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Title: Spectroscopic fast neutron transmission imaging in a treaty verification setting

Abstract

Measurements of the geometric configuration of objects and their material composition are needed for nuclear treaty verification purposes. We experimentally demonstrate a simple method based on monoenergetic fast neutron transmission to realize crude imaging of the geometric configuration of special nuclear material, confirm its fissionable content, and obtain information on its approximate fissile mass. In the experiment, we used monoenergetic neutrons from D(d, n)3He and T(d, n)4He reactions and a linear array of liquid scintillation detectors to perform spectroscopic neutron imaging of up to 13.7 kg of highly enriched uranium in a spherical geometry. We also show an example of detection of material diversion and confirm the presence of fissionable material based on the measurement of high-energy prompt fission neutrons, including estimating the quantity of material from the comparison of measured and predicted fission neutron emission rate. The combination of crude imaging and fissionable material detection and quantification in a simple approach may be attractive in certain treaty verification scenarios.

Authors:
 [1];  [1];  [1]
+ Show Author Affiliations
  1. Univ. of Michigan, Ann Arbor, MI (United States)
Publication Date:
Research Org.:
Univ. of Michigan, Ann Arbor, MI (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1499138
Alternate Identifier(s):
OSTI ID: 1415665
Grant/Contract Number:  
NA0002534
Resource Type:
Accepted Manuscript
Journal Name:
AIP Advances
Additional Journal Information:
Journal Volume: 8; Journal Issue: 1; Journal ID: ISSN 2158-3226
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS

Citation Formats

Ogren, K., Nattress, J., and Jovanovic, I. Spectroscopic fast neutron transmission imaging in a treaty verification setting. United States: N. p., 2018. Web. doi:10.1063/1.5004698.
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Ogren, K., Nattress, J., & Jovanovic, I. Spectroscopic fast neutron transmission imaging in a treaty verification setting. United States. https://doi.org/10.1063/1.5004698
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Ogren, K., Nattress, J., and Jovanovic, I. Thu . "Spectroscopic fast neutron transmission imaging in a treaty verification setting". United States. https://doi.org/10.1063/1.5004698. https://www.osti.gov/servlets/purl/1499138.
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@article{osti_1499138,
title = {Spectroscopic fast neutron transmission imaging in a treaty verification setting},
author = {Ogren, K. and Nattress, J. and Jovanovic, I.},
abstractNote = {Measurements of the geometric configuration of objects and their material composition are needed for nuclear treaty verification purposes. We experimentally demonstrate a simple method based on monoenergetic fast neutron transmission to realize crude imaging of the geometric configuration of special nuclear material, confirm its fissionable content, and obtain information on its approximate fissile mass. In the experiment, we used monoenergetic neutrons from D(d, n)3He and T(d, n)4He reactions and a linear array of liquid scintillation detectors to perform spectroscopic neutron imaging of up to 13.7 kg of highly enriched uranium in a spherical geometry. We also show an example of detection of material diversion and confirm the presence of fissionable material based on the measurement of high-energy prompt fission neutrons, including estimating the quantity of material from the comparison of measured and predicted fission neutron emission rate. The combination of crude imaging and fissionable material detection and quantification in a simple approach may be attractive in certain treaty verification scenarios.},
doi = {10.1063/1.5004698},
journal = {AIP Advances},
number = 1,
volume = 8,
place = {United States},
year = {Thu Jan 04 00:00:00 EST 2018},
month = {Thu Jan 04 00:00:00 EST 2018}
}
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https://doi.org/10.1063/1.5004698
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