development of the hanford site profile · developing the site profile • hanford site profile...
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Development of theHanford Site Profile
Bill MurrayOak Ridge Associated
Universities Team
January 13 and 14, 2004
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Purpose of Meeting
• Discuss the Hanford Site Profile.• Describe how the Site Profile is used.• Ask for suggestions and information.• Document concerns and issues.• Answer questions.
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Energy Employees
Occupational Illness
Compensation Program Act
(EEOICPA)
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Department of Labor
Department of Healthand Human Services – NIOSH
Oak Ridge AssociatedUniversities Team
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ORAU Team
• Oak Ridge Associated Universities
• Dade Moeller & Associates
• MJW Corporation
• Sub-contractors
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ORAU Program Goals
• Protect claimant privacy.
• Build trust and confidence.
• Process claims accurately and efficiently.
• Avoid conflicts of interest.
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Dose
Reconstruction
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Occupational Radiation Dose
Occupational Medical Dose
Occupational Environmental Dose
Internal Dose
External Dose
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Site Profiles SupportDose Reconstruction
• Used by dose reconstructors.• Provide site-specific technical information.• Minimize interpretation of data.• Living document.
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General Information
• Completed Site Profiles can be seen at http://www.cdc.gov/niosh/ocas .
• Comments are encouraged and should be sent to the NIOSH Docket Office.
• Meetings are being held with union representatives to encourage input.
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Developing the Site Profile
• Document written by subject experts.• Document reviewed by
NIOSH and ORAU Team.• Document approved for use
by NIOSH and ORAU.
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Developing the Site Profile
• Hanford Site Profile teamwas established in April 2003.
• Team leader is Ed Scalsky.• Sections were written by different authors.• Rev. 00 was completed October 15, 2003.• Revisions are in progress.
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Contents of Site Profile
• Purpose and Scope• Site Description• Occupational Medical Dose• Occupational Environmental Dose• Occupational Internal Dosimetry• Occupational External Dosimetry
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Purpose and Scope
• Used in reconstructing radiation doses to workers at Hanford Site.
• Covers the time from 1942 to the present.• Uncertainties in data evaluated also.• Claimant-favorable assumptions used.
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Site Description
• Brief description of the facilities and processes on the site over the years
• Radioactive materials present• Potential internal exposure routes• Potential external exposure routes
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Hanford Site
• Reactors – nine production, seven R&D• Chemical separations – REDOX, PUREX• Fuel fabrication• Waste handling• Radionuclides – Pu, U, Th, Np, 3H, FP
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Occupational Medical Dose(X-rays)
• Frequency of chest X-rays• Equipment and techniques used• Organ dose calculations• Uncertainty in dose• Dose reconstructor instructions
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Occupational X-rays
• Employer required• Annual requirement though 1959• Equipment used changed over time• Older equipment had higher doses• Not included in DOE dose record
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Occupational Environmental Dose(for Unmonitored Workers)
• Internal dose from on-site radioactive materials in the air– On-site releases to air– Annual intakes from air concentrations
• Occupational external dose– Ambient radiation
• Uncertainty• Dose reconstructor instructions
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Environmental Dose
• Unmonitored workers• Internal component
Intake from inhalation of radionuclides• External component
Submersion in radioactive cloud – 41ARadiation sources in soil, waste pits,buildings, etc.
• Not included in DOE dose record
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Occupational Internal Dosimetry
• Methods and practices• Sources of exposure• Minimum detectable activity (MDA) for:
- Whole Body Counting- Bioassay
• Reporting levels• Uncertainty• Dose reconstructor instructions
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Internal Dosimetry
• Bioassay program started in 1947• In vitro urinalysis for Pu, Am, Cu, tritium,
U, FP, Sr, Pm, Po, Np• In vivo counting
Whole body counter – 1959Thyroid counter – 1956Chest counter – 1967
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Occupational External Dosimetry
• Methods and practices• Sources of exposure• Adjustments to recorded dose• Minimum detectable levels (MDLs)• Uncertainty• Dose reconstructor instructions
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External Dosimetry
• Dosimeter technologyBeta/photon – 1944 to presentNeutron – prior to 1950 to present
• Calibration• Exchange frequency• Workplace radiation fields• Exposure geometry
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In Conclusion
• Developing a usable Site Profileis an important task.
• Site Profiles are living documents.• Additional information is being sought and
will be used when it adds to the document.• Send comments to NIOSH Docket Office
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NIOSH Docket OfficeYou can contact the Docket Office at:
Department of Health and Human ServicesNational Institute for Occupational
Safety and Health (NIOSH)4676 Columbia Parkway MS-C34Cincinnati, OH 45226Telephone: (513) 533-8450Fax: (513) 533-8285email: [email protected]