Nuclear Engineering and Technology最新文献_第7页

Experimental and numerical investigation about single-event burnout in power normally-off AlGaN/GaN HEMT

IF 2.6 3区工程技术

Nuclear Engineering and Technology Pub Date : 2025-02-12 DOI: 10.1016/j.net.2025.103538

Zhi-yu Xi , Ying Wang , Xin-Xing Fei , Biao Sun , Huo-lin Huang , Yan-xing Song , Fei Cao

引用次数: 0

A practical cesium axial migration model for fast reactor fuel pins

IF 2.6 3区工程技术

Nuclear Engineering and Technology Pub Date : 2025-02-12 DOI: 10.1016/j.net.2025.103521

Fabien Bernachy-Barbe, Tommaso Barani, Jean-Christophe Dumas, Alexandre Kallen

{"title":"A practical cesium axial migration model for fast reactor fuel pins","authors":"Fabien Bernachy-Barbe, Tommaso Barani, Jean-Christophe Dumas, Alexandre Kallen","doi":"10.1016/j.net.2025.103521","DOIUrl":"10.1016/j.net.2025.103521","url":null,"abstract":"<div><div>Cesium is a volatile fission product which plays a major role in the formation of gap-filling compounds and in the internal cladding corrosion in Fast Breeder Reactor fuel pins operating at elevated temperatures and high burnup. In order to compute reliably the physical and chemical state of the gap, accurate fission product inventories are required. However, volatile species are known to significantly migrate down the radial and axial thermal gradients upon release from the fuel. In the present work, a pragmatic axial diffusion model for cesium is proposed, based on the proven concept of saturation concentration, and an empirical law for computing the vapor pressure of cesium at equilibrium with MOX fuel. This approach is shown to be predictive of the axial distribution of cesium measured through gamma spectrometry for a large database of fuels. Cesium accumulations, which are highly sensitive to local thermal gradients, are satisfactorily reproduced, contributing to the validation of the <span>PLEIADES/GERMINAL V3</span> fuel performance code multiphysics coupling.</div></div>","PeriodicalId":19272,"journal":{"name":"Nuclear Engineering and Technology","volume":"57 7","pages":"Article 103521"},"PeriodicalIF":2.6,"publicationDate":"2025-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143682168","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

Design and implementation of the digital twin system for the negative ion based neutral beam injection

IF 2.6 3区工程技术

Nuclear Engineering and Technology Pub Date : 2025-02-12 DOI: 10.1016/j.net.2025.103540

Yu Gu , Chundong Hu , Yuanzhe Zhao , Yang Li , Qinglong Cui , Ruoxin Bai

引用次数: 0

A case study on the failure of the electrical panel of nuclear power plants by shaking table tests

IF 2.6 3区工程技术

Nuclear Engineering and Technology Pub Date : 2025-02-11 DOI: 10.1016/j.net.2025.103533

Bub-Gyu Jeon , Dong-Uk Park , Sung-Wan Kim , Sung-Jin Chang , Seunghyun Eem , Junhee Park

{"title":"A case study on the failure of the electrical panel of nuclear power plants by shaking table tests","authors":"Bub-Gyu Jeon , Dong-Uk Park , Sung-Wan Kim , Sung-Jin Chang , Seunghyun Eem , Junhee Park","doi":"10.1016/j.net.2025.103533","DOIUrl":"10.1016/j.net.2025.103533","url":null,"abstract":"<div><div>The clearest method to evaluate seismic performance is to test the equipment installed in nuclear power plants using shaking table tests. Accordingly, research is conducted to directly evaluate the seismic performance and limit state via shaking table tests on equipment identical to the specifications supplied to nuclear power plants. Specifically, the fragility level test through the actual equipment test, which primarily aims to investigate the equipment's critical acceleration and failure mode, was carried out. This paper summarizes the limit state of the electrical panel for a nuclear power plant observed via the shaking table test through the damage mode using an actual equipment test. The actual equipment test was performed to check the critical acceleration level and analyze the damage mode on the electrical panels to be tested. Results of the shaking table test on the electrical panel confirmed that functional abnormalities were attributed to shaking and impact. It was also found that functional abnormalities and structural failure can occur in earthquakes of similar magnitude. Moreover, structural failure observed mostly involves damage to the door lock, damage to and/or detachment of the internal parts, and damage to connecting members, usually concentrated in the components that support heavy parts.</div></div>","PeriodicalId":19272,"journal":{"name":"Nuclear Engineering and Technology","volume":"57 7","pages":"Article 103533"},"PeriodicalIF":2.6,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143682176","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

Effects of high misfit on isothermal β → ω phase transformation in Ti-19V alloy: A three-dimensional phase-field simulation

IF 2.6 3区工程技术

Nuclear Engineering and Technology Pub Date : 2025-02-11 DOI: 10.1016/j.net.2025.103537

Shisen Gao , Xuxi Liu , Penghui Lei , Wenbo Liu

{"title":"Effects of high misfit on isothermal β → ω phase transformation in Ti-19V alloy: A three-dimensional phase-field simulation","authors":"Shisen Gao , Xuxi Liu , Penghui Lei , Wenbo Liu","doi":"10.1016/j.net.2025.103537","DOIUrl":"10.1016/j.net.2025.103537","url":null,"abstract":"<div><div>Titanium-based alloys have been used extensively in the nuclear applications, aerospace industry, medical domain, military field, petrochemical industry and other high-tech areas. The omega (ω) phase formation significantly impacts the mechanical and physical properties of Titanium alloys. This study developed a phase-field model to simulate the microstructural evolution during the isothermal β → ω phase transformation in a Ti-19 at.%V alloy. While reflecting the essential physics of a mixed diffusive–displacive mechanism that leads to β → ω phase transformation and considering the interplay between the interfacial energy and elastic strain energy on the morphology of ω precipitates, the simulations appropriately predicted the microstructural evolution of the ω phase and the ω precipitates homogeneously distributed in the β matrix. During the isothermal evolution of ω precipitates, the morphology of ω precipitates changes from ellipsoidal to cuboidal, which is the result of the combined effect of anisotropic interfacial energy, elastic strain energy and impingement.</div></div>","PeriodicalId":19272,"journal":{"name":"Nuclear Engineering and Technology","volume":"57 7","pages":"Article 103537"},"PeriodicalIF":2.6,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143682170","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

Leveraging machine learning for accurate DNBR prediction using python

IF 2.6 3区工程技术

Nuclear Engineering and Technology Pub Date : 2025-02-11 DOI: 10.1016/j.net.2025.103532

Mohamed Y.M. Mohsen , Meshari Al Meshari , Yasser Alzamil , Abdulrahman Alhammad , Khaled Alenazi , Atef El-Taher , Tarek F. Nagla , Mohamed A.E. Abdel-Rahman

{"title":"Leveraging machine learning for accurate DNBR prediction using python","authors":"Mohamed Y.M. Mohsen , Meshari Al Meshari , Yasser Alzamil , Abdulrahman Alhammad , Khaled Alenazi , Atef El-Taher , Tarek F. Nagla , Mohamed A.E. Abdel-Rahman","doi":"10.1016/j.net.2025.103532","DOIUrl":"10.1016/j.net.2025.103532","url":null,"abstract":"<div><div>This study investigates the viability of using Python scikit-learn packages, specifically regression techniques, to forecast the departure from nucleate boiling ratio (DNBR) using previously published datasets as reference. These datasets were generated using the COBRA-IV computer code under specific operational conditions for pressurized water reactors, and are categorized into two groups: steady-state, encompassing cases 1 and 2, and transient-state which includes both the loss of flow accident (LOFA) and rod cluster control assembly (RCCA) withdrawal scenarios. Due to the dataset's small size, this study also addressed the difficulties encountered with enhancing the accuracy of regression models. Several approaches were investigated in an attempt to improve the regression's accuracy, these include feature selection and hyperparameters tuning analysis for each regression model. The use of noise perturbation with a realistic standard deviation proved to be the most successful strategy for increasing regression accuracy, especially with small datasets, by interpolating the gaps between observations thus increasing their size. This approach's algorithm was evaluated using metrics such as R<sup>2</sup> score, mean square error (MSE) and mean absolute error (MAE). The evaluation metrics demonstrated that the DTReg model, after incorporating noise, achieved significantly higher accuracy compared to previously referenced artificial neural network (ANN) models, highlighting the substantial impact of noise perturbation on refining the model's predictive capabilities. Overall, this approach not only improved performance for the steady-state cases but also enhanced accuracy for transient datasets, ultimately demonstrating the effectiveness of noise perturbation in overcoming the limitations of small datasets.</div></div>","PeriodicalId":19272,"journal":{"name":"Nuclear Engineering and Technology","volume":"57 7","pages":"Article 103532"},"PeriodicalIF":2.6,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143682181","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

Utilization of reverse osmosis and nanofiltration for the separation of SiO2 from boric acid solutions at nuclear power plants

IF 2.6 3区工程技术

Nuclear Engineering and Technology Pub Date : 2025-02-11 DOI: 10.1016/j.net.2025.103528

Šárka Lásková, Thi Minh Do, Anna Sears, Pavel Kůs

{"title":"Utilization of reverse osmosis and nanofiltration for the separation of SiO2 from boric acid solutions at nuclear power plants","authors":"Šárka Lásková, Thi Minh Do, Anna Sears, Pavel Kůs","doi":"10.1016/j.net.2025.103528","DOIUrl":"10.1016/j.net.2025.103528","url":null,"abstract":"<div><div>Even though the problem with an increasing SiO<sub>2</sub> concentration in the reactor cooling system (RCS) emerges at most nuclear power plants, no publications yet have focused on the separation of SiO<sub>2</sub> from solutions simulating RCS composition regarding boric acid (16 g/L) and silica concentrations (0–12 mg/L). Therefore, we examined the utilization of reverse osmosis and nanofiltration to separate SiO<sub>2</sub> from H<sub>3</sub>BO<sub>3</sub> solutions simulating RCS composition to meet the operation limits of SiO<sub>2</sub> and to minimize additional costs for H<sub>3</sub>BO<sub>3</sub> refill. The rejection of both H<sub>3</sub>BO<sub>3</sub> and SiO<sub>2</sub> by reverse osmosis was generally high (>90%). The maximal separation efficiency of SiO<sub>2</sub> from H<sub>3</sub>BO<sub>3</sub> was achieved at low pH and high temperature and was 1.30. The rejection of H<sub>3</sub>BO<sub>3</sub> by nanofiltration was around 20% and of SiO<sub>2</sub> around 80%. The highest separation efficiency was achieved at low pH and intermediate SiO<sub>2</sub> concentrations and was 2.23. To achieve the operation limits for SiO<sub>2</sub>, a multi-stage nanofiltration system must be used for the solutions with intermediate and high SiO<sub>2</sub> concentrations. Nanofiltration is for the separation of SiO<sub>2</sub> from H<sub>3</sub>BO<sub>3</sub> solutions more favorable than reverse osmosis, because of the higher separation efficiency of SiO<sub>2</sub> from H<sub>3</sub>BO<sub>3</sub>, and thus, lower H<sub>3</sub>BO<sub>3</sub> loss.</div></div>","PeriodicalId":19272,"journal":{"name":"Nuclear Engineering and Technology","volume":"57 7","pages":"Article 103528"},"PeriodicalIF":2.6,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143681673","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

Design of a PG-SPECT for boron concentration monitoring in BNCT at XJTU

IF 2.6 3区工程技术

Nuclear Engineering and Technology Pub Date : 2025-02-10 DOI: 10.1016/j.net.2025.103499

Jingjing Fan , Quanxu Jiang , Yaocheng Hu , Zheng Han , Yuqi Dai , Yongze Liu , Kai Liu , Taketani Atsushi , Mingfei Yan , Sheng Wang

{"title":"Design of a PG-SPECT for boron concentration monitoring in BNCT at XJTU","authors":"Jingjing Fan , Quanxu Jiang , Yaocheng Hu , Zheng Han , Yuqi Dai , Yongze Liu , Kai Liu , Taketani Atsushi , Mingfei Yan , Sheng Wang","doi":"10.1016/j.net.2025.103499","DOIUrl":"10.1016/j.net.2025.103499","url":null,"abstract":"<div><div>Boron Neutron Capture Therapy (BNCT) has garnered significant attention in cancer treatment in recent years. As the efficacy of BNCT relies on the radiation dose deposited in the tumor region through the reaction of <sup>10</sup>B(n, α) <sup>7</sup>Li, the boron concentration monitoring within the cancer tissue is extremely important. In this study, we have proposed a Single Photon Emission Computed Tomography (SPECT) system by using 478 keV prompt gamma rays emitted from the reaction above for X-BNCT, which mainly consists of three groups of collimator and CZT detector arrays. Simultaneous Algebraic Reconstruction Technique (SART) and Maximum Likelihood-Expectation Maximization (ML-EM), as well as the convex set Adaptive Steepest Descent Projection Onto Convex Sets algorithm (ASD-POCS) were utilized to image reconstruction with projection data simulated by PHITS code for different types of tumor phantoms. The following conclusions were achieved: the highest reconstruction accuracy was obtained by ASD-POCS algorithm under 12 or 18 views, while ML-EM algorithm took much shorter reconstruction time; the tumors located at the depth of 7 cm under subcutaneous tissue can be satisfactorily reconstructed; an acquisition time of 240s was recommended to achieve compromise results in considering of image quality and treatment time under beam current of 20 mA.</div></div>","PeriodicalId":19272,"journal":{"name":"Nuclear Engineering and Technology","volume":"57 7","pages":"Article 103499"},"PeriodicalIF":2.6,"publicationDate":"2025-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143682108","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

Microstructure characteristic and corrosion resistance of pressure resistance seal welded joint of clad tubes

IF 2.6 3区工程技术

Nuclear Engineering and Technology Pub Date : 2025-02-10 DOI: 10.1016/j.net.2025.103534

Jian Lin , Ziang Zhou , Shuncheng Ji , Zhandong Wan , Li Lu

{"title":"Microstructure characteristic and corrosion resistance of pressure resistance seal welded joint of clad tubes","authors":"Jian Lin , Ziang Zhou , Shuncheng Ji , Zhandong Wan , Li Lu","doi":"10.1016/j.net.2025.103534","DOIUrl":"10.1016/j.net.2025.103534","url":null,"abstract":"<div><div>The zirconium alloy clad tube provides a protection and room for the nuclear reaction of fuel rods in the nuclear power plant. The clad tubes are usually sealed up by pressure resistance welding with the end plugs. The non-equilibrium physical metallurgy, caused by welding, often brings about a non-uniformity of microstructure and corrosion resistance in the zirconium alloy joint. In order to investigate the influence of the microstructure on the service performance of the welded joint corrosion experiments were designed and conducted by amplifying the mechanical and heat-affected zone in the joint, using a thermal and mechanical simulation machine. It was shown that the amplified sample had the similar microstructure and micro hardness with the mechanical and heat-affected zone. The corrosion rate of the mechanical and heat-affected zone was higher than that of the base metal of the clad tube. A heat treatment after welding was proposed to weaken the influence of microstructure difference on its corrosive resistance. It was shown that the corrosive resistance could be improved by modifying the microstructure appearance and the distribution of the second phase particles.</div></div>","PeriodicalId":19272,"journal":{"name":"Nuclear Engineering and Technology","volume":"57 7","pages":"Article 103534"},"PeriodicalIF":2.6,"publicationDate":"2025-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143681667","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

Simulation study of high-quality electron beam injector for external injection of laser plasma wakefield acceleration

IF 2.6 3区工程技术

Nuclear Engineering and Technology Pub Date : 2025-02-09 DOI: 10.1016/j.net.2025.103531

Lanxin Liu , Jianhua Zhong , Jiabao Guan , Zeyi Dai , Guoxing Xia , Jike Wang , Yuancun Nie

{"title":"Simulation study of high-quality electron beam injector for external injection of laser plasma wakefield acceleration","authors":"Lanxin Liu , Jianhua Zhong , Jiabao Guan , Zeyi Dai , Guoxing Xia , Jike Wang , Yuancun Nie","doi":"10.1016/j.net.2025.103531","DOIUrl":"10.1016/j.net.2025.103531","url":null,"abstract":"<div><div>The laser wakefield acceleration (LWFA) with external injection requires high-quality, ultra-short electron bunches, which can be produced by using a photocathode injector based on the room-temperature RF electron gun. In this paper, the physics design of such a photocathode injector system is discussed for two operating modes: low charge (10 pC) and high charge (50 pC). The front end of the injector was optimized by combining the beam dynamics simulation software ASTRA with the multi-objective genetic algorithm NSGA-II. The downstream section was simulated using CSRtrack and ASTRA to optimize the magnetic chicane and match the Twiss parameters. A slit collimator was inserted in the middle of the chicane to filter part of the electrons, and hence shorten the bunch length and reduce the relative energy spread. The obtained beam parameters meet the requirements for an external injection of the LWFA, where the electrons can be further accelerated from 100 MeV to 1.5 GeV. Such a photocathode injector combined with the LWFA has the potential to be applied in the accumulation injection of a 1.5 GeV storage ring at Wuhan Advanced Light Source.</div></div>","PeriodicalId":19272,"journal":{"name":"Nuclear Engineering and Technology","volume":"57 7","pages":"Article 103531"},"PeriodicalIF":2.6,"publicationDate":"2025-02-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143682177","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