Overview of Materials Disposition

Overview of Materials Disposition

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DOE Moratorium and SuspensionDOE Moratorium and Suspension

• Effective in 2000 • Moratorium prohibits the unrestricted release for

recycling of contaminated metals from radiological areas within DOE

• Suspension prohibits unrestricted release for recycling of radioactive and non-radioactive metals from radiological areas within DOE– No release for commercial use– Radiological Area: Radiation area, high radiation area,

contamination area, etc.• For beneficial reuse/recycling as well as alleviating

storage needs and disposal costs, SLAC needs to release some of the BaBar/PEP II components containing metals for recycling/reuse offsite.

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Path Forward for Suspension ReliefPath Forward for Suspension Relief

• Pantex successfully revised radiation area posting procedures to allow reclassification of the status for previously encumbered scrap in storage– Mainly surface contamination

• Most of SLAC materials – beamline components that are volumetrically activated

• SLAC proposed protocol:– Evaluation– Release Criteria– Assurance property meets requirements

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Expected MaterialsExpected Materials

• Copper cables of various diameters and lengths• Iron and steel plates, pipes• Concrete blocks• Electronic components and crates• Rubber and plastic hoses• Aluminum piping and components• Special items including the Be DIRC

5Materials Inside Accelerator Housing:RadioactiveMaterials Inside Accelerator Housing:Radioactive

Radioactive Materials:Path 1a – ReusePath 1b – Waste

Path 1aPath 1b

6Materials Inside Accelerator Housing:Non-Radioactive Non-MetalsMaterials Inside Accelerator Housing:Non-Radioactive Non-Metals

Non-Rad Non-Metals:Path 2a – Reuse offsitePath 2b – Reuse onsitePath 2c – DisposePath 2d – Hazmat

Path 2a Path 2cPath 2b

Path 2d

7Materials Inside Accelerator Housing:Non-Radioactive MetalsMaterials Inside Accelerator Housing:Non-Radioactive Metals

Non-Rad Metals:Path 3a – Reuse onsitePath 3b – “Hold”

Path 3a Path 3b

8Path Forward for Suspension Relief: EvaluationPath Forward for Suspension Relief: Evaluation

• Process knowledge• FLUKA calculations

– BaBar detector model– Other geometries model

• Confirmatory measurements– Measurement and survey protocols that follow

MARSSIM guidance• Gross beta-gamma field surveys• Gamma spectroscopy surveys• Portal monitor surveys

9Path Forward for Suspension Relief: Release CriteriaPath Forward for Suspension Relief: Release Criteria

• Clearance levels (Based on 1 mrem/yr): – ANSI N13.12-199 for volumetrically activated

materials• ~30 pCi/g

– DOE Order 5400.5 for surface contamination– Instrument MDA level

• 1/10 of ANSI & DOE levels

Only items below MDA would be released

10Path Forward for Suspension Relief:Assurance Property Meets RequirementsPath Forward for Suspension Relief:Assurance Property Meets Requirements

• Personnel will ensure that the calculations and surveys, project documentation, and component inventory and tracking process are of sufficient quality to meet proposed requirements.