检索结果-南通市图书馆

Analysis of burnup performance and temperature coefficient for a small modular molten‑salt reactor started with plutonium

引用

Nuclear science and Techniques 2023年第1期34卷 178-189页

作者： Xue‑Chao Zhao Yang Zou Rui Yan Xiang‑Zhou Cai Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201800China CAS Innovative Academies in TMSR Energy System Chinese Academy of SciencesShanghai 201800China University of chinese academy of sciences Chinese Academy of SciencesBeijing 100049China

In a thorium-based molten salt reactor(TMSR),it is difficult to achieve the pure 232Th–^(233)U fuel cycle without sufficient^(233)U fuel ***,the original molten salt reactor was designed to use enriched uranium or plutonium as the starting *** exploiting plutonium as the starting fuel and thorium as the fertile fuel,the high-purity^(233)U produced can be separated from the spent fuel by fluorination ***,the molten salt reactor started with plutonium can be designed as a^(233)U breeder with the burning plutonium extracted from a pressurized water reactor(PWR).Combining these advantages,the study of the physical properties of plutonium-activated salt reactors is *** study mainly focused on the burnup performance and temperature reactivity coefficient of a small modular molten-salt reactor started with plutonium(SM-MSR-Pu).The neutron spectra,^(233)U production,plutonium incineration,minor actinide(MA)residues,and temperature reactivity coefficients for different fuel salt volume fractions(VF)and hexagon pitch(P)sizes were calculated to analyze the burnup behavior in the *** on the comparative analysis results of the burn-up calculation,a lower VF and larger P size are more beneficial for improving the burnup ***,from a passive safety perspective,a higher fuel volume fraction and smaller hexagon pitch size are necessary to achieve a deep negative feedback ***,an excellent burnup performance and a deep negative temperature feedback coefficient are incompatible,and the optimal design range is relatively narrow in the optimized design of an *** a comprehensive consideration,P=20 cm and VF=20%are considered to be relatively balanced design *** on the fuel off-line batching scheme,a 250 MWth SM-MSR-Pu can produce approximately 29.83 kg of ^(233)U,incinerate 98.29 kg of plutonium,and accumulate 14.70 kg of MAs per year,and the temperature reactivity coefficie

关键词： Molten salt fuel Incinerate plutonium 233U production Temperature reactivity coefficient

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Plutonium utilization in a small modular molten-salt reactor based on a batch fuel reprocessing scheme

引用

Nuclear science and Techniques 2024年第4期35卷 15-28页

作者： Xue-Chao Zhao Rui Yan Gui-Feng Zhu Ya-Fen Liu Jian Guo Xiang-Zhou Cai Yang Zou Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201800China CAS Innovative Academies in TMSR Energy System Chinese Academy of SciencesShanghai 201800China University of chinese academy of sciences Beijing 100049China

A molten salt reactor(MSR)has outstanding features considering the application of thorium fuel,inherent safety,sustainability,and resistance to ***,fissile material^(233)U is significantly rare at the current stage,thus it is difficult for MSR to achieve a pure thorium-uranium fuel ***,using plutonium or enriched uranium as the initial fuel for MSR is more *** this study,we aim to verify the feasibility of a small modular MSR that utilizes plutonium as the starting fuel(SM-MSR-Pu),and highlight its advantages and ***,the structural design and fuel management scheme of the SM-MSR-Pu were ***,the neutronic characteristics,such as the graphite-irradiation lifetime,burn-up performance,and coefficient of temperature reactivity were calculated to analyze the physical characteristics of the *** results indicate that plutonium is a feasible and advantageous starting fuel for a SM-MSR;however,there are certain shortcomings that need to be *** a 250 MWth SM-MSR-Pu,approximately 288.64 kg^(233)U of plutonium with a purity of greater than 90% is produced while 978.00 kg is burned every ten *** temperature reactivity coefficient decreases from -4.0 to -6.5 pcm K^(-1) over the 50-year operating time,which ensures a long-term safe ***,the amount of plutonium and accumulation of minor actinides(MAs)would increase as the burn-up time increases,and the annual production and purity of^(233)U will *** achieve an optimal burn-up performance,setting the entire operation time to 30 years is ***,more than 3600 kg of plutonium eventually accumulate in the *** research is required to effectively utilize this accumulated plutonium.

关键词： Molten salt fuel Plutonium utilization ^(233)U TRUs mole fraction Temperature feedback coefficient

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Discovery and intensity characterization of TDP and PRP based on temperature evolution history during the pyrolysis for large biomass particle

引用

Carbon Resources Conversion 2024年第3期7卷 41-50页

作者： Rui Chen Jun Cai Xinli Li Xiaobin Qi State Key Laboratory of Coal Conversion Institute of Engineering ThermophysicsChinese Academy of SciencesBeijing 100190China University of chinese academy of sciences No.19 Yuquan RoadShijingshan DistrictBeijing 100049China Shanxi Engineering research Center of Coal Clean Efficient Combustion and GasificationNo.1619 Yunzhou StreetDatong CityShanxi Province 037305China Shanxi Key Laboratory of Coal Flexible Combustion and Thermal Conversion No.1619 Yunzhou StreetDatong CityShanxi Province 037305China

The pyrolysis behaviors and temperature evolution history of lignocellulosic biomass(Beech,BH)were characterized using a novel pyrolysis *** simulation results were validated through corresponding experimental *** on the simulation results,two distinct peaks were observed in the temperature difference between the surface and center(TDSC)curve,namely the thermal disturbance peak(TDP)and the pyrolysis reaction peak(PRP).The presence of TDP and PRP was confirmed by examining the heat flux ratio between the pyrolysis rate and the temperature rise ***,the results indicated that three factors,namely heating temperature,particle size,and pyrolysis rate,influenced the relative intensity between TDP and *** changing the values of each impact factor,conditions where TDP owns the same height with PRP were obtained under different working *** findings have led to the development of a dimensionless number,naming the pyrolysis-heating surface-center number(PHSC number).This number could provide a comprehensive indication of the collective impact of the aforementioned factors when TDP and PRP exhibit equal peak heights.

关键词： DAEM Large biomass particle Pyrolysis Temperature distribution Dimensionless number

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Development of 400-μW cryogen-free dilution refrigerators for quantum experiments

引用

chinese Physics B 2024年第7期33卷 28-35页

作者：关翔樊洁边勇波程智刚姬忠庆 Institute of Physics Chinese Academy of SciencesBeijing 100190China School of Physical sciences University of Chinese Academy of SciencesBeijing 100190China

We have successfully developed cryogen-free dilution refrigerators with medium cooling power that can be applied to quantum experiments. Breakthroughs have been made in some key technologies and components of heat switches and dilution units. Our prototype has been running continuously and stably for more than 100 hours below 10 m K, with a minimum temperature of 7.6 m K and a cooling power of 450 μW at 100 m K. At the same time, we have also made progress in the application of dilution refrigerators, such as quantum computing, low-temperature detector, and magnet integration. These indicators and test results indicate good prospects for application in physics, astronomy, and quantum information.

关键词： cryogen-free dilution refrigerator quantum computing low-temperature detector superconducting magnet

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Enhancing sensitivity of microbial fuel cell sensors for low concentration biodegradable organic matter detection:Regulation of substrate concentration,anode area and external resistance

引用

Journal of Environmental sciences 2021年第3期33卷 227-235页

作者： Yangyang Gao Sha Wang Fengjun Yin Pin Hu Xingzu Wang Yuan Liu Hong Liu Key Laboratory of Reservoir Aquatic Environment Chinese Academy of SciencesChongqing 400714China Chongqing Institute of Green and Intelligent Technology Chinese Academy of SciencesChongqing 400714China University of chinese academy of sciences Beijing100049China

The relatively low sensitivity is an important reason for restricting the microbial fuel cell(MFC)sensors'application in low concentration biodegradable organic matter(BOM)*** startup parameters,including substrate concentration,anode area and external resistance,were regulated to enhance the sensitivity of MFC *** results demonstrated that both the substrate concentration and anode area were positively correlated with the sensitivity of MFC sensors,and an external resistance of 210Ωwas found to be optimal in terms of sensitivity of MFC *** MFC sensors had lower detection limit(1 mg/L)and higher sensitivity(Slope value of the linear regression curve was 1.02),which effectively overcome the limitation of low concentration BOM *** essential reason is that optimized MFC sensors had higher coulombic efficiency,which was beneficial to improve the sensitivity of MFC *** main impact of the substrate concentration and anode area was to regulate the proportion between electrogens and nonelectrogens,biomass and living cells of the anode *** external resistance mainly affected the morphology structure and the proportion of living cells of the *** study demonstrated an effective way to improve the sensitivity of MFC sensors for low concentration BOM detection.

关键词： Microbial fuel cell sensor High sensitivity Biodegradable organic matter Substrate concentration Anode area External resistance

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

SARS-CoV-2 membrane glycoprotein M antagonizes the MAVS-mediated innate antiviral response

引用

Cellular & Molecular Immunology 2021年第3期18卷 613-620页

作者： Yu-Zhi Fu Su-Yun Wang Zhou-Qin Zheng Yi Huang Wei-Wei Li Zhi-Sheng Xu Yan-Yi Wang Key Laboratory of special Pathogens and Biosafety Center for Biosafety Mega-ScienceWuhan Institute of VirologyChinese Academy of Sciences430071 WuhanChina University of chinese academy of sciences 100049 BdjingChina

A novel SARS-related coronavirus(SARS-CoV-2)has recently emerged as a serious pathogen that causes high morbidity and substantial ***,the mechanisms by which SARS-CoV-2 evades host immunity remain poorly ***,we identified SARS-CoV-2 membrane glycoprotein M as a negative regulator of the innate immune *** found that the M protein interacted with the central adaptor protein MAVS in the innate immune response *** interaction impaired MAVS aggregation and its recruitment of downstream TRAF3,TBK1,and IRF3,leading to attenuation of the innate antiviral *** findings reveal a mechanism by which SARS-CoV-2 evades the innate immune response and suggest that the M protein of SARSCoV-2 is a potential target for the development of SARS-CoV-2 interventions.

关键词： SARS-CoV-2 Membrane glycoprotein M MAVS TypeⅠinterferon Innate immunity

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Electrical and thermal conductivity of Earth's core and its thermal evolution——A review

引用

Acta Geochimica 2022年第4期41卷 665-688页

作者： Yuan Yin Qingwen Zhang Youjun Zhang Shuangmeng Zhai Yun Liu State Key Laboratory of Ore Deposit Geochemistry Institute of GeochemistryChinese Academy of SciencesGuiyang550081China International research Center for Planetary science College of Earth SciencesChengdu University of TechnologyChengdu610059China Institute of Atomic and Molecular Physics Sichuan UniversityChengdu610065China Key Laboratory of High-Temperature and High-Pressure Study of the Earth’s Interior Institute of GeochemistryChinese Academy of SciencesGuiyang550081China

The Earth’s core is composed of iron,nickel,and a small amount of light elements(e.g.,Si,S,O,C,N,H and P).The thermal conductivities of these components dominate the adiabatic heat flow in the core,which is highly correlated to *** we review a large number of studies on the electrical and thermal conductivity of iron and iron alloys and discuss their implications on the thermal evolution of the Earth’s *** summary,we suggest that the Wiedemann-Franz law,commonly used to convert the electrical resistivity to thermal conductivity for metals and alloys,should be cautiously applied under extremely high pressure-temperature(P-T)conditions(e.g.,Earth’s core)because the Lorentz number may be P-T *** date,the discrepancy in the thermal conductivity of iron and iron alloys remains between those from the resistivity measurements and the thermal diffusivity modeling,where the former is systematically *** studies reconcile the electrical resistivity by first-principles calculation and direct measurements,and this is a good start in resolving this *** to an overall higher thermal conductivity than previously thought,the inner core age is presently constrained at~1.0 ***,light elements in the core would likely lower the thermal conductivity and prolong the crystallization of the inner ***,whether thermal convection can power the dynamo before the inner core formation depends on the amounts of the proper light elements in the *** works are needed to establish the thermal evolution model of the core.

关键词： Earth’s core Electrical and thermal conductivity Iron and its alloys Thermal evolution Geodynamo

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Photoelectric-driven conductive composite ionogel patch for effective wound healing

引用

escience 2024年第2期4卷 92-100页

作者： Xingkai Ju Jiao Kong Guohua Qi Shuping Hou Bo Wang Xingkang Diao Shaojun Dong Yongdong Jin State Key Laboratory of Electroanalytical Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China School of Applied Chemistry and Engineering University of Science and Technology of ChinaHefei 230026China Guangdong Key Laboratory of Biomedical Measurements and Ultrasound Imaging School of Biomedical EngineeringShenzhen University Medical SchoolShenzhen UniversityShenzhen 518060China

Developing the high biosafety,effective and wearable devices for fast wound healing is highly desired but remains a ***,we propose a“win–win co-operation”strategy to potentiate effective skin wound healing at the wound site by constructing robust and ecofriendly composite patch under opto-electric *** wearable patch is composed of ionic gel doped with Ti3C2Tx(MXene),which possesses good photothermal response to kill the bacteria via effective inhibition of the expression of inflammatory factors,preventing wound ***,the composite ionogel patch is capable of providing green and on-demand electrical stimulation for wound site,guiding cell migration and proliferation by improved bioenergy and expression up-regulation of growth *** mice wound models,the treatment group healed~31%more ***,the wearable devices could enable visual and real-time supervising treatment effect due to their good *** proposed strategy would be promising for future clinical treatment of wound healing.

关键词： Wound healing Wearable composite ionogel patch Antibacteria Electrical stimulation Cell migration and proliferation

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Failure-analysis of carbon nanotubes and their extreme applications

引用

Nano research 2023年第11期16卷 12364-12383页

作者： Mingquan Zhu Yunxiang Bai Runyi Gao Yajing Liu Peng Zhang Hui Zhang Luqi Liu Zhong Zhang CAS Key Laboratory of Nanosystem and Hierarchical Fabrication CAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyChinese Academy of SciencesBeijing 100190China University of chinese academy of sciences Beijing 100049China CAS Key Laboratory of Mechanical Behavior and Design of Materials Department of Modern MechanicsUniversity of Science and Technology of ChinaHefei 230027China

The study of material failure is crucial for the design of engineering applications,as it can have significant social and economic *** nanotubes(CNTs),with their exceptional electrical,mechanical,and thermal properties,hold immense potential for a wide range of cutting-edge applications such as superstrong fiber,lightning strike protector,and even space *** review provides an overview of the advancement in understanding the mechanical and electrical failure study of CNTs and their assemblies,serving as a comprehensive reference for utilizing CNTs in various *** begin,we emphasize the importance of studying material failure and provide a brief introduction to ***,we explore the mechanical and electrical failure characteristics of CNTs and their assemblies,along with notable examples of applications that utilize their failure-resistant properties,such as flywheel energy storage and lightning strike ***,we present perspectives associated with analyzing CNT failure and its implications for extreme applications.

关键词： carbon nanotubes failure-analysis flywheel energy storage lightning strike protection

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Links between winter dust over the Tibetan Plateau and preceding autumn sea ice variability in the Barents and Kara Seas

引用

Advances in Climate Change research 2022年第6期13卷 896-908页

作者： Chao XU Jie-Hua MA Jian-Qi SUN Chao YOU Yao-Ming MA Hui-Jun WANG Tao WANG Climate Change research Centre Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China CMA Earth System Modeling and Prediction Centre(CEMC) China Meteorological AdministrationBeijing 100081China Nansen-Zhu International research Centre Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China Key Laboratory of Meteorological Disaster(KLME) Ministry of Education&Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters(CIC-FEMD)Nanjing University of Information Science&TechnologyNanjing 210044China College of Environment and Ecology Chongqing UniversityChongqing 400044China Land-Atmosphere Interaction and Its Climatic Effects Group State Key Laboratory of Tibetan Plateau Earth System and Resources Environment(TPESRE)Institute of Tibetan Plateau ResearchChinese Academy of SciencesBeijing 100101China College of Earth and Planetary sciences University of Chinese Academy of ScienceBeijing 100049China Center for Pan-third Pole Environment Lanzhou UniversityLanzhou 730000China

The Tibetan Plateau(TP)is characterized by heavily local dust activities,however,the mechanism of interannual variations of winter dust frequency over the TP remain poorly *** studies showed the autumn Arctic sea ice could significantly influence the winter climate over *** autumn sea ice affects winter dust activity over the TP or not?Here,we used an integrated surface database to investigate possible mechanisms for interannual variability in the frequency of winter dust events above the *** variability,which is thought to be mainly caused by local dust emissions,shows significant correlations with sea ice concentration(SIC)in the Barents and Kara Seas during the preceding *** Barents-Kara SIC is accompanied by reduced snow depth over northern Eurasia between autumn and winter,which can enhance the Eurasian mid-latitude westerly jet *** strengthening increases the cyclogenesis and occurrence of strong surface wind speeds in winter,especially over the *** addition,a lower SIC is closely associated with reduced precipitation and snow cover in late autumn and winter over the TP,which in turn enhances warming of the land surface and reduces the area of frozen *** anomalies in atmospheric circulation patterns and local surface conditions promote dust events above the TP during *** ensemble means of Atmospheric Model Intercomparison Project experiments from Phase 6 of the Coupled Model Inter-comparison Project and the Community Atmosphere Model version 4 can generally reproduce the atmospheric circulation anomalies associated with decreased Barents-Kara *** study reveals the crucial effect that SIC anomalies in the Barents and Kara Seas have on winter dust activities over the TP.

关键词： Winter dust frequency Tibetan Plateau Sea ice concentration Barents and Kara Seas Snow anomalies

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：