Nuclear Engineering and Technology最新文献_第3页

Preconditioned JFNK discontinuous Galerkin method for the SN neutron transport equation based on the WINGS framework 基于WINGS框架的SN中子输运方程的预条件JFNK不连续Galerkin方法

IF 2.6 3区工程技术 Q1 NUCLEAR SCIENCE & TECHNOLOGY

Nuclear Engineering and Technology

Pub Date : 2026-01-19 DOI: 10.1016/j.net.2026.104145

Xiantao Cui , Rong Zhou , Wei Zeng , Binbin Zhang , Shenglong Qiang , Di Xiang

This paper presents a solution scheme for the SN neutron transport equation using the discontinuous Galerkin method, implemented within the WINGS framework. The resulting SN-DG-WINGS program is capable of solving both steady-state eigenvalue problems and fixed-source problems, and incorporates the JFNK algorithm via the solver interface provided by WINGS. To improve computational efficiency, a preconditioned matrix construction method based on the A-matrix is introduced, along with a computational strategy for generating initial guesses. The accuracy of the program is verified through a series of benchmark cases, including one dimensional fixed source problems with anisotropic scattering and three dimensional criticality problems. Numerical results indicate an eigenvalue deviation within 200 pcm and a flux distribution error below 5 %. In terms of computational performance, the proposed preconditioning technique and initial guess strategy significantly improve convergence speed and stability. Large-scale parallel tests show that the program maintains a parallel efficiency of 47.3 % even at 1024 processors, demonstrating strong scalability.

本文提出了一种在WINGS框架下使用不连续伽辽金方法求解SN中子输运方程的方案。所得到的SN-DG-WINGS程序能够同时解决稳态特征值问题和固定源问题，并通过WINGS提供的求解器接口集成了JFNK算法。为了提高计算效率，提出了一种基于a矩阵的预条件矩阵构造方法，并提出了一种生成初始猜测的计算策略。通过一维各向异性散射固定源问题和三维临界问题等基准算例验证了程序的准确性。数值结果表明，本征值偏差在200pcm以内，磁通分布误差在5%以下。在计算性能方面，提出的预处理技术和初始猜测策略显著提高了收敛速度和稳定性。大规模并行测试表明，即使在1024个处理器的情况下，该程序仍保持47.3%的并行效率，显示出强大的可扩展性。

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引用次数: 0

Generation of Fourier amplitude spectra and power spectral density functions compatible with orientation-independent design spectra for bidirectional seismic analyses of nuclear facilities 核设施双向地震分析中与定向无关设计谱兼容的傅立叶振幅谱和功率谱密度函数的生成

IF 2.6 3区工程技术 Q1 NUCLEAR SCIENCE & TECHNOLOGY

Nuclear Engineering and Technology

Pub Date : 2026-01-17 DOI: 10.1016/j.net.2026.104136

Luis A. Montejo

While matching input motions to a design response spectrum (DRS) is standard practice, the US-NRC Standard Review Plan (SRP) 3.7.1 also mandates a minimum power spectral density (PSD) check to prevent power deficiencies that can lead to unconservative in-structure response spectra (ISRS). However, existing methodologies for constructing the required target PSD functions are designed for single-component analysis and do not accommodate the modern orientation-independent spectra (e.g., RotDnn) toward which bidirectional analysis is moving. This article addresses this gap by introducing an iterative algorithm to generate duration-dependent, orientation-independent PSD and Fourier Amplitude Spectra (FAS) functions compatible with any target RotDnn spectrum. The algorithm iteratively adjusts the target FAS of two orthogonal components until their combined RotDnn response spectrum provides a close match to the target DRS, from which a large set of synthetic motions is generated to define the final orientation-independent target spectra. The accuracy and robustness of the proposed methodology is demonstrated by successfully reproducing the FASRotD100 and PSDRotD100 from a benchmark dataset of 50 historical earthquake records, providing an essential tool for reliable seismic assessments consistent with modern hazard definitions.

虽然将输入运动与设计响应谱（DRS）匹配是标准做法，但US-NRC标准评审计划（SRP） 3.7.1还要求进行最小功率谱密度（PSD）检查，以防止可能导致非保守结构内响应谱（ISRS）的功率不足。然而，用于构建所需目标PSD函数的现有方法是为单组分分析设计的，并且不适应双向分析正在发展的现代方向无关光谱（例如RotDnn）。本文通过引入一种迭代算法来生成与任何目标RotDnn谱兼容的与持续时间相关、与方向无关的PSD和傅立叶振幅谱（FAS）函数，从而解决了这一差距。该算法迭代调整两个正交分量的目标FAS，直到它们的联合RotDnn响应谱与目标DRS非常匹配，并由此产生大量的合成运动来定义最终的与方向无关的目标光谱。通过成功地从50个历史地震记录的基准数据集中再现FASRotD100和PSDRotD100，证明了所提出方法的准确性和稳健性，为与现代灾害定义一致的可靠地震评估提供了重要工具。

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引用次数: 0

Seismic behavior of electrical cabinets with cast-in-place anchors: influence of concrete cracks and multi-bay installation 现浇锚杆电柜抗震性能：混凝土裂缝和多槽安装的影响

IF 2.6 3区工程技术 Q1 NUCLEAR SCIENCE & TECHNOLOGY

Nuclear Engineering and Technology

Pub Date : 2026-01-16 DOI: 10.1016/j.net.2026.104144

Bub-Gyu Jeon , Sung-Wan Kim , Dong-Uk Park , Chae-Been Lee , DaeGi Hahm , Hong-Pyo Lee

Electrical cabinets are typically assembled in a multi-bay configuration, connecting two or more modules, and the structural implications of this setup must be carefully addressed. Concrete foundation cracks, often observed during field investigations at power plants, represent a common form of support deterioration. This study fabricated concrete foundations to simulate intact conditions and cracked conditions with 0.5 mm and 1.0 mm wide cracks at anchor locations. A simplified electrical cabinet model was constructed in single-bay, two-bay, and three-bay configurations and anchored to the concrete foundations using cast-in-place anchors to consider the effects of multi-bay configuration and support deterioration. Three-axis shaking table tests were conducted, including resonant frequency search and seismic fragility tests. The results indicated that cracks at the anchor locations can increase the uncertainty in the cabinet's resonant frequency. Specifically, when the concrete foundation was intact, seismic performance improved as the number of connected bays increased. However, cracks up to 1.0 mm in width degraded the seismic performance of multi-bay configurations but had a negligible impact on the single-bay cabinet. Moreover, distinct damage modes were observed between single-bay and multi-bay conditions.

电柜通常以多机柜配置组装，连接两个或更多模块，必须仔细处理这种设置的结构含义。在电厂现场调查中经常观察到混凝土基础裂缝，这是一种常见的支护劣化形式。本研究制作混凝土基础，模拟锚固位置0.5 mm和1.0 mm宽裂缝的完整条件和开裂条件。建立了简化的电柜模型，分为单仓、双仓和三仓三种构型，考虑多仓构型和支座劣化的影响，采用现浇锚杆将电柜锚固在混凝土基础上。进行了三轴振动台试验，包括共振频率搜索和地震易损性试验。结果表明，锚固位置的裂缝会增加箱体谐振频率的不确定性。具体而言，在混凝土基础完整的情况下，随着连接槽数量的增加，抗震性能有所提高。然而，宽度为1.0 mm的裂缝会降低多机柜的抗震性能，但对单机柜的影响可以忽略不计。此外，在单舱和多舱条件下观察到不同的损伤模式。

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引用次数: 0

The beamline optical component structural parameter optimization design based on PyAnsys and deep learning integration 基于PyAnsys和深度学习集成的光束线光学元件结构参数优化设计

IF 2.6 3区工程技术 Q1 NUCLEAR SCIENCE & TECHNOLOGY

Nuclear Engineering and Technology

Pub Date : 2026-01-15 DOI: 10.1016/j.net.2026.104142

Tong Li , Hao Zhou , Zhifeng Huang , Zhongmin Xu , Weiqing Zhang

With the rapid development of high-repetition rate X-ray free electron laser (FEL), the issues of thermal deformation and stress in optical elements, such as mirrors, under high thermal loads have become increasingly prominent. Traditional design optimization relies on repeated Thermal-Structural coupling finite element simulations, which face bottlenecks, including low optimization efficiency and insufficient utilization of historical data. This paper proposes an optimization approach that combines PyAnsys parametric scanning with deep learning-based surface shape prediction, aiming to enhance the optimization efficiency of mirror cooling structures and support parameters. A parametric simulation platform is constructed using PyAnsys Geometry and PyMechanical, enabling the rapid generation of model variants within 30 s. Additionally, a historical database containing geometric features, physical parameters, and operating conditions is established. Furthermore, a deep neural network-based mirror height error prediction model is developed, and experiments show that the model can predict surface height errors with RMS <0.08 nm in water-cooled silicon mirror cases. This method has the potential to shorten the traditional design iteration cycle to a few hours, significantly enhancing data reuse. Future work should focus on incorporating incremental learning and physical constraints to improve the reliability of extrapolation for multi-condition scenarios and refine the optimization loop.

随着高重复率x射线自由电子激光器（FEL）的快速发展，光学元件（如反射镜）在高热载荷下的热变形和热应力问题日益突出。传统的设计优化依赖于重复的热-结构耦合有限元模拟，存在优化效率低、历史数据利用率不足等瓶颈。本文提出了一种将PyAnsys参数扫描与基于深度学习的曲面形状预测相结合的优化方法，旨在提高镜面冷却结构和支撑参数的优化效率。利用PyAnsys Geometry和PyMechanical构建了参数化仿真平台，可在30s内快速生成模型变体。此外，还建立了包含几何特征、物理参数和操作条件的历史数据库。在此基础上，建立了基于深度神经网络的镜面高度误差预测模型，实验结果表明，该模型对水冷硅镜面的镜面高度误差预测的RMS为0.08 nm。这种方法有可能将传统的设计迭代周期缩短到几个小时，显著提高数据重用。未来的工作应侧重于将增量学习和物理约束结合起来，以提高多条件情景外推的可靠性，并完善优化循环。

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引用次数: 0

Cyclic test and parametric analysis of steel shear wall made of two inclined slotted infill plates 两斜缝填充板钢剪力墙循环试验及参数分析

IF 2.6 3区工程技术 Q1 NUCLEAR SCIENCE & TECHNOLOGY

Nuclear Engineering and Technology

Pub Date : 2026-01-15 DOI: 10.1016/j.net.2026.104137

Mohammad Akram Faizy , Seyed Bahram Beheshti-Aval

This study investigates the seismic performance of a steel shear wall (SSW) made of two inclined slotted infill plates. Despite widespread use of SSWs, conventional steel shear walls (C-SSWs) face challenges such as limited energy dissipation and vulnerability to brittle failure under seismic loading. To overcome these issues, this research investigates the cyclic behavior of the slotted steel shear wall (S-SSW) compared to the conventional one. Understanding the impact of the configuration of infill plates is essential for improving seismic behavior and safety. The necessity of this research arises from the demand for enhanced ductility and energy absorption in seismic design. The methodological approach combines experimental testing of two 1/3-scale shear wall specimens to capture their hysteretic behavior. Alongside a parametric study utilizing Abaqus software is also used to evaluate the width-to-thickness ratios of the inclined strips over the behavior of the system. The findings reveal that while S-SSW exhibits reduced initial stiffness and strength, it demonstrates a substantially higher capacity for energy dissipation, contributing to improved seismic performance. Furthermore, the results of parametric studies reveal a clear dependence of both stiffness and strength on the width-to-thickness ratio of inclined strips.

本文研究了由两块斜缝填充板构成的钢剪力墙的抗震性能。尽管ssw被广泛使用，但传统的钢剪力墙（c - ssw）面临着诸如有限的能量耗散和地震荷载下脆性破坏等挑战。为了克服这些问题，本研究对开槽钢剪力墙（S-SSW）与常规剪力墙的循环性能进行了比较。了解填充板结构的影响对改善抗震性能和安全性至关重要。本研究的必要性来自于抗震设计中对增强延性和能量吸收的要求。该方法结合了两个1/3尺度剪力墙试件的实验测试，以捕捉其滞回行为。此外，还利用Abaqus软件进行参数化研究，以评估倾斜条带的宽度与厚度比对系统行为的影响。研究结果表明，虽然S-SSW的初始刚度和强度降低，但其能量耗散能力大大提高，有助于提高抗震性能。此外，参数化研究的结果表明，刚度和强度明显依赖于斜带的宽厚比。

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引用次数: 0

Experimental study on pressurized water reactor imaging using cosmic ray muons 宇宙射线介子在压水堆成像中的实验研究

IF 2.6 3区工程技术 Q1 NUCLEAR SCIENCE & TECHNOLOGY

Nuclear Engineering and Technology

Pub Date : 2026-01-13 DOI: 10.1016/j.net.2026.104133

Yupeng Li , Shengguo Wu , Xiaoke Wang , Jing Zheng , Yufei Wu , Xinnan Chen , Chunyu Gao , Chenyang Tang , Qiaoling Lu , Yang Liu , Xiuzhang Tang

This study presents cosmic-ray muon transmission imaging of a nuclear reactor. A high-spatial-resolution drift-tube muon tracker with an active area of 1.1 × 1.1 m² was deployed at Unit 1 of a commercial nuclear power plant in China, which is a "Hualong One" pressurized water reactor, and operated for six months to record muon flux from various directions. Prior to fuel loading, a two-dimensional absorption map of the reactor was reconstructed from coincident muon events, which clearly resolved the reactor core and surrounding structures. After fuel loading, measurable changes in the absorption signal were observed in the fuel region. Monte Carlo simulations yielded reactor and core-specific imaging results that were in good agreement with the experimental measurements. In addition, the impact of tracker spatial resolution on image quality was analyzed. These findings indicate that muon transmission imaging is a promising method for reactor imaging.

本研究提出核子反应炉的宇宙射线介子透射成像。在中国商用核电站“华龙一号”压水堆1号机组安装了高空间分辨率漂管型介子跟踪仪，有效面积为1.1 × 1.1 m2，运行了6个月，记录了不同方向的介子通量。在燃料加载前，利用同步μ子事件重建了反应堆的二维吸收图，清晰地分辨了反应堆堆芯和周围结构。加载燃料后，在燃料区观察到可测量的吸收信号变化。蒙特卡罗模拟产生的反应堆和堆芯特定成像结果与实验测量结果很好地一致。此外，分析了跟踪器空间分辨率对图像质量的影响。这些发现表明，μ子透射成像是一种很有前途的反应堆成像方法。

{"title":"Experimental study on pressurized water reactor imaging using cosmic ray muons","authors":"Yupeng Li , Shengguo Wu , Xiaoke Wang , Jing Zheng , Yufei Wu , Xinnan Chen , Chunyu Gao , Chenyang Tang , Qiaoling Lu , Yang Liu , Xiuzhang Tang","doi":"10.1016/j.net.2026.104133","DOIUrl":"10.1016/j.net.2026.104133","url":null,"abstract":"<div><div>This study presents cosmic-ray muon transmission imaging of a nuclear reactor. A high-spatial-resolution drift-tube muon tracker with an active area of 1.1 × 1.1 m<sup>2</sup> was deployed at Unit 1 of a commercial nuclear power plant in China, which is a \"Hualong One\" pressurized water reactor, and operated for six months to record muon flux from various directions. Prior to fuel loading, a two-dimensional absorption map of the reactor was reconstructed from coincident muon events, which clearly resolved the reactor core and surrounding structures. After fuel loading, measurable changes in the absorption signal were observed in the fuel region. Monte Carlo simulations yielded reactor and core-specific imaging results that were in good agreement with the experimental measurements. In addition, the impact of tracker spatial resolution on image quality was analyzed. These findings indicate that muon transmission imaging is a promising method for reactor imaging.</div></div>","PeriodicalId":19272,"journal":{"name":"Nuclear Engineering and Technology","volume":"58 5","pages":"Article 104133"},"PeriodicalIF":2.6,"publicationDate":"2026-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146035726","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Selective corrosion of δ-ferrite in austenitic stainless steel welds under wet–dry cycling: Influence of surface temperature for dry storage canister applications 干湿循环下奥氏体不锈钢焊缝δ-铁素体的选择性腐蚀：干燥储罐应用中表面温度的影响

IF 2.6 3区工程技术 Q1 NUCLEAR SCIENCE & TECHNOLOGY

Nuclear Engineering and Technology

Pub Date : 2026-01-13 DOI: 10.1016/j.net.2026.104141

Seunghyun Kim, Gidong Kim, Sang-Woo Song

This study investigates the effect of elevated surface temperature on chloride-induced stress corrosion cracking behavior in austenitic stainless steels welds exposed to MgCl₂-containing environments. U-bend specimens of 304L-ER308L and 316L-ER316L were subjected to controlled salt spray and heating conditions at 75 °C and 100 °C to simulate decay heat in dry storage systems. Despite the absence of visible surface moisture at elevated temperatures, extensive cracking was observed in 304L and ER308L, while ER316L exhibited no signs of crack initiation at 100 °C. SEM and EPMA analyses revealed selective crack propagation along δ-ferrite networks, with strong Cl and O enrichment detected inside the cracks, confirming the presence of aggressive localized chemistry. The susceptibility to CISCC was found to be closely related to the δ-ferrite composition: ER308L exhibited Ni-depleted, Cr-rich ferrite that facilitated anodic dissolution, whereas the δ-ferrite in ER316L was enriched in Ni and Mo, suppressing corrosion. The results demonstrate that microstructural and chemical factors, including alloying element distribution and salt hygroscopicity, play dominant roles in crack initiation and propagation under thermally accelerated conditions.

本研究探讨了表面温度升高对暴露于含mgcl2环境中的奥氏体不锈钢焊缝氯化物诱导应力腐蚀开裂行为的影响。304L-ER308L和316L-ER316L的u型试样分别在75°C和100°C的受控盐雾和加热条件下进行模拟干燥储存系统中的衰变热。尽管在高温下没有可见的表面水分，但在304L和ER308L中观察到广泛的裂纹，而ER316L在100°C时没有裂纹萌生的迹象。SEM和EPMA分析显示，裂纹沿δ-铁素体网络选择性扩展，裂纹内检测到强烈的Cl和O富集，证实了侵略性局部化学的存在。对CISCC的敏感性与δ-铁素体组成密切相关：ER308L中的δ-铁素体富含Ni和Mo，有利于阳极溶解，而ER316L中的δ-铁素体则富含Ni和Mo，抑制了腐蚀。结果表明，在热加速条件下，合金元素分布和盐的吸湿性等微观组织和化学因素对裂纹的萌生和扩展起主导作用。

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引用次数: 0

Determination of gadolinium by PGNAA with a D-T neutron generator and optimization algorithm 用D-T中子发生器和优化算法测定PGNAA中的钆

IF 2.6 3区工程技术 Q1 NUCLEAR SCIENCE & TECHNOLOGY

Nuclear Engineering and Technology

Pub Date : 2026-01-13 DOI: 10.1016/j.net.2026.104125

Can Cheng , Zhenhua Zhang , Jie Mei , Xiaorong Wang , Qing Shan , Pingkun Cai , Jiatong Li , Daqian Hei , Wenbao Jia

Soluble neutron poisons are introduced to maintain criticality safety for reprocessing spent nuclear fuel (SNF). Gd is a highly effective soluble neutron poison and has been widely applied in the process, thereby rendering online monitoring of Gd solution concentrations particularly important. In this study, a Gd solution measurement setup was developed using prompt gamma neutron activation analysis technology, comprising a D-T neutron generator and a BGO detector. Experimental results demonstrated that, due to the neutron self-shielding effect, the prompt gamma rays induced by Gd exhibited a nonlinear correlation with concentration, which was corrected using Monte Carlo simulations. The minimum detectable concentration (MDC) of Gd solution for the developed setup was 1.5 mg/L. Furthermore, an optimization algorithm–based method was proposed to determine the concentration of unknown samples without relying on neutron detectors to obtain the neutron self-shielding factor. Validation with two test samples confirmed the feasibility of this approach, showing a maximum deviation of 6.7 %. These results indicate that the developed setup and method are feasible for online monitoring of Gd solutions.

引入可溶性中子毒物来维持乏燃料后处理的临界安全。Gd是一种高效的可溶性中子毒，在生产过程中得到了广泛的应用，因此在线监测Gd溶液浓度就显得尤为重要。在本研究中，利用伽马中子激活分析技术开发了Gd溶液测量装置，该装置由一个D-T中子发生器和一个BGO探测器组成。实验结果表明，由于中子的自屏蔽效应，Gd诱导的提示伽马射线与浓度呈非线性相关，并通过蒙特卡罗模拟进行了修正。Gd溶液的最低检测浓度（MDC）为1.5 mg/L。在此基础上，提出了一种不依赖中子探测器获取中子自屏蔽系数的优化算法来确定未知样品浓度的方法。两个样品的验证证实了该方法的可行性，最大偏差为6.7%。这些结果表明，所建立的装置和方法对Gd溶液的在线监测是可行的。

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引用次数: 0

Impact of non-uniform dead layer distribution on efficiency calibration for volumetric sources in HPGe detectors 非均匀死层分布对高能锗探测器体积源效率标定的影响

IF 2.6 3区工程技术 Q1 NUCLEAR SCIENCE & TECHNOLOGY

Nuclear Engineering and Technology

Pub Date : 2026-01-13 DOI: 10.1016/j.net.2026.104143

Thi Yen Hong Huynh , Huu Ngan Thy Truong , Ngoc Ba Vu

Accurate characterization of the HPGe detector dead layer is crucial for reliable Monte Carlo simulations in gamma-ray spectrometry. This study investigates the impact of source geometry on the determination of the effective dead layer thickness. Experimental measurements and MCNP6 simulations were conducted using a p-type coaxial HPGe detector with three geometries: a cylindrical source (S1), a 3π source (S2), and a Marinelli beaker (S3). Results show that while the physical dead layer distribution is intrinsic to the crystal, the determined effective dead layer parameter is strongly dependent on the irradiation geometry. The on-axis source (S1) indicated a stable frontal dead layer of approximately 0.60 mm. Conversely, volumetric sources (S2 and S3) revealed a thicker lateral dead layer (∼1.10–1.21 mm) with a significant transition zone at low energies due to the geometric weighting of photon interactions. Crucially, the study demonstrates that applying a uniform dead layer thickness derived from point-source calibration (S1) to volumetric geometries (S3) results in a systematic overestimation of efficiency across the energy range. These findings highlight the inadequacy of uniform dead layer models for complex geometries and the necessity of multi-region characterization for high-accuracy environmental monitoring.

高能锗探测器死层的准确表征对于伽马射线能谱法中可靠的蒙特卡罗模拟至关重要。本文研究了源的几何形状对确定有效死层厚度的影响。实验测量和MCNP6模拟使用了p型同轴HPGe探测器，该探测器具有三种几何形状：圆柱形源（S1）， 3π源（S2）和Marinelli烧杯（S3）。结果表明，虽然物理死层分布是晶体固有的，但确定的有效死层参数强烈依赖于辐照几何形状。轴上源（S1）显示一个稳定的约0.60 mm的正面死层。相反，体积源（S2和S3）显示出较厚的侧死层（~ 1.10-1.21 mm），由于光子相互作用的几何加权，在低能量下具有显著的过渡区。至关重要的是，该研究表明，将由点源校准（S1）得出的均匀死层厚度应用于体积几何（S3）会导致系统高估整个能量范围内的效率。这些发现突出了均匀死层模型对复杂几何形状的不足之处，以及多区域表征对高精度环境监测的必要性。

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引用次数: 0

Neutron and γ-ray shielding properties of magnetite-serpentine concrete based on Geant4 simulation 基于Geant4模拟的磁铁矿蛇纹混凝土中子和γ射线屏蔽性能

IF 2.6 3区工程技术 Q1 NUCLEAR SCIENCE & TECHNOLOGY

Nuclear Engineering and Technology

Pub Date : 2026-01-12 DOI: 10.1016/j.net.2026.104127

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

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.

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。

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引用次数: 0