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Title: Non-contact measurement of partial gas pressure and distribution of elemental composition using energy-resolved neutron imaging

Abstract

Neutron resonance absorption imaging is a non-destructive technique that can characterize the elemental composition of a sample by measuring nuclear resonances in the spectrum of a transmitted beam. Recent developments in pixelated time-of-flight imaging detectors coupled with pulsed neutron sources pose new opportunities for energy-resolved imaging. In this paper we demonstrate non-contact measurements of the partial pressure of xenon and krypton gases encapsulated in a steel pipe while simultaneously passing the neutron beam through high-Z materials. The configuration was chosen as a proof of principle demonstration of the potential to make non-destructive measurement of gas composition in nuclear fuel rods. The pressure measured from neutron transmission spectra (~739 ± 98 kPa and ~751 ± 154 kPa for two Xe resonances) is in relatively good agreement with the pressure value of ~758 ± 21 kPa measured by a pressure gauge. This type of imaging has been performed previously for solids with a spatial resolution of ~ 100 μm. In the present study it is demonstrated that the high penetration capability of epithermal neutrons enables quantitative mapping of gases encapsulate within high-Z materials such as steel, tungsten, urania and others. This technique may be beneficial for the non-destructive testing of bulk compositionmore » of objects (such as spent nuclear fuel assemblies and others) containing various elements opaque to other more conventional imaging techniques. As a result, the ability to image the gaseous substances concealed within solid materials also allows non-destructive leak testing of various containers and ultimately measurement of gas partial pressures with sub-mm spatial resolution.« less

Authors:
 [1];  [2]; ORCiD logo [2];  [2];  [2];  [2];  [1]
  1. Univ. of California, Berkeley, CA (United States)
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
Research Org.:
NOVA Scientific Inc., Sturbridge, MA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1362037
Grant/Contract Number:  
FG02-07ER86322; FG02-08ER86353; SC0009657
Resource Type:
Accepted Manuscript
Journal Name:
AIP Advances
Additional Journal Information:
Journal Volume: 7; Journal Issue: 1; Journal ID: ISSN 2158-3226
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY

Citation Formats

Tremsin, A. S., Losko, A. S., Vogel, S. C., Byler, D. D., McClellan, K. J., Bourke, M. A. M., and Vallerga, J. V. Non-contact measurement of partial gas pressure and distribution of elemental composition using energy-resolved neutron imaging. United States: N. p., 2017. Web. doi:10.1063/1.4975632.
Tremsin, A. S., Losko, A. S., Vogel, S. C., Byler, D. D., McClellan, K. J., Bourke, M. A. M., & Vallerga, J. V. Non-contact measurement of partial gas pressure and distribution of elemental composition using energy-resolved neutron imaging. United States. doi:10.1063/1.4975632.
Tremsin, A. S., Losko, A. S., Vogel, S. C., Byler, D. D., McClellan, K. J., Bourke, M. A. M., and Vallerga, J. V. Tue . "Non-contact measurement of partial gas pressure and distribution of elemental composition using energy-resolved neutron imaging". United States. doi:10.1063/1.4975632. https://www.osti.gov/servlets/purl/1362037.
@article{osti_1362037,
title = {Non-contact measurement of partial gas pressure and distribution of elemental composition using energy-resolved neutron imaging},
author = {Tremsin, A. S. and Losko, A. S. and Vogel, S. C. and Byler, D. D. and McClellan, K. J. and Bourke, M. A. M. and Vallerga, J. V.},
abstractNote = {Neutron resonance absorption imaging is a non-destructive technique that can characterize the elemental composition of a sample by measuring nuclear resonances in the spectrum of a transmitted beam. Recent developments in pixelated time-of-flight imaging detectors coupled with pulsed neutron sources pose new opportunities for energy-resolved imaging. In this paper we demonstrate non-contact measurements of the partial pressure of xenon and krypton gases encapsulated in a steel pipe while simultaneously passing the neutron beam through high-Z materials. The configuration was chosen as a proof of principle demonstration of the potential to make non-destructive measurement of gas composition in nuclear fuel rods. The pressure measured from neutron transmission spectra (~739 ± 98 kPa and ~751 ± 154 kPa for two Xe resonances) is in relatively good agreement with the pressure value of ~758 ± 21 kPa measured by a pressure gauge. This type of imaging has been performed previously for solids with a spatial resolution of ~ 100 μm. In the present study it is demonstrated that the high penetration capability of epithermal neutrons enables quantitative mapping of gases encapsulate within high-Z materials such as steel, tungsten, urania and others. This technique may be beneficial for the non-destructive testing of bulk composition of objects (such as spent nuclear fuel assemblies and others) containing various elements opaque to other more conventional imaging techniques. As a result, the ability to image the gaseous substances concealed within solid materials also allows non-destructive leak testing of various containers and ultimately measurement of gas partial pressures with sub-mm spatial resolution.},
doi = {10.1063/1.4975632},
journal = {AIP Advances},
number = 1,
volume = 7,
place = {United States},
year = {2017},
month = {1}
}

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    Works referencing / citing this record:

    ImagingReso: A Tool for Neutron Resonance Imaging
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