Decommissioning the University of Iowa MC17 Cyclotron

Decommissioning the University of Iowa MC17 Cyclotron

Tom Hansen, CHP, PMPAmeriphysics, LLC

copyright 2011 - 1 - Ameriphysics, LLC

Introduction


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


Pre-Characterization


Characterization


Characterization


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


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


Package Ancillaries


Remove RF Shield


Material Handling


Loading and Shipping


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)


Decommissioning the University of Iowa MC17 Cyclotron

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