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Spent Nuclear Fuel passive gamma analysis and reproducibility : Application to SKB-50 assemblies

Solans, Virginie ; Sjöstrand, Henrik ; Jansson, Peter ; Schillebeeckx, Peter ; Grape, Sophie ; Branger, Erik and Sjöland, Anders LU (2023) In Annals of Nuclear Energy 192.
Abstract

This work studies the reproducibility of passive gamma spectroscopy measurements for spent nuclear fuels (SNFs). The fifty assemblies used for this study span over a variety of initial enrichments, burnups, and cooling times. These SNFs have been measured in two different gamma axial measurement campaigns. The net peak counts are determined for Cs-137, Eu-154 and Cs-134. Furthermore, a sensitivity analysis of the relative position of the SNF and the detector is performed. Most importantly, this work describes a methodology using an intrinsic self-calibration procedure that can be used to compare the relative activities of the radionuclides without the need for detailed knowledge about the measurement set-up and its properties. The... (More)

This work studies the reproducibility of passive gamma spectroscopy measurements for spent nuclear fuels (SNFs). The fifty assemblies used for this study span over a variety of initial enrichments, burnups, and cooling times. These SNFs have been measured in two different gamma axial measurement campaigns. The net peak counts are determined for Cs-137, Eu-154 and Cs-134. Furthermore, a sensitivity analysis of the relative position of the SNF and the detector is performed. Most importantly, this work describes a methodology using an intrinsic self-calibration procedure that can be used to compare the relative activities of the radionuclides without the need for detailed knowledge about the measurement set-up and its properties. The reproducibility of the Cs-137 net peak count rate ranges between 2% and 4%. Systematic reproducibility of the ratio of Eu-154 and Cs-134 to Cs-137 is between 0,4% - 5 % using the intrinsic self-calibration method.

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author
; ; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Gamma measurements, Reproducibility, SKB-50, SNF
in
Annals of Nuclear Energy
volume
192
article number
109941
publisher
Elsevier
external identifiers
  • scopus:85161998442
ISSN
0306-4549
DOI
10.1016/j.anucene.2023.109941
language
English
LU publication?
yes
id
3fd5bb93-aba0-40dc-a6f5-1caa74dd9561
date added to LUP
2023-08-29 14:30:54
date last changed
2023-08-29 14:30:54
@article{3fd5bb93-aba0-40dc-a6f5-1caa74dd9561,
  abstract     = {{<p>This work studies the reproducibility of passive gamma spectroscopy measurements for spent nuclear fuels (SNFs). The fifty assemblies used for this study span over a variety of initial enrichments, burnups, and cooling times. These SNFs have been measured in two different gamma axial measurement campaigns. The net peak counts are determined for Cs-137, Eu-154 and Cs-134. Furthermore, a sensitivity analysis of the relative position of the SNF and the detector is performed. Most importantly, this work describes a methodology using an intrinsic self-calibration procedure that can be used to compare the relative activities of the radionuclides without the need for detailed knowledge about the measurement set-up and its properties. The reproducibility of the Cs-137 net peak count rate ranges between 2% and 4%. Systematic reproducibility of the ratio of Eu-154 and Cs-134 to Cs-137 is between 0,4% - 5 % using the intrinsic self-calibration method.</p>}},
  author       = {{Solans, Virginie and Sjöstrand, Henrik and Jansson, Peter and Schillebeeckx, Peter and Grape, Sophie and Branger, Erik and Sjöland, Anders}},
  issn         = {{0306-4549}},
  keywords     = {{Gamma measurements; Reproducibility; SKB-50; SNF}},
  language     = {{eng}},
  publisher    = {{Elsevier}},
  series       = {{Annals of Nuclear Energy}},
  title        = {{Spent Nuclear Fuel passive gamma analysis and reproducibility : Application to SKB-50 assemblies}},
  url          = {{http://dx.doi.org/10.1016/j.anucene.2023.109941}},
  doi          = {{10.1016/j.anucene.2023.109941}},
  volume       = {{192}},
  year         = {{2023}},
}