Neutron and γ-ray shielding properties of magnetite-serpentine concrete based on Geant4 simulation

IF 2.9 3区工程技术 Q1 NUCLEAR SCIENCE & TECHNOLOGY

Nuclear Engineering and Technology Pub Date : 2026-05-01 Epub Date: 2026-01-12 DOI:10.1016/j.net.2026.104127

Jun Liu , Hongfei Chen , Weizhuo Zhang , Renjie Niu , Ertao Li , Yuyang Chen

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Abstract

Serpentine concrete is an excellent neutron shielding material, and the addition of magnetite aggregate can enhance the γ-ray shielding performance of concrete. In this study, the Geant4 software was used to simulate and analyze five different concrete mix designs where magnetite aggregate replaced serpentine aggregate at varying concentrations. To ensure the reliability of the simulation results, the study compared them with the calculated data obtained from the Phy-X/PSD program. For both neutrons and γ-rays, several shielding parameters including linear attenuation coefficient (μ), half-value layer (HVL) and effective atomic number (Z_eff) as well as effective electron density (N_eff) were systematically calculated. Penetration rate and neutron energy spectrum analyses were also conducted. The results show that with the increase of magnetite doping, the γ-ray shielding performance of concrete is significantly enhanced, but the neutron shielding ability decreases. Based on a comprehensive evaluation of various performance indicators, the optimal proportion of magnetite aggregate was determined to be 25 %. The neutron shielding performance of this admixture is similar to that of pure serpentine concrete, while its γ-ray shielding performance is significantly improved.

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基于Geant4模拟的磁铁矿蛇纹混凝土中子和γ射线屏蔽性能

蛇纹石混凝土是一种优良的中子屏蔽材料，添加磁铁矿骨料可提高混凝土的γ射线屏蔽性能。在这项研究中，使用Geant4软件模拟和分析了五种不同的混凝土配合比设计，其中磁铁矿骨料取代了不同浓度的蛇纹石骨料。为了保证仿真结果的可靠性，将仿真结果与Phy-X/PSD程序的计算数据进行了比较。对中子和γ射线进行了线性衰减系数μ、半值层HVL、有效原子序数Zeff和有效电子密度Neff等屏蔽参数的系统计算。并进行了穿透速率和中子能谱分析。结果表明：随着磁铁矿掺量的增加，混凝土的γ射线屏蔽性能显著增强，但中子屏蔽能力下降；在综合评价各项性能指标的基础上，确定磁铁矿骨料的最佳配比为25%。该掺合料对中子的屏蔽性能与纯蛇纹石混凝土相当，对γ射线的屏蔽性能有明显提高。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Nuclear Engineering and Technology 工程技术-核科学技术

CiteScore

4.80

自引率

7.40%

发文量

431

审稿时长

3.5 months

期刊介绍： Nuclear Engineering and Technology (NET), an international journal of the Korean Nuclear Society (KNS), publishes peer-reviewed papers on original research, ideas and developments in all areas of the field of nuclear science and technology. NET bimonthly publishes original articles, reviews, and technical notes. The journal is listed in the Science Citation Index Expanded (SCIE) of Thomson Reuters. NET covers all fields for peaceful utilization of nuclear energy and radiation as follows: 1) Reactor Physics 2) Thermal Hydraulics 3) Nuclear Safety 4) Nuclear I&C 5) Nuclear Physics, Fusion, and Laser Technology 6) Nuclear Fuel Cycle and Radioactive Waste Management 7) Nuclear Fuel and Reactor Materials 8) Radiation Application 9) Radiation Protection 10) Nuclear Structural Analysis and Plant Management & Maintenance 11) Nuclear Policy, Economics, and Human Resource Development