Nuclear Engineering and Technology最新文献_第10页

Optimization of a large-area grid electrode for negative ion source in fusion neutral beam injector 聚变中性束注入器负离子源大面积网格电极的优化

IF 2.6 3区工程技术

Nuclear Engineering and Technology Pub Date : 2025-02-01 DOI: 10.1016/j.net.2024.08.051

Jinhong Wang , Yan Wang , Yuwen Yang , Yuming Gu , Yahong Xie , Lizhen Liang , Jianglong Wei

{"title":"Optimization of a large-area grid electrode for negative ion source in fusion neutral beam injector","authors":"Jinhong Wang , Yan Wang , Yuwen Yang , Yuming Gu , Yahong Xie , Lizhen Liang , Jianglong Wei","doi":"10.1016/j.net.2024.08.051","DOIUrl":"10.1016/j.net.2024.08.051","url":null,"abstract":"<div><div>At present, the CRAFT (Comprehensive Research Facility for Fusion Technology) dual-driver negative ion source for neutral beam injection applications has made progress. In order to solve the problem of heat removal function in large-area extraction grid, the multi-physics simulation, manufacturing and testing are carried out. Two simulation conditions before Cs seeding (J<sub>e</sub>∼350 A/m<sup>2</sup>, J<sub>H</sub>-∼50 A/m<sup>2</sup>) and after sufficient Cs conditioning (J<sub>e</sub>∼150 A/m<sup>2</sup>, J<sub>H</sub>-∼250 A/m<sup>2</sup>) were considered to evaluate the power load on EG, which peak power density were 11 and 6 MW/m<sup>2</sup> respectively and were concentrated on locate near the two aperture rows. This paper mainly studies three designs of minor cooling channels (double bending channels, double straight channels, and single straight channel). First, the grid temperature, thermal stress and thermal deformation are compared with an inlet water rate of 1.21 kg/s at 35 °C, and the channel forming methods and welding types mechanisms are compared. The simulation results show that the thermos-mechanical property of double bending channels is the best, and that of double straight channels is slightly worse. In terms of processing and manufacturing, the yield of double bending channels is lower than double straight channels, and it is easy to leak during the experiment.</div></div>","PeriodicalId":19272,"journal":{"name":"Nuclear Engineering and Technology","volume":"57 2","pages":"Article 103182"},"PeriodicalIF":2.6,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142207222","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

Multi-step multivariate forecasting of transmission power in NPPs using operational and meteorological data 利用运行和气象数据对核电站输电功率进行多步骤多变量预测

IF 2.6 3区工程技术

Nuclear Engineering and Technology Pub Date : 2025-02-01 DOI: 10.1016/j.net.2024.08.038

Jaeseok Yoo , Young-jin Oh , Nam-hyun Kim , Soo-ill Lee , Jaepil Ko

{"title":"Multi-step multivariate forecasting of transmission power in NPPs using operational and meteorological data","authors":"Jaeseok Yoo , Young-jin Oh , Nam-hyun Kim , Soo-ill Lee , Jaepil Ko","doi":"10.1016/j.net.2024.08.038","DOIUrl":"10.1016/j.net.2024.08.038","url":null,"abstract":"<div><div>As the proportion of renewable energy has increased in the national power grid of Republic of Korea, various efforts are needed to maintain the stability of total power generation. All kinds of power plants, including nuclear power, must notify the grid operation organization of their expected transmission power. Even in NPPs, the accuracy of transmission power forecasting can increase the plant owner's economic benefits as well as the stability of the power grid. The transmission power of a NPP is affected by various plant conditions and environmental conditions, including the temperature of circulating water (sea water). In this study, we explored how to effectively handle the long-term dependence problem and various data characteristics to increase the forecasting accuracy of transmission power in NPPs by introducing a Seq2Seq model with an encoder-decoder structure and an attention mechanism, beyond traditional time series deep learning models, especially LSTM. This approach will improve the accuracy of transmission power forecasting and contribute to a stable power supply. Additionally, the model is expected to provide a realistic and practical solution for the power demand response of power plants.</div></div>","PeriodicalId":19272,"journal":{"name":"Nuclear Engineering and Technology","volume":"57 2","pages":"Article 103169"},"PeriodicalIF":2.6,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142207243","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

Performances of halide scintillators for the dosimetry based on gamma-ray spectrometry for environmental monitoring systems 卤化物闪烁体在环境监测系统伽马射线分光计基础上的剂量测定性能

IF 2.6 3区工程技术

Nuclear Engineering and Technology Pub Date : 2025-02-01 DOI: 10.1016/j.net.2024.08.042

Wanook Ji, Eunjoong Lee, Young-Yong Ji

{"title":"Performances of halide scintillators for the dosimetry based on gamma-ray spectrometry for environmental monitoring systems","authors":"Wanook Ji, Eunjoong Lee, Young-Yong Ji","doi":"10.1016/j.net.2024.08.042","DOIUrl":"10.1016/j.net.2024.08.042","url":null,"abstract":"<div><div>High pressure ion chambers (HPIC) and NaI(Tl) scintillation detectors are widely used to monitor the ambient dose equivalent rate H∗(10) within and around the Korean nuclear facilities. However, HPIC cannot provide spectrometric information and NaI(Tl) detector is limited in identifying nuclides, such as <sup>131</sup>I, <sup>134</sup>Cs, and <sup>137</sup>Cs, released from nuclear facilities owing to its insufficient energy resolution. This study employed four halide scintillators – LaBr<sub>3</sub>(Ce), CeBr<sub>3</sub>, and SrI<sub>2</sub>(Eu) – to measure the ambient dose equivalent rate and detect gamma nuclides from measured energy spectrum. First, the pulse–shaping time in the signal processing unit was optimized for each scintillator. Second, energy resolution and counting efficiency were estimated for <sup>137</sup>Cs and <sup>60</sup>Co. Finally, an irradiation test was performed to estimate the dose rate. Based on these results, LaBr<sub>3</sub>(Ce) and NaI(Tl) were selected as in situ gamma spectrometry system for measuring environmental radiation, and field experiments were conducted near the Fukushima Daiichi nuclear power plant to measure the dose rate.</div></div>","PeriodicalId":19272,"journal":{"name":"Nuclear Engineering and Technology","volume":"57 2","pages":"Article 103173"},"PeriodicalIF":2.6,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142207208","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

Laser cutting study of zirconium alloys for nuclear decommissioning 用于核退役的锆合金激光切割研究

IF 2.6 3区工程技术

Nuclear Engineering and Technology Pub Date : 2025-02-01 DOI: 10.1016/j.net.2024.08.053

Jae Sung Shin , Joonsoo Ock , Sungyeol Choi

引用次数: 0

Electrokinetic in situ leaching of U from low-permeability uranium ore

IF 2.6 3区工程技术

Nuclear Engineering and Technology Pub Date : 2025-02-01 DOI: 10.1016/j.net.2024.09.015

Chunguang Li , Wenji Wang , Zhenzhong Liu , Yongmei Li , Qi Liu , Longcheng Liu

{"title":"Electrokinetic in situ leaching of U from low-permeability uranium ore","authors":"Chunguang Li , Wenji Wang , Zhenzhong Liu , Yongmei Li , Qi Liu , Longcheng Liu","doi":"10.1016/j.net.2024.09.015","DOIUrl":"10.1016/j.net.2024.09.015","url":null,"abstract":"<div><div>In this study, the impacts of electrokinetic in situ leaching of uranium (EK-ISLU) on the pore structure and connectivity of the low-permeability uranium ore and its leaching efficiency were investigated. Our results demonstrated that a direct current field with an intensity of 7.5 V/cm increased the porosity by 7.07 % and enhanced the uranium leaching efficiency by 73.73 % using a sulfuric acid solution. Under electrical stimulation, the leaching agent exhibited uniform penetration ability through combined electromigration and electroosmosis effects, significantly improving the directed migration of the target ions. Various characterization techniques, such as Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy-energy dispersive X-ray spectrometry (SEM-EDS), three-dimensional computed tomography (CT) pore scanning and Brunauer-Emmett-Teller (BET), showed that the electrokinetic-induced action overcame the preferential flow phenomena, promoted the dissolution of the target minerals and gangue rocks, and notably improved the pore structure to ultimately enhance the uranium leaching efficiency. Our results provide valuable insights for the development of innovative technologies aimed at efficiently recovering U from low-permeability uranium ores.</div></div>","PeriodicalId":19272,"journal":{"name":"Nuclear Engineering and Technology","volume":"57 2","pages":"Article 103212"},"PeriodicalIF":2.6,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143099579","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

High temperature mechanical properties of diffusion welded alloy 800H 扩散焊接合金 800H 的高温力学性能

IF 2.6 3区工程技术

Nuclear Engineering and Technology Pub Date : 2025-02-01 DOI: 10.1016/j.net.2024.08.046

Jong-Bae Hwang , Injin Sa , Eung-Seon Kim , Dong-Hyun Lee

{"title":"High temperature mechanical properties of diffusion welded alloy 800H","authors":"Jong-Bae Hwang , Injin Sa , Eung-Seon Kim , Dong-Hyun Lee","doi":"10.1016/j.net.2024.08.046","DOIUrl":"10.1016/j.net.2024.08.046","url":null,"abstract":"<div><div>High temperature mechanical properties of diffusion welded Alloy 800H was investigated to fabricate a printed circuit heat exchanger (PCHE) for high temperature reactor (HTR) systems. Surface treatment was performed on Alloy 800H to transform the solubility product (<em>K</em><sub>sp</sub>) to exceed the reaction quotient (<em>Q</em>). The surface treatment facilitated the grain boundary migration across the interface. The yield strengths exceeded the values described in ASME Section III Division 5 Table HBB-I-14.5 up to 760 °C, while the tensile strengths were comparable to Table HBB-3225-1 up to 700 °C. At 760 °C, the tensile strength was ∼30 MPa lower than the code. The stress-to-rupture values exceeded the expected minimum stress-to-rupture values of Alloy 800H described in Table HBB-I-14.6C. The ductility of the diffusion weldment acquired from the tensile test was comparable to the as-received Alloy 800H. Meanwhile, the formation of the secondary precipitates on the interface during the stress-to-rupture test deteriorated the ductility of the diffusion weldment, which induced intergranular fracture.</div></div>","PeriodicalId":19272,"journal":{"name":"Nuclear Engineering and Technology","volume":"57 2","pages":"Article 103177"},"PeriodicalIF":2.6,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142207230","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 CFD porous model parameters of Korean PWR spent nuclear fuel assemblies for thermal analysis

IF 2.6 3区工程技术

Nuclear Engineering and Technology Pub Date : 2025-02-01 DOI: 10.1016/j.net.2024.09.014

Do Yun Kim , Han-Seop Song , Jae-Ho Jeong , Seung-Hwan Yu

{"title":"Development of CFD porous model parameters of Korean PWR spent nuclear fuel assemblies for thermal analysis","authors":"Do Yun Kim , Han-Seop Song , Jae-Ho Jeong , Seung-Hwan Yu","doi":"10.1016/j.net.2024.09.014","DOIUrl":"10.1016/j.net.2024.09.014","url":null,"abstract":"<div><div>This study focused on developing and validating porous model parameters to accurately estimate the thermal behavior of spent nuclear fuel assemblies for computational fluid dynamics simulations. These assemblies are stored in Korean pressurized water reactors (PWRs) under dry storage conditions. Korean PWR fuel assemblies were categorized into four distinct types based on their configuration, facilitating the calculation of effective thermal conductivities and flow resistance coefficients. These parameters are crucial for simulating heat transfer and determining the peak cladding temperature (PCT), ensuring the thermal safety of stored nuclear fuel. The validation of the proposed porous model against explicit two-dimensional and three-dimensional simulations demonstrated its efficacy and reliability in enhancing the thermal analysis of spent fuel assemblies, highlighting the significance of accurately calculating the porous model parameters in the safety assessment of nuclear fuel storage. Furthermore, the study assessed the sensitivity of variables influencing temperature during spent nuclear fuel storage, focusing on flow resistance coefficients, control rod effect, and basket size. The findings revealed that variations in flow resistance and the presence of control rods minimally impacted PCT, whereas basket size significantly influenced temperature, underscoring its importance in the thermal analysis of nuclear fuel storage systems.</div></div>","PeriodicalId":19272,"journal":{"name":"Nuclear Engineering and Technology","volume":"57 2","pages":"Article 103211"},"PeriodicalIF":2.6,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143099601","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

Analysis of Naturally Occurring Radioactive Material (NORM) in shifting earth layers in Piyungan, Bantul

IF 2.6 3区工程技术

Nuclear Engineering and Technology Pub Date : 2025-02-01 DOI: 10.1016/j.net.2024.08.055

Iqbal Nurrahim , Andang Widi Harto , Yohannes Sardjono , Isman Mulyadi Triatmoko , Zuhdi Ismail , Gede Sutresna Wijaya

引用次数: 0

Differentiated influences of perceived benefit types of nuclear power on its acceptance: Evidence from South Korea

IF 2.6 3区工程技术

Nuclear Engineering and Technology Pub Date : 2025-02-01 DOI: 10.1016/j.net.2024.09.017

Jin Won Lee , Hailin Zhang , Seungkook Roh

{"title":"Differentiated influences of perceived benefit types of nuclear power on its acceptance: Evidence from South Korea","authors":"Jin Won Lee , Hailin Zhang , Seungkook Roh","doi":"10.1016/j.net.2024.09.017","DOIUrl":"10.1016/j.net.2024.09.017","url":null,"abstract":"<div><div>Perceived benefits and risk of nuclear power have received considerable attention as influencing factors in public acceptance of nuclear power. The validation of the differential effects of these perceptions across contexts can provide implications for public communication strategies. This study is based on the similarity and dissimilarity between nuclear benefits and risk in their consequences. It posits that the pattern of the effect of environmental benefit perception on nuclear power acceptance is more similar to that of risk perception than to that of energy supply benefit perception, which is another type of benefit perception. Upon analyzing a national survey data from South Korea, we discovered the following: (1) regarding nuclear power as a non-dispreferred option, all the benefit perceptions and the risk perception exhibited a significant effect; (2) however, regarding nuclear power as the favorite option, the perception of environmental benefit and that of risk demonstrated a significant effect, but that of energy supply benefit did not. These findings have implications for both public communication strategies and theoretical considerations in future studies.</div></div>","PeriodicalId":19272,"journal":{"name":"Nuclear Engineering and Technology","volume":"57 2","pages":"Article 103214"},"PeriodicalIF":2.6,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143099940","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 simplified treatment methods for removal of Ra-226 and Ra-228 from sludge waste produced in natural gas processing plants

IF 2.6 3区工程技术

Nuclear Engineering and Technology Pub Date : 2025-02-01 DOI: 10.1016/j.net.2024.08.044

Ayman M. Sharaf , M.A. El-Nahal , Islam M. Nabil , I.H. Saleh , Mohamed Elsafi

{"title":"Development of simplified treatment methods for removal of Ra-226 and Ra-228 from sludge waste produced in natural gas processing plants","authors":"Ayman M. Sharaf , M.A. El-Nahal , Islam M. Nabil , I.H. Saleh , Mohamed Elsafi","doi":"10.1016/j.net.2024.08.044","DOIUrl":"10.1016/j.net.2024.08.044","url":null,"abstract":"<div><div>The present study aims to establish a new treatment method for removing or reducing the concentration of <sup>226</sup>Ra and <sup>228</sup>Ra in sludge waste produced due to natural gas production at natural gas processing Plants. The main radionuclides present in sludge waste of natural gas processing are Radium and its daughters due to their low solubility in the water they can form compounds with sulfate ions, carbonate ions, silicate ions, then precipitation scale or sludge. The suggested method is designed to be simple, applicable, economically beneficial, and environmentally safe, by using internal available resources like emitted hydrogen sulfide and sodium hydroxide, also reduction of chemicals that used in radioactivity treatment to be sulfuric acid or sodium hydroxide instead of multiple different chemicals that used in other treatment procedures. The effects of the used chemical reagents sulfuric acid and sodium hydroxide in various concentrations at different reaction temperatures on the sludge waste to extract the radium isotopes have been studied, evaluated, and compared. The study proved that removing radium isotopes is increased by elevating the reagents concentration and sludge temperature. The removal effects of the used reagents are approximately similar.</div></div>","PeriodicalId":19272,"journal":{"name":"Nuclear Engineering and Technology","volume":"57 2","pages":"Article 103175"},"PeriodicalIF":2.6,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143099941","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