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Title: Hybrid Gama Emission Tomography (HGET): FY16 Annual Report

Abstract

Current International Atomic Energy Agency (IAEA) methodologies for the verification of fresh low-enriched uranium (LEU) and mixed oxide (MOX) fuel assemblies are volume-averaging methods that lack sensitivity to individual pins. Further, as fresh fuel assemblies become more and more complex (e.g., heavy gadolinium loading, high degrees of axial and radial variation in fissile concentration), the accuracy of current IAEA instruments degrades and measurement time increases. Particularly in light of the fact that no special tooling is required to remove individual pins from modern fuel assemblies, the IAEA needs new capabilities for the verification of unirradiated (i.e., fresh LEU and MOX) assemblies to ensure that fissile material has not been diverted. Passive gamma emission tomography has demonstrated potential to provide pin-level verification of spent fuel, but gamma-ray emission rates from unirradiated fuel emissions are significantly lower, precluding purely passive tomography methods. The work presented here introduces the concept of Hybrid Gamma Emission Tomography (HGET) for verification of unirradiated fuels, in which a neutron source is used to actively interrogate the fuel assembly and the resulting gamma-ray emissions are imaged using tomographic methods to provide pin-level verification of fissile material concentration.

Authors:
 [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1]
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1390447
Report Number(s):
PNNL-26213
DN4001030
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY

Citation Formats

Miller, Erin A., Smith, Leon E., Wittman, Richard S., Campbell, Luke W., Deshmukh, Nikhil S., Zalavadia, Mital A., Batie, Margo A., and Mozin, Vladimir V.. Hybrid Gama Emission Tomography (HGET): FY16 Annual Report. United States: N. p., 2017. Web. doi:10.2172/1390447.
Miller, Erin A., Smith, Leon E., Wittman, Richard S., Campbell, Luke W., Deshmukh, Nikhil S., Zalavadia, Mital A., Batie, Margo A., & Mozin, Vladimir V.. Hybrid Gama Emission Tomography (HGET): FY16 Annual Report. United States. doi:10.2172/1390447.
Miller, Erin A., Smith, Leon E., Wittman, Richard S., Campbell, Luke W., Deshmukh, Nikhil S., Zalavadia, Mital A., Batie, Margo A., and Mozin, Vladimir V.. Wed . "Hybrid Gama Emission Tomography (HGET): FY16 Annual Report". United States. doi:10.2172/1390447. https://www.osti.gov/servlets/purl/1390447.
@article{osti_1390447,
title = {Hybrid Gama Emission Tomography (HGET): FY16 Annual Report},
author = {Miller, Erin A. and Smith, Leon E. and Wittman, Richard S. and Campbell, Luke W. and Deshmukh, Nikhil S. and Zalavadia, Mital A. and Batie, Margo A. and Mozin, Vladimir V.},
abstractNote = {Current International Atomic Energy Agency (IAEA) methodologies for the verification of fresh low-enriched uranium (LEU) and mixed oxide (MOX) fuel assemblies are volume-averaging methods that lack sensitivity to individual pins. Further, as fresh fuel assemblies become more and more complex (e.g., heavy gadolinium loading, high degrees of axial and radial variation in fissile concentration), the accuracy of current IAEA instruments degrades and measurement time increases. Particularly in light of the fact that no special tooling is required to remove individual pins from modern fuel assemblies, the IAEA needs new capabilities for the verification of unirradiated (i.e., fresh LEU and MOX) assemblies to ensure that fissile material has not been diverted. Passive gamma emission tomography has demonstrated potential to provide pin-level verification of spent fuel, but gamma-ray emission rates from unirradiated fuel emissions are significantly lower, precluding purely passive tomography methods. The work presented here introduces the concept of Hybrid Gamma Emission Tomography (HGET) for verification of unirradiated fuels, in which a neutron source is used to actively interrogate the fuel assembly and the resulting gamma-ray emissions are imaged using tomographic methods to provide pin-level verification of fissile material concentration.},
doi = {10.2172/1390447},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed Feb 01 00:00:00 EST 2017},
month = {Wed Feb 01 00:00:00 EST 2017}
}

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