluation of annual external radiation doses at values near minimum detection levels of dosimeters at the Hanford nuclear facility

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