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Impact of Bi content on the accuracy of oxygen concentration measurements in liquid Pb–Bi alloys

Accurate measurements of the oxygen concentration in liquid lead-bismuth eutectic (LBE) alloys are essential for ensuring optimum cooling conditions in heavy liquid metal coolant fast reactors. However, while unavoidable variations in the Bi contents of these alloys can affect the accuracy of these...

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Autores principales: Zeng, Xian, Zhang, Xintong, Meng, Xie, Zhang, Wenliang, Zhang, Xiaoxin, Yan, Qingzhi
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Elsevier 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9830151/
https://www.ncbi.nlm.nih.gov/pubmed/36636208
http://dx.doi.org/10.1016/j.heliyon.2022.e12606
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author Zeng, Xian
Zhang, Xintong
Meng, Xie
Zhang, Wenliang
Zhang, Xiaoxin
Yan, Qingzhi
author_facet Zeng, Xian
Zhang, Xintong
Meng, Xie
Zhang, Wenliang
Zhang, Xiaoxin
Yan, Qingzhi
author_sort Zeng, Xian
collection PubMed
description Accurate measurements of the oxygen concentration in liquid lead-bismuth eutectic (LBE) alloys are essential for ensuring optimum cooling conditions in heavy liquid metal coolant fast reactors. However, while unavoidable variations in the Bi contents of these alloys can affect the accuracy of these measurements, this issue has not yet been rigorously evaluated. The present work addresses this issue by evaluating variations in oxygen concentration measurements obtained experimentally for oxygen-saturated liquid LBE alloys with different Bi contents at different temperatures using a solid electrolyte oxygen sensor. Theoretical relationships are established between sensor voltage, oxygen concentration, temperature, and Bi content under the applied experimental conditions, and excellent agreement is obtained between the experimental and theoretical results. The theoretical relationships establish that the voltage decreases by about 1 mV for every 1 wt% increase in Bi content at a temperature of 400 °C. At a fixed voltage, with the increase of T, the influence of the Bi content on the C(O) calculation results gradually increased. Finally, the impact of varying Bi contents on the accuracy of oxygen concentration measurements is evaluated under practical reactor operation conditions, and higher requirements for the control of dissolved oxygen in LBE-cooled fast reactors are proposed.
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spelling pubmed-98301512023-01-11 Impact of Bi content on the accuracy of oxygen concentration measurements in liquid Pb–Bi alloys Zeng, Xian Zhang, Xintong Meng, Xie Zhang, Wenliang Zhang, Xiaoxin Yan, Qingzhi Heliyon Research Article Accurate measurements of the oxygen concentration in liquid lead-bismuth eutectic (LBE) alloys are essential for ensuring optimum cooling conditions in heavy liquid metal coolant fast reactors. However, while unavoidable variations in the Bi contents of these alloys can affect the accuracy of these measurements, this issue has not yet been rigorously evaluated. The present work addresses this issue by evaluating variations in oxygen concentration measurements obtained experimentally for oxygen-saturated liquid LBE alloys with different Bi contents at different temperatures using a solid electrolyte oxygen sensor. Theoretical relationships are established between sensor voltage, oxygen concentration, temperature, and Bi content under the applied experimental conditions, and excellent agreement is obtained between the experimental and theoretical results. The theoretical relationships establish that the voltage decreases by about 1 mV for every 1 wt% increase in Bi content at a temperature of 400 °C. At a fixed voltage, with the increase of T, the influence of the Bi content on the C(O) calculation results gradually increased. Finally, the impact of varying Bi contents on the accuracy of oxygen concentration measurements is evaluated under practical reactor operation conditions, and higher requirements for the control of dissolved oxygen in LBE-cooled fast reactors are proposed. Elsevier 2022-12-23 /pmc/articles/PMC9830151/ /pubmed/36636208 http://dx.doi.org/10.1016/j.heliyon.2022.e12606 Text en © 2022 The Author(s) https://creativecommons.org/licenses/by-nc-nd/4.0/This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
spellingShingle Research Article
Zeng, Xian
Zhang, Xintong
Meng, Xie
Zhang, Wenliang
Zhang, Xiaoxin
Yan, Qingzhi
Impact of Bi content on the accuracy of oxygen concentration measurements in liquid Pb–Bi alloys
title Impact of Bi content on the accuracy of oxygen concentration measurements in liquid Pb–Bi alloys
title_full Impact of Bi content on the accuracy of oxygen concentration measurements in liquid Pb–Bi alloys
title_fullStr Impact of Bi content on the accuracy of oxygen concentration measurements in liquid Pb–Bi alloys
title_full_unstemmed Impact of Bi content on the accuracy of oxygen concentration measurements in liquid Pb–Bi alloys
title_short Impact of Bi content on the accuracy of oxygen concentration measurements in liquid Pb–Bi alloys
title_sort impact of bi content on the accuracy of oxygen concentration measurements in liquid pb–bi alloys
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9830151/
https://www.ncbi.nlm.nih.gov/pubmed/36636208
http://dx.doi.org/10.1016/j.heliyon.2022.e12606
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