Accelerator Safety Workshop SLAC. Progress on Metals Moratorium Initiative August 17-19, 2010. Scott L. Davis Accelerator Safety Program Manager – SC- 31.1 Office of Science, U.S. Department of Energy. Background.
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Progress on Metals Moratorium Initiative
August 17-19, 2010
Scott L. Davis
Accelerator Safety Program Manager – SC- 31.1
Office of Science, U.S. Department of Energy
Since July 13, 2000, DOE/SC has been prohibited from releasing materials such as scrap metal from radiation areas into general commerce.
The Secretarial Moratorium and Suspension was originally to be in place for 6 months, the prohibition was extended indefinitely on January 19, 2001 until improvements were made to radiological clearance processes associated with the release of personal property.
All NNSA Sites have been reviewed
EM has conducted one site review
Two SC Sites have been reviewed to date, SLAC and TJ
Each Site has consistently implemented the prohibition with a conservative approach
Both demonstrated they had encumbered metal and equipment that could be ultimately be introduced into the reuse/scrap stream
Higher costs for operations, research and development with no increased benefit
Review of site radiological clearance practices
Radioactive Materials Workshop
Accelerator Working Group Release Criteria
Institute an SC Investment Recovery Process with emphasis on improved operations:
Indistinguishable from Background (IFB): Materials that are IFB can have unrestricted release and are not subject to further regulatory control.
Greater that IFB but less that ANSI N13.12: The ANSI N13.12 Clearance Level (based on an annual dose criterion of 1 mrem/yr) should be considered as DOE pre-approved Authorized Limits for materials that may be volumetrically activated. This provides for a consistent technical basis on which to base release protocols and allows for effective regulation of those protocols.
Greater than ANSI N13.12: Materials with induced activity above the ANSI N13.12 Clearance Levels may be released through the current DOE Order 5400.5 Derived Authorized Limit process. This is consistent with requirements in the DOE Order 5400.5 and DOE Order 458.1 draft for volumetric