Radiation exposure assessment for portsmouth naval shipyard health studies
| Autor: | Timothy D. Taulbee, Pi-Hsueh Chen, Robert D. Daniels |
|---|---|
| Rok vydání: | 2004 |
| Předmět: |
Shipyard
Radiation Dosage Risk Assessment Whole-Body Counting Radiation Protection Nuclear Reactors Risk Factors Occupational Exposure Range (statistics) Medicine Humans Radiology Nuclear Medicine and imaging Maine Naval Medicine Radiometry Ships Nuclear Warfare Radiation Radiological and Ultrasound Technology Cumulative dose business.industry Public Health Environmental and Occupational Health General Medicine Collective dose Radiation exposure Body Burden business Algorithms Demography Arithmetic mean |
| Zdroj: | Radiation protection dosimetry. 111(2) |
| ISSN: | 0144-8420 |
| Popis: | Occupational radiation exposures of 13,475 civilian nuclear shipyard workers were investigated as part of a retrospective mortality study. Estimates of annual, cumulative and collective doses were tabulated for future dose-response analysis. Record sets were assembled and amended through range checks, examination of distributions and inspection. Methods were developed to adjust for administrative overestimates and dose from previous employment. Uncertainties from doses below the recording threshold were estimated. Low-dose protracted radiation exposures from submarine overhaul and repair predominated. Cumulative doses are best approximated by a hybrid log-normal distribution with arithmetic mean and median values of 20.59 and 3.24 mSv, respectively. The distribution is highly skewed with more than half the workers having cumulative doses10 mSv and95% having doses100 mSv. The maximum cumulative dose is estimated at 649.39 mSv from 15 person-years of exposure. The collective dose was 277.42 person-Sv with 96.8% attributed to employment at Portsmouth Naval Shipyard. |
| Databáze: | OpenAIRE |
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