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Study on the Thermophysical Properties of 80% (10)B Enrichment of B(4)C

In this paper, a specific type of Boron Carbide (B(4)C) with a high enrichment of 80 ± 0.3 at% (10)B was prepared as an absorbing material for control rods in nuclear reactors. The enrichment of (10)B was achieved using a chemical exchange method, followed by obtaining boron carbide powder through a...

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Autores principales: Lv, Zhipeng, Hu, Haixiang, Cao, Jin, Lin, Shaofang, Li, Changzheng, Nie, Lihong, Zhou, Xuanpu, Ren, Qisen, Lv, Qingyang, Hu, Jing
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10673213/
https://www.ncbi.nlm.nih.gov/pubmed/38005141
http://dx.doi.org/10.3390/ma16227212
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author Lv, Zhipeng
Hu, Haixiang
Cao, Jin
Lin, Shaofang
Li, Changzheng
Nie, Lihong
Zhou, Xuanpu
Ren, Qisen
Lv, Qingyang
Hu, Jing
author_facet Lv, Zhipeng
Hu, Haixiang
Cao, Jin
Lin, Shaofang
Li, Changzheng
Nie, Lihong
Zhou, Xuanpu
Ren, Qisen
Lv, Qingyang
Hu, Jing
author_sort Lv, Zhipeng
collection PubMed
description In this paper, a specific type of Boron Carbide (B(4)C) with a high enrichment of 80 ± 0.3 at% (10)B was prepared as an absorbing material for control rods in nuclear reactors. The enrichment of (10)B was achieved using a chemical exchange method, followed by obtaining boron carbide powder through a carbothermal reduction method. Finally, B(4)C with a high enrichment of 68.3~74.2% theoretical density was obtained using a hot-pressed sintering process. This study focused on investigating the basic out-of-pile thermophysical properties of the high enrichment B(4)C compared to natural B(4)C reference pellets under non-irradiated conditions. These properties included the thermal expansion coefficient, thermal conductivity, emissivity, elastic limit, elastic modulus, and Poisson’s ratio. The research results indicate that the enriched B(4)C pellet exhibits good thermal stability and meets the technical requirements for mechanical capability. It was observed that porosity plays a significant role in determining the out-of-pile mechanical capability of B(4)C, with higher porosity samples having a lower thermal conductivity, elastic–plastic limit, and elastic modulus. In short, all the technical indexes studied meet the requirements of nuclear-grade Boron Carbide pellets for Pressurized Water Reactors.
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spelling pubmed-106732132023-11-17 Study on the Thermophysical Properties of 80% (10)B Enrichment of B(4)C Lv, Zhipeng Hu, Haixiang Cao, Jin Lin, Shaofang Li, Changzheng Nie, Lihong Zhou, Xuanpu Ren, Qisen Lv, Qingyang Hu, Jing Materials (Basel) Article In this paper, a specific type of Boron Carbide (B(4)C) with a high enrichment of 80 ± 0.3 at% (10)B was prepared as an absorbing material for control rods in nuclear reactors. The enrichment of (10)B was achieved using a chemical exchange method, followed by obtaining boron carbide powder through a carbothermal reduction method. Finally, B(4)C with a high enrichment of 68.3~74.2% theoretical density was obtained using a hot-pressed sintering process. This study focused on investigating the basic out-of-pile thermophysical properties of the high enrichment B(4)C compared to natural B(4)C reference pellets under non-irradiated conditions. These properties included the thermal expansion coefficient, thermal conductivity, emissivity, elastic limit, elastic modulus, and Poisson’s ratio. The research results indicate that the enriched B(4)C pellet exhibits good thermal stability and meets the technical requirements for mechanical capability. It was observed that porosity plays a significant role in determining the out-of-pile mechanical capability of B(4)C, with higher porosity samples having a lower thermal conductivity, elastic–plastic limit, and elastic modulus. In short, all the technical indexes studied meet the requirements of nuclear-grade Boron Carbide pellets for Pressurized Water Reactors. MDPI 2023-11-17 /pmc/articles/PMC10673213/ /pubmed/38005141 http://dx.doi.org/10.3390/ma16227212 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Lv, Zhipeng
Hu, Haixiang
Cao, Jin
Lin, Shaofang
Li, Changzheng
Nie, Lihong
Zhou, Xuanpu
Ren, Qisen
Lv, Qingyang
Hu, Jing
Study on the Thermophysical Properties of 80% (10)B Enrichment of B(4)C
title Study on the Thermophysical Properties of 80% (10)B Enrichment of B(4)C
title_full Study on the Thermophysical Properties of 80% (10)B Enrichment of B(4)C
title_fullStr Study on the Thermophysical Properties of 80% (10)B Enrichment of B(4)C
title_full_unstemmed Study on the Thermophysical Properties of 80% (10)B Enrichment of B(4)C
title_short Study on the Thermophysical Properties of 80% (10)B Enrichment of B(4)C
title_sort study on the thermophysical properties of 80% (10)b enrichment of b(4)c
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10673213/
https://www.ncbi.nlm.nih.gov/pubmed/38005141
http://dx.doi.org/10.3390/ma16227212
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