Gas permeability and gamma ray shielding properties of concrete for nuclear applications

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2024-10-09 DOI:10.1016/j.nucengdes.2024.113616

Daria Jóźwiak-Niedźwiedzka , Marta Choinska Colombel , Aneta Brachaczek , Mariusz Dąbrowski , Jakub Ośko , Michał Kuć

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引用次数: 0

Abstract

Concrete used in nuclear applications faces significant durability challenges due to degradation from radiation, thermal stresses, and chemical reactions. These issues highlight the critical need for impermeable concrete shields to prevent radioactive leaks and protect against harmful radiation. This study examines how concrete composition affects gas permeability and gamma radiation shielding properties. Three coarse aggregates—amphibolite (reference), magnetite, and serpentine—and two cement types (ordinary and slag) were tested, with concrete densities ranging from 2309 to 3538 kg/m³. Gas permeability was measured using a Cembureau-type constant head permeameter, and gamma shielding was assessed through the linear attenuation coefficient (µ) and half-value layer (HVL) at ¹³⁷Cs decay energies. The results revealed significant variations in gas permeability and gamma ray shielding based on aggregate and cement type, with observable relationships between gas permeability, HVL, and concrete density. The results obtained from the presented research will contribute to increasing the safety, durability and cost-effectiveness of concrete constructions and maintenance of nuclear facilities.

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核用混凝土的气体渗透性和伽马射线屏蔽性能

由于辐射、热应力和化学反应造成的降解，核应用中使用的混凝土面临着重大的耐久性挑战。这些问题凸显了对防渗混凝土屏蔽的迫切需求，以防止放射性泄漏并抵御有害辐射。本研究探讨了混凝土成分如何影响气体渗透性和伽马辐射屏蔽性能。测试了三种粗骨料--闪长岩（参考）、磁铁矿和蛇纹石，以及两种水泥类型（普通水泥和矿渣水泥），混凝土密度范围为 2309 至 3538 kg/m3。使用 Cembureau 型恒定水头渗透仪测量了气体渗透性，并通过 137Cs 衰变能量下的线性衰减系数 (µ) 和半值层 (HVL) 评估了伽马屏蔽。研究结果表明，骨料和水泥类型不同，气体渗透率和伽马射线屏蔽率也有很大差异，气体渗透率、HVL 和混凝土密度之间的关系也很明显。本研究取得的成果将有助于提高核设施混凝土建造和维护的安全性、耐久性和成本效益。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.