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Title: Computational and experimental forensics characterization of weapons-grade plutonium produced in a thermal neutron environment

The growing nuclear threat has amplified the need for developing diverse and accurate nuclear forensics analysis techniques to strengthen nuclear security measures. The work presented here is part of a research effort focused on developing a methodology for reactor-type discrimination of weapons-grade plutonium. To verify the developed methodology, natural UO 2 fuel samples were irradiated in a thermal neutron spectrum at the University of Missouri Research Reactor (MURR) and produced approximately 20 μg of weapons-grade plutonium test material. Radiation transport simulations of common thermal reactor types that can produce weapons-grade plutonium were performed, and the results are presented here. These simulations were needed to verify whether the plutonium produced in the natural UO 2 fuel samples during the experimental irradiation at MURR was a suitable representative to plutonium produced in common thermal reactor types. Also presented are comparisons of fission product and plutonium concentrations obtained from computational simulations of the experimental irradiation at MURR to the nondestructive and destructive measurements of the irradiated natural UO 2 fuel samples. Gamma spectroscopy measurements of radioactive fission products were mostly within 10%, mass spectroscopy measurements of the total plutonium mass were within 4%, and mass spectroscopy measurements of stable fission products were mostlymore » within 5%.« less
Authors:
 [1] ;  [2] ;  [3] ; ORCiD logo [3] ;  [2] ;  [4]
  1. Texas A & M Univ., College Station, TX (United States). Dept. of Nuclear Engineering
  2. Texas A & M Univ., College Station, TX (United States). Cyclotron Inst., and Dept. of Chemistry
  3. Texas A & M Univ., College Station, TX (United States). Center for Nuclear Security Science & Policy Initiatives
  4. Texas A & M Univ., College Station, TX (United States). Dept. of Nuclear Engineering, and Center for Nuclear Security Science & Policy Initiatives
Publication Date:
Grant/Contract Number:
NA0000979; NA0003180
Type:
Accepted Manuscript
Journal Name:
Nuclear Engineering and Technology
Additional Journal Information:
Journal Volume: 50; Journal Issue: 6; Journal ID: ISSN 1738-5733
Publisher:
Korean Nuclear Society
Research Org:
Univ. of California, Berkeley, CA (United States)
Sponsoring Org:
USDOE National Nuclear Security Administration (NNSA)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; Neutron Irradiation; Nuclear Forensics; Weapons-grade Plutonium
OSTI Identifier:
1501541

Osborn, Jeremy M., Glennon, Kevin J., Kitcher, Evans D., Burns, Jonathan D., Folden, Charles M., and Chirayath, Sunil S.. Computational and experimental forensics characterization of weapons-grade plutonium produced in a thermal neutron environment. United States: N. p., Web. doi:10.1016/j.net.2018.04.017.
Osborn, Jeremy M., Glennon, Kevin J., Kitcher, Evans D., Burns, Jonathan D., Folden, Charles M., & Chirayath, Sunil S.. Computational and experimental forensics characterization of weapons-grade plutonium produced in a thermal neutron environment. United States. doi:10.1016/j.net.2018.04.017.
Osborn, Jeremy M., Glennon, Kevin J., Kitcher, Evans D., Burns, Jonathan D., Folden, Charles M., and Chirayath, Sunil S.. 2018. "Computational and experimental forensics characterization of weapons-grade plutonium produced in a thermal neutron environment". United States. doi:10.1016/j.net.2018.04.017. https://www.osti.gov/servlets/purl/1501541.
@article{osti_1501541,
title = {Computational and experimental forensics characterization of weapons-grade plutonium produced in a thermal neutron environment},
author = {Osborn, Jeremy M. and Glennon, Kevin J. and Kitcher, Evans D. and Burns, Jonathan D. and Folden, Charles M. and Chirayath, Sunil S.},
abstractNote = {The growing nuclear threat has amplified the need for developing diverse and accurate nuclear forensics analysis techniques to strengthen nuclear security measures. The work presented here is part of a research effort focused on developing a methodology for reactor-type discrimination of weapons-grade plutonium. To verify the developed methodology, natural UO2 fuel samples were irradiated in a thermal neutron spectrum at the University of Missouri Research Reactor (MURR) and produced approximately 20 μg of weapons-grade plutonium test material. Radiation transport simulations of common thermal reactor types that can produce weapons-grade plutonium were performed, and the results are presented here. These simulations were needed to verify whether the plutonium produced in the natural UO2 fuel samples during the experimental irradiation at MURR was a suitable representative to plutonium produced in common thermal reactor types. Also presented are comparisons of fission product and plutonium concentrations obtained from computational simulations of the experimental irradiation at MURR to the nondestructive and destructive measurements of the irradiated natural UO2 fuel samples. Gamma spectroscopy measurements of radioactive fission products were mostly within 10%, mass spectroscopy measurements of the total plutonium mass were within 4%, and mass spectroscopy measurements of stable fission products were mostly within 5%.},
doi = {10.1016/j.net.2018.04.017},
journal = {Nuclear Engineering and Technology},
number = 6,
volume = 50,
place = {United States},
year = {2018},
month = {5}
}