Nuclear Engineering and Technology最新文献_第6页

Radionuclides measurements using Raman spectrometers for the analysis of advanced nuclear reprocessing 先进核后处理分析用拉曼光谱仪测量放射性核素

IF 2.6 3区工程技术

Nuclear Engineering and Technology Pub Date : 2025-03-24 DOI: 10.1016/j.net.2025.103605

L.J. Bonales, I. Sánchez-García, H. Galán

引用次数: 0

Zeolite and silica fume as enhancers for cementitious solidification of borate radioactive waste 沸石和硅灰作为硼酸盐放射性废物胶凝固化的增强剂

IF 2.6 3区工程技术

Nuclear Engineering and Technology Pub Date : 2025-03-24 DOI: 10.1016/j.net.2025.103609

Xinfeng Liu , Chunguang Li , Zhimeng Yao , Shengdong Zhang , Zhenzhong Liu , Longcheng Liu , Tianle Li

{"title":"Zeolite and silica fume as enhancers for cementitious solidification of borate radioactive waste","authors":"Xinfeng Liu , Chunguang Li , Zhimeng Yao , Shengdong Zhang , Zhenzhong Liu , Longcheng Liu , Tianle Li","doi":"10.1016/j.net.2025.103609","DOIUrl":"10.1016/j.net.2025.103609","url":null,"abstract":"<div><div>Low- and medium-level borate radioactive liquid wastes are common liquid wastes generated during the operation and decommissioning of nuclear power plants. These wastes pose significant risks to environmental safety and public health, necessitating effective solidification methods for safe disposal. In this study, the use of zeolite and silica fume as additives to increase the performance of cemented forms of waste was investigated. Five formulations were evaluated for compressive strength, impact resistance, freeze‒thaw resistance, gamma irradiation resistance, immersion resistance, and leaching resistance. The results indicate that the combination of 10 % zeolite and 5 % silica fume (Z10-SF5) significantly improved the mechanical properties and durability of the solidified forms of waste under harsh environmental conditions, including freeze‒thaw cycles, gamma irradiation, and immersion. The results also exhibited outstanding leaching resistance, reducing the cumulative boron leaching fraction by 65 % compared with that of the control. X-ray diffraction (XRD), scanning electron microscopy (SEM), and mercury intrusion porosimetry (MIP) analyses revealed that the additives promoted C-S-H gel formation and improved the pore structure and density of the solidified form. These findings highlight the potential of zeolite and silica fume in advancing the long-term stabilization of borate radioactive waste.</div></div>","PeriodicalId":19272,"journal":{"name":"Nuclear Engineering and Technology","volume":"57 9","pages":"Article 103609"},"PeriodicalIF":2.6,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143739369","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhanced oxidative sulfuric acid leaching of granite-type uranium ore by oxygen nanobubbles: Kinetics and mechanism 氧纳米泡强化花岗岩型铀矿石氧化硫酸浸出：动力学与机理

IF 2.6 3区工程技术

Nuclear Engineering and Technology Pub Date : 2025-03-24 DOI: 10.1016/j.net.2025.103608

Ting Li , Guangyue Li , Xiaohui Liu , Jing Sun , Qian Li , Zhao Cui

{"title":"Enhanced oxidative sulfuric acid leaching of granite-type uranium ore by oxygen nanobubbles: Kinetics and mechanism","authors":"Ting Li , Guangyue Li , Xiaohui Liu , Jing Sun , Qian Li , Zhao Cui","doi":"10.1016/j.net.2025.103608","DOIUrl":"10.1016/j.net.2025.103608","url":null,"abstract":"<div><div>Developing eco-friendly and highly efficient uranium-enhanced leaching technologies is crucial for ensuring the reliable supply of uranium resources. This study integrates nanobubble (NB) technology into the acid leaching process of granite-type uranium ore by employing oxygen NBs as an effective, clean oxidant to enhance uranium leaching. The feasibility of using oxygen NBs was first validated theoretically, and subsequent batch experiments were conducted to investigate the enhanced leaching kinetics and mechanism. The results demonstrate that oxygen NB-enhanced leaching follows a shrinking core model dominated by product layer diffusion, with an Arrhenius activation energy of 8.37 kJ/mol. Under optimal conditions (15 g/L H<sub>2</sub>SO<sub>4</sub>, 180 rpm, 5 % pulp density, and 30 °C), oxygen NBs increased uranium leaching efficiency by 8.20 % compared to conventional sulfuric acid leaching. Three key mechanisms contribute to this enhancement: (i) efficient oxidation of U(IV) to U(VI) via continuous dissolution of molecular oxygen and generation of hydroxyl radicals; (ii) expansion of leaching pathways through high-energy microarea effects that further disrupt the ore structure; and (iii) reduction of leaching inhibition by preventing sulfate precipitate deposition on mineral surfaces. These findings underscore the potential of oxygen NB-enhanced oxidative leaching for sustainable, cost-effective uranium extraction, warranting pilot-scale studies for industrial application.</div></div>","PeriodicalId":19272,"journal":{"name":"Nuclear Engineering and Technology","volume":"57 8","pages":"Article 103608"},"PeriodicalIF":2.6,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143725129","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Chlorination pathways of lanthanide and actinide oxides in LiCl-KCl molten salt: Electrochemical and spectroscopic studies 镧系和锕系氧化物在LiCl-KCl熔盐中的氯化途径：电化学和光谱研究

IF 2.6 3区工程技术

Nuclear Engineering and Technology Pub Date : 2025-03-24 DOI: 10.1016/j.net.2025.103610

Chan-Yong Jung , Hwakyeung Jeong , Tae-Hyeong Kim , Han Lim Cha , Hye-Ryun Cho , Tae-Hong Park , Sang-Eun Bae

{"title":"Chlorination pathways of lanthanide and actinide oxides in LiCl-KCl molten salt: Electrochemical and spectroscopic studies","authors":"Chan-Yong Jung , Hwakyeung Jeong , Tae-Hyeong Kim , Han Lim Cha , Hye-Ryun Cho , Tae-Hong Park , Sang-Eun Bae","doi":"10.1016/j.net.2025.103610","DOIUrl":"10.1016/j.net.2025.103610","url":null,"abstract":"<div><div>Pyroprocessing is a critical technology for recycling spent nuclear fuel, which enhances the sustainability of nuclear power generation. This process begins with metal oxides, which must be converted into metal chlorides to facilitate further processing, including electrorefining and electrowinning. In this work, we investigate the chlorination of lanthanide (Nd, Gd) and actinide (Th, Np) oxides in LiCl-KCl molten salt and confirm the chlorination through electrochemical and spectroscopic analyses. Nd<sub>2</sub>O<sub>3</sub> and Gd<sub>2</sub>O<sub>3</sub> are chlorinated using NH<sub>4</sub>Cl, with electrochemical measurements demonstrating the electrodeposition and dissolution currents of Nd<sup>3+</sup> and Gd<sup>3+</sup> ions. Th and Np chlorides are prepared using AlCl<sub>3</sub> as a reactant. The reaction between ThO<sub>2</sub> and AlCl<sub>3</sub> produces ThCl<sub>4</sub>, as evidenced by the electrodeposition-dissolution currents of Th<sup>4+</sup>. For the chlorination of NpO<sub>2</sub>, NpO<sub>2</sub>Cl is first prepared by dissolving NpO<sub>2</sub> in acidic solutions and then drying. Subsequently, the reaction of NpO<sub>2</sub>Cl and AlCl<sub>3</sub> in molten LiCl-KCl yields NpCl<sub>4</sub>. Electrochemical and UV–Vis spectroscopic measurements confirm the redox reactions of Np<sup>4+</sup>/Np<sup>3+</sup>/Np<sup>0</sup> and the presence of NpCl<sub>4</sub> in the molten LiCl–KCl, respectively.</div></div>","PeriodicalId":19272,"journal":{"name":"Nuclear Engineering and Technology","volume":"57 8","pages":"Article 103610"},"PeriodicalIF":2.6,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143768796","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Measurement of radioactive contamination of plant fertilizers used in Palestine 巴勒斯坦使用的植物肥料放射性污染的测量

IF 2.6 3区工程技术

Nuclear Engineering and Technology Pub Date : 2025-03-24 DOI: 10.1016/j.net.2025.103607

Khalil M. Thabayneh, Heba M. Hreaz

{"title":"Measurement of radioactive contamination of plant fertilizers used in Palestine","authors":"Khalil M. Thabayneh, Heba M. Hreaz","doi":"10.1016/j.net.2025.103607","DOIUrl":"10.1016/j.net.2025.103607","url":null,"abstract":"<div><div>Intensive agriculture requires extensive use of fertilizers as a supportive and fortifying source for the soil to increase its productivity. Among these fertilizers used are industrial fertilizers, which are an essential source of nitrogen, phosphorus and potassium. With the increased use of such types of fertilizers, the percentage of environmental pollution with radioactive elements increases. The current study aims to estimate the level of radioactive contamination in selected samples of commonly used vegetable fertilizers by using CR-39 detectors. The analysis of radon and radium concentrations for different types of fertilizer samples is important, because of its effects on correcting the consumption of these products and reducing their side effects. The average values of radon and radium concentration in all collected samples vary from 119.0 to 570.4 <em>Bq.m</em><sup><em>−3</em></sup> and 13.5–72.1 <em>Bq.kg</em><sup><em>−1</em></sup> with a total average values of 270.6 <em>Bq.m</em><sup><em>−3</em></sup> and 31.9 <em>Bq.kg</em><sup><em>−1</em></sup>, respectively<sup>.</sup> To evaluate the radiological hazards, the annual effective dose and the exhalation rates in these samples were computed. The activity levels measured in this study form a baseline database that can be used as a point of reference for subsequent research to show the effects of upcoming occurrences.</div></div>","PeriodicalId":19272,"journal":{"name":"Nuclear Engineering and Technology","volume":"57 9","pages":"Article 103607"},"PeriodicalIF":2.6,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143747807","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Explainable machine-learning tools for predictive maintenance of circulating water systems in nuclear power plants 用于核电厂循环水系统预测性维护的可解释的机器学习工具

IF 2.6 3区工程技术

Nuclear Engineering and Technology Pub Date : 2025-03-24 DOI: 10.1016/j.net.2025.103588

Linyu Lin, Cody Walker, Vivek Agarwal

{"title":"Explainable machine-learning tools for predictive maintenance of circulating water systems in nuclear power plants","authors":"Linyu Lin, Cody Walker, Vivek Agarwal","doi":"10.1016/j.net.2025.103588","DOIUrl":"10.1016/j.net.2025.103588","url":null,"abstract":"<div><div>Predictive maintenance (PdM) is one of the strategies that has shown great potentials in achieving substantial cost savings and enhancing the economic competitiveness of nuclear power plants in the current energy market. PdM strategy taking advantage of advancements in machine learning (ML) technologies have demonstrated ability in handling high dimensional and multivariate data and in extracting hidden relationships within data in industrial environments. While ML technologies show great potentials, their lack of explainability, especially in considering multiple aspects in human-scale explanation-giving tasks, is one of the major hurdles to their adoptions. The research presented in this paper develops an explainable ML solutions by accounting for four attributes of explainable artificial intelligence, including the contextual factors, explainable model options, post-hoc explanations for black-box models using Shapley additive explanations and local interpretable model-agnostic explanations, and graphical user interface for human cognitive capacity and limitations. This tool is then applied to the conducting of PdM tasks for a circulating water system in a nuclear power plant.</div></div>","PeriodicalId":19272,"journal":{"name":"Nuclear Engineering and Technology","volume":"57 9","pages":"Article 103588"},"PeriodicalIF":2.6,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143822383","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

From visual representation to signal flow connection: A new modeling approach for STAMP 从可视化表示到信号流连接：一种新的STAMP建模方法

IF 2.6 3区工程技术

Nuclear Engineering and Technology Pub Date : 2025-03-22 DOI: 10.1016/j.net.2025.103602

Sung-Min Shin, Seong Woo Kang, Jinkyun Park

{"title":"From visual representation to signal flow connection: A new modeling approach for STAMP","authors":"Sung-Min Shin, Seong Woo Kang, Jinkyun Park","doi":"10.1016/j.net.2025.103602","DOIUrl":"10.1016/j.net.2025.103602","url":null,"abstract":"<div><div>System-Theoretic Accident Model and Processes (STAMP) and System-Theoretic Process Analysis (STPA) have emerged as novel perspectives for analyzing hazards in control systems, revealing previously unnoticed hazards that traditional failure propagation analyses may overlook. Their contribution, therefore, holds significant implications in hazard analysis, but a challenge arises in the modeling of cl systems at a fairly detailed level, where it becomes inefficient to distinguish the flow of a particular signal. To address this concern, this paper proposes the digital representation of the modeling elements and the correlation between the elements in STAMP. The digitally represented STAMP can be used to distinguish the flow of a particular signal and can also be used as a basis for the implementation of supportive functions for STPA. Therefore, potential applications, e.g. highlighting or reorganizing a specific signal flow, incomplete part identification within a control structure, impact of the unavailability of a system element, are also discussed in this paper. The authors believe that the digital representation of STAMP and its applications proposed in this paper will improve the efficiency of the process of performing STAMP/STPA at a detailed level.</div></div>","PeriodicalId":19272,"journal":{"name":"Nuclear Engineering and Technology","volume":"57 8","pages":"Article 103602"},"PeriodicalIF":2.6,"publicationDate":"2025-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143715043","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Floor response characteristics of NPP auxiliary building subjected to bi-directional ground motions 核电站辅助建筑在双向地面运动下的楼层响应特性

IF 2.6 3区工程技术

Nuclear Engineering and Technology Pub Date : 2025-03-22 DOI: 10.1016/j.net.2025.103599

Bidhek Thusa , Duy-Duan Nguyen , Md Samdani Azad , Tae-Hyung Lee

{"title":"Floor response characteristics of NPP auxiliary building subjected to bi-directional ground motions","authors":"Bidhek Thusa , Duy-Duan Nguyen , Md Samdani Azad , Tae-Hyung Lee","doi":"10.1016/j.net.2025.103599","DOIUrl":"10.1016/j.net.2025.103599","url":null,"abstract":"<div><div>The objective of this study is to investigate the seismic floor response characteristics at critical locations of the auxiliary building (AB) of a nuclear power plant. AB is so irregular that floor responses at different locations are expected to be different even at the same floor. Time history analyses are performed for a finite element model of AB for various bi-directional ground motions. It is observed that floor response spectra at 12 distinct locations are significantly different. The bi-directional effect is observed to be 24 %–42 % higher when compared to uni-directional cases. The response trajectory due to bi-directional motions shows the major direction of response are variable and solely depends on the ground motion properties suggesting the current analysis techniques being viable for over/under estimation of floor responses. The critical angle of incidence for AB is found to be 105°. Hence, this study also suggests virtually dividing a floor into several groups based on their seismic response characteristics for an efficient evaluation of the seismic performance of large structures like AB.</div></div>","PeriodicalId":19272,"journal":{"name":"Nuclear Engineering and Technology","volume":"57 8","pages":"Article 103599"},"PeriodicalIF":2.6,"publicationDate":"2025-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143705040","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Development of Bamboo-Transient2.0 for three-dimensional PWR-core pin-by-pin Transient analysis 基于Bamboo-Transient2.0的三维PWR-core逐脚瞬态分析开发

IF 2.6 3区工程技术

Nuclear Engineering and Technology Pub Date : 2025-03-22 DOI: 10.1016/j.net.2025.103598

Junwei Qin, Yunzhao Li, Liangzhi Cao

{"title":"Development of Bamboo-Transient2.0 for three-dimensional PWR-core pin-by-pin Transient analysis","authors":"Junwei Qin, Yunzhao Li, Liangzhi Cao","doi":"10.1016/j.net.2025.103598","DOIUrl":"10.1016/j.net.2025.103598","url":null,"abstract":"<div><div>In order to ensure the safety of the core, three-dimensional whole-core transient analysis would be carried out to obtain the pin-power distribution required by safety analysis. For this purpose, this paper presents the development of Bamboo-Transient2.0, a three-dimensional pin-by-pin transient analysis program. It adopts a fully-implicit backward finite difference method for time variable discretization, a method of exponential function expansion nodal (EFEN) SP<sub>3</sub> for spatial and angle domain neutronic calculation, and a multi-channel model for the thermal-hydraulic feedback calculation. In addition, Picard iteration is used to couple the neutronics and the thermal-hydraulics, which is intended to guarantee the convergence of coupling iteration at each time step. Moreover, the program can perform parallel computing based on Message Passing Interface (MPI) for the whole-core pin-by-pin transient analysis. Besides, a series of acceleration techniques have been applied to further reduce the computational time. The methodology and code implementation have been verified via a series of numerical tests. As demonstrated by the numerical results, the code developed in this paper shows good agreement with the reference. Furthermore, the acceleration method used in this paper enables a 141.5 times speedup in SP<sub>3</sub> neutron kinetics calculation, while the parallel efficiency maintains above 80 %. Bamboo-Transient2.0 can yield great results, whose pin-wise distributions of state parameters are reliable and thus can satisfactorily meet the requirements and purpose of safety analysis.</div></div>","PeriodicalId":19272,"journal":{"name":"Nuclear Engineering and Technology","volume":"57 8","pages":"Article 103598"},"PeriodicalIF":2.6,"publicationDate":"2025-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143715046","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Assess the possibility of lead radioactive isotope accumulation in plant samples and the effective dose 评估植物样品中铅放射性同位素积累的可能性和有效剂量

IF 2.6 3区工程技术

Nuclear Engineering and Technology Pub Date : 2025-03-22 DOI: 10.1016/j.net.2025.103581

Vu Ngoc Ba , Huynh Truc Van , Truong Thi Hong Loan

{"title":"Assess the possibility of lead radioactive isotope accumulation in plant samples and the effective dose","authors":"Vu Ngoc Ba , Huynh Truc Van , Truong Thi Hong Loan","doi":"10.1016/j.net.2025.103581","DOIUrl":"10.1016/j.net.2025.103581","url":null,"abstract":"<div><div>In this study, the radioactive lead concentration in vegetable samples and the irradiation dose were estimated by the HPGe gamma spectrometer system. The results showed that, in spinach samples, the radioactive concentrations of lead isotopes were positively correlated with each other, with a correlation coefficient of 0.63–0.87. The concentration of radioactive lead in the vegetable samples was within the limits set by the UNSCEAR organization. The annual committed effective dose of <sup>210</sup>Pb accounts for more than 99 % of the total dose of lead radionuclides and is within the world average values of UNSCEAR. Agglomerative Hierarchical Clustering (AHC) method to cluster the ability to accumulate lead radioactive isotopes in vegetable samples is 3 group. Vegetarians have the highest annual committed effective dose among the studied groups. The gastrointestinal absorption from the daily diet into the bloodstream of <sup>210</sup>Pb is approximately 2.4 mBq d<sup>−1</sup>. Therefore, vegetable samples from Ho Chi Minh City are safe for human consumption in the aspect of lead radionuclides.</div></div>","PeriodicalId":19272,"journal":{"name":"Nuclear Engineering and Technology","volume":"57 8","pages":"Article 103581"},"PeriodicalIF":2.6,"publicationDate":"2025-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143682198","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0