Post on 17-Feb-2016
description
Decommissioning the University of Iowa MC17 Cyclotron
Tom Hansen, CHP, PMPAmeriphysics, LLC
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Introduction
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Introduction
Scanditronix MC17 particle accelerator • 18O(p,n)18F• 14N(d,n)15O • 14N (p,α)11C• 16O(p,α)13N
Operated @ 30 uA, 6 hours/week for last 10 years
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Pre-Characterization
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Characterization
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Characterization
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Major Activation Products Primary Source
Be-7 target material
Na-22aluminum, magnesium
Na-24 aluminumSc-48 titaniumCr-51 target material
Mn-52 target materialMn-54 copper, brassCo-56 target materialMn-56 copper, brassCo-57 target materialNi-57 nickelCo-58 nickelFe-59 ironCo-60 copper, concreteZn-65 copper, brass
Sb-124alloys in solder and
ball bearings
Total Activity: 137 mCi
Characterization
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0 2 4 6 8 10 12 14 16 18 201.00E-06
1.00E-05
1.00E-04
1.00E-03
1.00E-02
1.00E-01
1.00E+00
1.00E+01
1.00E+02
Series1 Be-7
Na-22 Na-24
Sc-48 Cr-51
Mn-52 Mn-54
Co-56 Mn-56
Co-57 Ni-57
Co-58 Fe-59
Co-60 Zn-65
Sb-124
Time (years)
Activ
ity (m
Ci)
Courtesy: John Sunderland, Ph.D.
Establish Removal Path
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Establish Removal Path
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Establish Removal Path
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Package Ancillaries
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Package Ancillaries
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Remove RF Shield
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Material Handling
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Material Handling
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Material Handling
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Material Handling
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Material Handling
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Material Handling
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Material Handling
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Material Handling
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Material Handling
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Loading and Shipping
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Loading and Shipping
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Loading and Shipping
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Loading and Shipping
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Project Metrics
• LLRW shipped for disposal: 48,000 lbs. • Time: 324 person-hours over 3 day period• Cost: ~$200,000• Dose: 53 person-mrem (16 mrem max
exposed individual)
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