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In-air and in-water performance comparison of Passive Gamma Emission Tomography with activated Co-60 rods
A first-of-a-kind geological repository for spent nuclear fuel is being built in Finland and will soon start operations. To make sure all nuclear material stays in peaceful use, the fuel is measured with two complementary non-destructive methods to verify the integrity and the fissile content of the...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
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Nature Publishing Group UK
2023
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10533838/ https://www.ncbi.nlm.nih.gov/pubmed/37758755 http://dx.doi.org/10.1038/s41598-023-42978-2 |
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author | Virta, Riina Bubba, Tatiana A. Moring, Mikael Siltanen, Samuli Honkamaa, Tapani Dendooven, Peter |
author_facet | Virta, Riina Bubba, Tatiana A. Moring, Mikael Siltanen, Samuli Honkamaa, Tapani Dendooven, Peter |
author_sort | Virta, Riina |
collection | PubMed |
description | A first-of-a-kind geological repository for spent nuclear fuel is being built in Finland and will soon start operations. To make sure all nuclear material stays in peaceful use, the fuel is measured with two complementary non-destructive methods to verify the integrity and the fissile content of the fuel prior to disposal. For pin-wise identification of active fuel material, a Passive Gamma Emission Tomography (PGET) device is used. Gamma radiation emitted by the fuel is assayed from 360 angles around the assembly with highly collimated CdZnTe detectors, and a 2D cross-sectional image is reconstructed from the data. At the encapsulation plant in Finland, there will be the possibility to measure in air. Since the performance of the method has only been studied in water, measurements with mock-up fuel were conducted at the Atominstitut in Vienna, Austria. Four different arrangements of activated Co-60 rods, steel rods and empty positions were investigated both in air and in water to confirm the functionality of the method. The measurement medium was not observed to affect the ability of the method to distinguish modified rod positions from filled rod positions. More extended conclusions about the method performance with real spent nuclear fuel cannot be drawn from the mock-up studies, since the gamma energies, activities, material attenuations and assembly dimensions are different, but full-scale measurements with spent nuclear fuel are planned for 2023. |
format | Online Article Text |
id | pubmed-10533838 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-105338382023-09-29 In-air and in-water performance comparison of Passive Gamma Emission Tomography with activated Co-60 rods Virta, Riina Bubba, Tatiana A. Moring, Mikael Siltanen, Samuli Honkamaa, Tapani Dendooven, Peter Sci Rep Article A first-of-a-kind geological repository for spent nuclear fuel is being built in Finland and will soon start operations. To make sure all nuclear material stays in peaceful use, the fuel is measured with two complementary non-destructive methods to verify the integrity and the fissile content of the fuel prior to disposal. For pin-wise identification of active fuel material, a Passive Gamma Emission Tomography (PGET) device is used. Gamma radiation emitted by the fuel is assayed from 360 angles around the assembly with highly collimated CdZnTe detectors, and a 2D cross-sectional image is reconstructed from the data. At the encapsulation plant in Finland, there will be the possibility to measure in air. Since the performance of the method has only been studied in water, measurements with mock-up fuel were conducted at the Atominstitut in Vienna, Austria. Four different arrangements of activated Co-60 rods, steel rods and empty positions were investigated both in air and in water to confirm the functionality of the method. The measurement medium was not observed to affect the ability of the method to distinguish modified rod positions from filled rod positions. More extended conclusions about the method performance with real spent nuclear fuel cannot be drawn from the mock-up studies, since the gamma energies, activities, material attenuations and assembly dimensions are different, but full-scale measurements with spent nuclear fuel are planned for 2023. Nature Publishing Group UK 2023-09-27 /pmc/articles/PMC10533838/ /pubmed/37758755 http://dx.doi.org/10.1038/s41598-023-42978-2 Text en © The Author(s) 2023 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) . |
spellingShingle | Article Virta, Riina Bubba, Tatiana A. Moring, Mikael Siltanen, Samuli Honkamaa, Tapani Dendooven, Peter In-air and in-water performance comparison of Passive Gamma Emission Tomography with activated Co-60 rods |
title | In-air and in-water performance comparison of Passive Gamma Emission Tomography with activated Co-60 rods |
title_full | In-air and in-water performance comparison of Passive Gamma Emission Tomography with activated Co-60 rods |
title_fullStr | In-air and in-water performance comparison of Passive Gamma Emission Tomography with activated Co-60 rods |
title_full_unstemmed | In-air and in-water performance comparison of Passive Gamma Emission Tomography with activated Co-60 rods |
title_short | In-air and in-water performance comparison of Passive Gamma Emission Tomography with activated Co-60 rods |
title_sort | in-air and in-water performance comparison of passive gamma emission tomography with activated co-60 rods |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10533838/ https://www.ncbi.nlm.nih.gov/pubmed/37758755 http://dx.doi.org/10.1038/s41598-023-42978-2 |
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