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Image reconstruction of shielded mixed-oxide fuel using a dual-particle imaging system

Journal Article · · Nuclear Science Symposium and Medical Imaging Conference record
 [1];  [2];  [2];  [3];  [2];  [2];  [2];  [4];  [4]
  1. Univ. of Michigan, Ann Arbor, MI (United States); University of Michigan
  2. Univ. of Michigan, Ann Arbor, MI (United States)
  3. Nagoya Univ., Chikusa-ku (Japan)
  4. Joint Research Center, Varese (Italy)
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The dual-particle imaging system being developed at the University of Michigan was used at the Joint Research Centre in Ispra, Italy for measurements on samples of special nuclear material. A 1,150-g mixed-oxide (MOX) fuel sample was measured with various shielding configurations to determine how the presence of lead and/or polyethylene shielding degrades the system's ability to localize a source by simultaneous neutron and photon imaging. Three two-hour measurements were taken with the source shielded by an: a) 8-mm lead sheath and 5.1-cm lead bricks, b) 8-mm lead sheath and 6.5-cm polyethylene bricks, and c) 8-mm lead sheath, 5.1-cm lead bricks, and 6.5-cm polyethylene bricks. The 8-mm lead sheath was used in all cases to reduce the measured photon count rate. A “bare” measurement was also made by using only the 8-mm lead sheath, but the unexpected presence of additional sources has rendered the measurement unsuitable for comparison. Here, the resulting images show that the dual-particle imaging system is able to accurately localize the MOX canister in the presence of intervening material.

Research Organization:
Univ. of Michigan, Ann Arbor, MI (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA), Office of Nonproliferation and Verification Research and Development (NA-22)
Grant/Contract Number:
NA0002481; NA0002534; NE0000324; AC04-94AL85000
OSTI ID:
1582001
Journal Information:
Nuclear Science Symposium and Medical Imaging Conference record, Journal Name: Nuclear Science Symposium and Medical Imaging Conference record Vol. 2014; ISSN 1091-0026
Publisher:
IEEECopyright Statement
Country of Publication:
United States
Language:
English

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46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY