Nuclear Engineering and Technology最新文献_第3页

Overcoming adhesion limits in tungsten coatings by magnetron sputter ion plating 磁控溅射离子镀克服钨镀层附着力限制

IF 2.6 3区工程技术

Nuclear Engineering and Technology Pub Date : 2025-09-13 DOI: 10.1016/j.net.2025.103919

Emiliano J. Di Liscia , Fabián J. Álvarez

{"title":"Overcoming adhesion limits in tungsten coatings by magnetron sputter ion plating","authors":"Emiliano J. Di Liscia , Fabián J. Álvarez","doi":"10.1016/j.net.2025.103919","DOIUrl":"10.1016/j.net.2025.103919","url":null,"abstract":"<div><div>Tungsten thin films are integral to many advanced applications due to their exceptional physical and chemical properties. However, conventional direct current magnetron sputtering (DCMS) techniques face significant limitations in achieving thick, adherent W coatings on different materials such as silicon, primarily due to residual stress leading to delamination at critical thicknesses. To overcome these challenges, this work employs magnetron sputter ion plating for the deposition of tungsten films on low activation steel (F82H) and monocrystalline silicon substrates. The deposition was carried out under varying substrate biases ranging from 0 to −1500 V. Characterization techniques such as grazing incident X-ray diffraction, scanning electron microscopy, energy-dispersive X-ray spectroscopy, optical profilometry, hardness measurements and scratch adhesion tests were used to evaluate the properties of the films. The results indicate that increasing the substrate bias enables the deposition of significantly thicker films, achieving up to 2000 nm at −1500 V on silicon compared to approximately 300 nm at 0 V. Additionally, higher biases reduce the residual compressive stress from 4.25 GPa to 1.5 GPa, contributing to improved adhesion. This work shows that the magnetron sputter ion plating deposition approach effectively overcomes the thickness and adhesion limitations associated with conventional DCMS-grown tungsten films.</div></div>","PeriodicalId":19272,"journal":{"name":"Nuclear Engineering and Technology","volume":"58 1","pages":"Article 103919"},"PeriodicalIF":2.6,"publicationDate":"2025-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145106418","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

High temperature reactor design evaluation program for metallic pressure boundary with multiple transient peak-valley determination and graphite components 基于多瞬态峰谷测定和石墨组分的金属压力边界高温反应器设计评价程序

IF 2.6 3区工程技术

Nuclear Engineering and Technology Pub Date : 2025-09-12 DOI: 10.1016/j.net.2025.103910

Tae-Hyeon Seok , Ji-Hye Kim , Gi-Bum Lee , Nam-Su Huh , Yun-Jae Kim , Jong-In Kim , Min-Ki Cho , Jong-Ha Kim

{"title":"High temperature reactor design evaluation program for metallic pressure boundary with multiple transient peak-valley determination and graphite components","authors":"Tae-Hyeon Seok , Ji-Hye Kim , Gi-Bum Lee , Nam-Su Huh , Yun-Jae Kim , Jong-In Kim , Min-Ki Cho , Jong-Ha Kim","doi":"10.1016/j.net.2025.103910","DOIUrl":"10.1016/j.net.2025.103910","url":null,"abstract":"<div><div>The design evaluation procedures of Class A metallic pressure boundary and graphite components under high temperature conditions, such as in Generation IV reactors, are highly complex. In particular, creep-fatigue damage evaluation requires the identification of peak and valley points for multiple transient cycles. In this paper, design evaluation procedures for Class A metallic pressure boundary and graphite components are implemented in a design evaluation program, named HTRspro (High Temperature Reactor structural evaluation computer program) for reliable and efficient evaluation. The design evaluation program includes not only creep-fatigue damage evaluation but also procedures for load-controlled stress limits, strain and deformation limits, and for graphite core component evaluation. Methods for determining peak and valley points to evaluate creep and fatigue damage under multiple transient cycles are proposed and applied to the program. Material properties presented in the ASME B&PV Code are embedded in the program, and detailed parameters can be input by users. The program is verified by comparison with Excel-based hand calculation results for an example of Volume Control Tank (VCT). In addition, creep-fatigue damage evaluation, including a cycle combination procedure for multiple transient cycles, is performed, and the evaluation results based on the proposed peak-valley determination methods are analyzed.</div></div>","PeriodicalId":19272,"journal":{"name":"Nuclear Engineering and Technology","volume":"58 1","pages":"Article 103910"},"PeriodicalIF":2.6,"publicationDate":"2025-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145105998","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

Conceptual design of a 3D-Printable DC electromagnetic pump for additive manufacturing 用于增材制造的3d打印直流电磁泵概念设计

IF 2.6 3区工程技术

Nuclear Engineering and Technology Pub Date : 2025-09-11 DOI: 10.1016/j.net.2025.103916

Geunhyeong Lee

{"title":"Conceptual design of a 3D-Printable DC electromagnetic pump for additive manufacturing","authors":"Geunhyeong Lee","doi":"10.1016/j.net.2025.103916","DOIUrl":"10.1016/j.net.2025.103916","url":null,"abstract":"<div><div>Electromagnetic pumps offer advantages in handling high-temperature or corrosive fluids by generating flow through Lorentz forces rather than mechanical impellers. However, direct current electromagnetic pumps typically require large currents, resulting in increased manufacturing costs due to thicker copper wires. This study proposes a novel direct current electromagnetic pump for metal additive manufacturing, potentially suitable for advanced Small Modular Reactors cooled by liquid sodium and liquid-metal charge stripper systems used in accelerators. Permanent magnets arranged in opposing directions generate concentrated magnetic flux around constrained flow paths, thereby producing multiple Lorentz forces and reducing the required input current. Numerical simulations demonstrate that the proposed design achieves a developed pressure of 10.5 bar at a significantly reduced current of 330 A, corresponding to a 52 % reduction in current compared to conventional helical-type pumps operating under similar conditions. Additionally, the new pump geometry simplifies fabrication by eliminating brazed joints and enabling a more compact design. These results indicate that 3D-printable electromagnetic pumps provide improvements in performance and ease of fabrication for high-pressure applications.</div></div>","PeriodicalId":19272,"journal":{"name":"Nuclear Engineering and Technology","volume":"58 1","pages":"Article 103916"},"PeriodicalIF":2.6,"publicationDate":"2025-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145106417","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

Bi-LSTM neural network for enhanced radiotherapy: Detection of tissue parameters 用于增强放疗的Bi-LSTM神经网络：组织参数的检测

IF 2.6 3区工程技术

Nuclear Engineering and Technology Pub Date : 2025-09-11 DOI: 10.1016/j.net.2025.103906

Javad Tayebi , Ali Rezaie , Mohammadreza Rezaie , Mehdi Hassanpour , Mohammad Rashed Iqbal Faruque

{"title":"Bi-LSTM neural network for enhanced radiotherapy: Detection of tissue parameters","authors":"Javad Tayebi , Ali Rezaie , Mohammadreza Rezaie , Mehdi Hassanpour , Mohammad Rashed Iqbal Faruque","doi":"10.1016/j.net.2025.103906","DOIUrl":"10.1016/j.net.2025.103906","url":null,"abstract":"<div><div>This study aims to simulate brain tissue and its elements using the MCNPX nuclear code and analyze X-ray emissions for tumor detection. This non-invasive approach offers a promising method for the accurate diagnosis of brain tumors, enabling timely treatment. Brain tissue, including tumor regions, was simulated at 70 keV, a common radiology energy. X-ray emissions were evaluated for variations in tissue density, elemental composition, thickness, and depth. The emitted X-ray doses were divided into 100 segments for detailed analysis. These data were then processed using an optimized Bi-LSTM neural network. This approach enabled precise segmentation and analysis of the X-ray data, improving tumor detection accuracy. Results showed significant differences in X-ray emission patterns between normal and tumor tissues. Tumor tissues exhibited distinct signatures, which were effectively captured and analyzed by the Bi-LSTM model. The model distinguished tissue types based on density, composition, thickness, and depth (1–5 cm). This study demonstrates that combining X-ray emission analysis with a Bi-LSTM neural network provides an effective method for brain tumor detection. The proposed approach may enhance non-invasive diagnostic capabilities and improve patient outcomes through early detection.</div></div>","PeriodicalId":19272,"journal":{"name":"Nuclear Engineering and Technology","volume":"58 1","pages":"Article 103906"},"PeriodicalIF":2.6,"publicationDate":"2025-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145045918","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

Modifier effect of BaTiO3 nanoparticles on morphology, structural, and radiation shielding characteristics of Li2O–BaTiO3–B2O3: TiO2 glasses 纳米BaTiO3改性剂对li20 - BaTiO3 - b2o3: TiO2玻璃形貌、结构及辐射屏蔽特性的影响

IF 2.6 3区工程技术

Nuclear Engineering and Technology Pub Date : 2025-09-11 DOI: 10.1016/j.net.2025.103905

Linganaboina Srinivasa Rao

{"title":"Modifier effect of BaTiO3 nanoparticles on morphology, structural, and radiation shielding characteristics of Li2O–BaTiO3–B2O3: TiO2 glasses","authors":"Linganaboina Srinivasa Rao","doi":"10.1016/j.net.2025.103905","DOIUrl":"10.1016/j.net.2025.103905","url":null,"abstract":"<div><div>A particular glass composition of (40-x)Li<sub>2</sub>O–xBaTiO<sub>3</sub>–59B<sub>2</sub>O<sub>3</sub>: 1TiO<sub>2</sub> (where x = 0, 5, 10, 15, 20) in mol % was chosen. The XRD and SEM studies confirmed amorphous nature of the glasses. The EDS revealed peaks at 0.2 keV, 0.5 keV, 4.5 keV, and 4.9 keV corresponding to B, O, Ba, Ti elements respectively. FTIR spectra revealed glass structure by means of [BO<sub>3</sub>], [BO<sub>4</sub>], [TiO<sub>4</sub>], and [TiO<sub>6</sub>] units. Prominent bump in the MAC value for all BT<sub>x</sub> samples (except BT<sub>0</sub>) was detected at photon energy ≈37.4 keV due to presence of Ba (Z = 56). The glass BT<sub>20</sub> exhibited the highest MAC (9.00 cm<sup>2</sup>/g), lowest HVL (0.0244 cm), lowest TVL (0.0352 cm) and shortest MFP (0.0352 cm) at 0.01 MeV, indicating its superior shielding performance. Increasing BaTiO<sub>3</sub> content enhanced the glass density from 2.352 to 3.154 g/cm<sup>3</sup>, leading to a significant improvement in gamma ray attenuation. The sample BT<sub>0</sub> with the highest Li<sub>2</sub>O content (40 mol %) exhibited the best neutron attenuation (Σ<sub>R</sub>/ρ = 0.1149 cm<sup>−1</sup>), while BT<sub>20</sub> had the lowest (Σ<sub>R</sub>/ρ = 0.0786 cm<sup>−1</sup>). Therefore, Li<sub>2</sub>O-rich glasses are better for thermal (0.0254 eV) and fast (4 MeV) neutron shielding, while BaTiO<sub>3</sub>-rich glasses are better for gamma shielding for mixed radiation fields.</div></div>","PeriodicalId":19272,"journal":{"name":"Nuclear Engineering and Technology","volume":"58 1","pages":"Article 103905"},"PeriodicalIF":2.6,"publicationDate":"2025-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145045916","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

Comparison of three LDR prostate brachytherapy treatment plans 三种LDR前列腺近距离治疗方案的比较

IF 2.6 3区工程技术

Nuclear Engineering and Technology Pub Date : 2025-09-11 DOI: 10.1016/j.net.2025.103901

M. Orabi

{"title":"Comparison of three LDR prostate brachytherapy treatment plans","authors":"M. Orabi","doi":"10.1016/j.net.2025.103901","DOIUrl":"10.1016/j.net.2025.103901","url":null,"abstract":"<div><div>In a previous work, the prostate brachytherapy was studied using the radionuclide cesium-131. Here in this study, we aim to perform a comparison between the three famous treatment plans of doing prostate brachytherapy. The low-dose-rate (LDR) category is being considered with the three radionuclides iodine-125, cesium-131 and palladium-103. The internal radiation doses delivered during the brachytherapy process are estimated for a number of organs of the body. The estimations are made by using some MCNP5 (Monte Carlo N-Particle version 5) simulation codes that utilize the ORNL-MIRD (Oak Ridge National Laboratory - Medical Internal Radiation Dose) phantom of human-body. To assess how much the other healthy organs could be affected by the brachytherapy process, the rates of radiation doses are estimated not only for the target organ, namely the prostate, but for some other organs in the near area as well. The sources of radiation (seeds) are assumed point sources. Different numbers of seeds with different radioactivities are used to cover the entire clinical ranges. It is found that the calculated dose rates and periods of delivering the prescribed doses are within the expectations.</div></div>","PeriodicalId":19272,"journal":{"name":"Nuclear Engineering and Technology","volume":"58 1","pages":"Article 103901"},"PeriodicalIF":2.6,"publicationDate":"2025-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145045913","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

Feasibility study of the hemispherical gamma radiation monitoring system (H-RMS) 半球形伽马辐射监测系统（H-RMS）可行性研究

IF 2.6 3区工程技术

Nuclear Engineering and Technology Pub Date : 2025-09-11 DOI: 10.1016/j.net.2025.103900

Seongyeon Lee, Yoon Soo Chung, Min Kyu Baek, Yong Hyun Chung

{"title":"Feasibility study of the hemispherical gamma radiation monitoring system (H-RMS)","authors":"Seongyeon Lee, Yoon Soo Chung, Min Kyu Baek, Yong Hyun Chung","doi":"10.1016/j.net.2025.103900","DOIUrl":"10.1016/j.net.2025.103900","url":null,"abstract":"<div><div>As industrial radiation applications grow rapidly, the radiation monitoring systems are needed to ensure public and environmental safety. A variety of monitoring systems have been developed and used to detect or identify the location and type of radioactive sources. However, it was difficult to identify and locate radionuclides over a large area in real-time.</div><div>In this study, a Hemispherical Gamma Radiation Monitoring System (H-RMS) was developed. A detector row, consisting of 16 detector modules was implemented, with each module composed of a GAGG(Ce), a lead collimator, and a Silicon Photomultiplier (SiPM). It was mounted on an optical table and rotated 180° at 10° intervals to monitor a 2π Field of View (FOV). The performance of each detector module was evaluated by measuring energy resolution and gamma count using <sup>57</sup>Co, <sup>137</sup>Cs and <sup>60</sup>Co radioactive sources. The reconstructed images indicate that the H-RMS is feasible and effective for accurate localization and identification of radioactive materials within a 2π FOV. However, the distance between the source and the H-RMS cannot be determined, preventing the accurate measurement of radioactivity. For further study, the implementation of all detector modules will be necessary.</div></div>","PeriodicalId":19272,"journal":{"name":"Nuclear Engineering and Technology","volume":"58 1","pages":"Article 103900"},"PeriodicalIF":2.6,"publicationDate":"2025-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145045917","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

Comparative analysis of multi-nuclide spectrum recognition methods based on neural network 基于神经网络的多核素谱识别方法比较分析

IF 2.6 3区工程技术

Nuclear Engineering and Technology Pub Date : 2025-09-11 DOI: 10.1016/j.net.2025.103914

Fei Li , Shuang Qi , Zehan Li , Haoran Cao , Shuting Yang , Jun Liu , Chundi Fan

{"title":"Comparative analysis of multi-nuclide spectrum recognition methods based on neural network","authors":"Fei Li , Shuang Qi , Zehan Li , Haoran Cao , Shuting Yang , Jun Liu , Chundi Fan","doi":"10.1016/j.net.2025.103914","DOIUrl":"10.1016/j.net.2025.103914","url":null,"abstract":"<div><div>To address the limitations of traditional peak-finding approaches in complex radiation environments, this paper conducts a systematic comparative analysis of multi-nuclide energy spectrum recognition technology based on neural network methods. Eight nuclides from the industrial nuclide library are selected for the study. The energy spectrum dataset is constructed through the Monte Carlo simulation method, and the performance of four typical neural network models (BP, CNN, ResNet and LSTM) in nuclide identification is compared. The experimental results show that the ResNet model exhibits optimal performance under both expected label formats (1 × 8 and 1 × 1024). Its nuclide recognition accuracy rate is as high as 87.6 %, the average error of relative activity prediction is the lowest at 0.14, and it significantly outperforms other models in weak peak recovery and anti-interference ability. CNN and BP models perform second best in complex tasks, while LSTM models have relatively limited performance due to the indistinct characteristics of energy spectrum sequences. In addition, ResNet demonstrated excellent stability in both high and low activity ranges, verifying its practical application potential in complex radiation fields. This study provides a reference for model selection in the field of nuclide identification and promotes the optimization of neural networks in energy spectrum analysis.</div></div>","PeriodicalId":19272,"journal":{"name":"Nuclear Engineering and Technology","volume":"58 1","pages":"Article 103914"},"PeriodicalIF":2.6,"publicationDate":"2025-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145106421","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

Degradation and failure mechanisms of P-GaN HEMTs in single and complex radiation environments P-GaN hemt在单一和复杂辐射环境中的降解和失效机制

IF 2.6 3区工程技术

Nuclear Engineering and Technology Pub Date : 2025-09-10 DOI: 10.1016/j.net.2025.103902

Yong-chang Sun , Ying Wang , Wan-zhao Cui , Huo-lin Huang , Yan-xing Song , Fei Cao

{"title":"Degradation and failure mechanisms of P-GaN HEMTs in single and complex radiation environments","authors":"Yong-chang Sun , Ying Wang , Wan-zhao Cui , Huo-lin Huang , Yan-xing Song , Fei Cao","doi":"10.1016/j.net.2025.103902","DOIUrl":"10.1016/j.net.2025.103902","url":null,"abstract":"<div><div>In this work, the mechanisms of single-event burnout (SEB) failure and total ionizing dose effect (TID) in P-type gallium nitride gate high electron mobility transistors (P-GaN HEMTs) were investigated based on experiments and simulation. In the SEB experiments, we observed the occurrence of SEB when the drain-source voltage was 350 V with tantalum (Ta) ions irradiation. The simulation results indicate that the local electric field enhancement due to charge enhancement effect and charge collection phenomenon as well as the intensification of collisional ionization are the main causes of device damage and failure. In the TID experiments, three groups of samples with different gate voltage bias were irradiated using Co<sup>60</sup>-γ rays. Positive threshold voltage shifts and gate leakage current increasing are observed. We believe that electron and hole trapping at the P-GaN/AlGaN interface and in the AlGaN barrier layer is the main reason for the threshold voltage shift. In addition, we subjected one of the three groups of samples that had undergone TID experiments to Ta ion single-event effect (SEE) experiments once again. The synergistic experimental results show the superposition effect of the two experiments.</div></div>","PeriodicalId":19272,"journal":{"name":"Nuclear Engineering and Technology","volume":"58 1","pages":"Article 103902"},"PeriodicalIF":2.6,"publicationDate":"2025-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145027214","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

Experimental investigation of reflood heat transfer characteristics on CRUD-deposited surfaces 原油沉积表面回流换热特性实验研究

IF 2.6 3区工程技术

Nuclear Engineering and Technology Pub Date : 2025-09-10 DOI: 10.1016/j.net.2025.103915

Banseok Bae , Youngjae Park , Yunju Lee , Ji Hyun Kim , Hyungdae Kim

{"title":"Experimental investigation of reflood heat transfer characteristics on CRUD-deposited surfaces","authors":"Banseok Bae , Youngjae Park , Yunju Lee , Ji Hyun Kim , Hyungdae Kim","doi":"10.1016/j.net.2025.103915","DOIUrl":"10.1016/j.net.2025.103915","url":null,"abstract":"<div><div>This study experimentally investigates the influence of CRUD on reflood heat transfer performance under bottom reflood conditions following the actuation of ECCS during LOCA in a PWR. To simulate the in-reactor environment, CRUD-deposited test specimens were fabricated under prototypical PWR water chemistry conditions, and reflood experiments were conducted using a single heated rod configuration. Key thermal-hydraulic parameters—including quench front propagation speed, rewetting temperature, critical heat flux, and film boiling heat transfer coefficient—were quantitatively evaluated through high-speed flow visualization and inverse heat conduction analysis based on wall temperature measurements from an embedded thermocouple. The experimental results revealed that, on CRUD-deposited surfaces, the quench front formed earlier and propagated upward at a speed up to 2.3 times faster than that observed on bare surfaces. The CHF increased by up to 1.9 times, while the rewetting temperature rose by as much as 80 °C. The film boiling heat transfer coefficient in the post-CHF region was enhanced by up to 13.6 %, and the overall quenching time was reduced by approximately 50 %. High-speed visualization revealed frequent local vapor film collapses and direct liquid–surface contact events on the CRUD-deposited surfaces. These results indicate that the porous microstructure and hydrophilic surface characteristics of CRUD may promote coolant supply and induce vapor film destabilization, thereby enhancing reflood heat transfer performance of overheated fuel rods during LOCA.</div></div>","PeriodicalId":19272,"journal":{"name":"Nuclear Engineering and Technology","volume":"58 2","pages":"Article 103915"},"PeriodicalIF":2.6,"publicationDate":"2025-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145157133","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