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Startup scheme optimization and flow instability of natural circulation lead-cooled fast reactor SNCLFR-100

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Nuclear Science and Techniques 2021年第11期32卷 191-200页

作者： Wen-Shun Duan Ze-ren zou Xiao Luo Hong-Li Chen School of Nuclear Science and Technology University of Science and Technology of ChinaHefei 230027China

Owing to the inherent instability of the natural circulation system,flow instability can easily occur during the operation of a natural circulation lead-cooled fast reactor,especially during the startup phase.A comprehensive startup scheme for SNCLFR-100,including primary and secondary circuits,is proposed in this *** references existing more mature startup schemes in various reactor *** additionally considers the restriction conditions on the power increase in other schemes and the characteristics of lead-based *** this basis,the multi-scale coupling code ATHLET-OpenFOAM was used to study the flow instability in the startup phase under different power-step amplitudes and power duration *** results showed that obvious flow instability phenomena were found in the different startup schemes,such as the short-term backflow phenomenon of the core at the initial time of the ***,an obvious increase in the flow rate and temperature to the peak value at the later stage of a continuous power rise was observed,as well as continuous oscillations before reaching a steady *** was determined that the scheme with smaller power-step amplitude and a longer power duration time requires more time to start the ***,it will be more conducive to the safe and stable startup of the reactor.

关键词： Natural circulation Lead-cooled fast reactor Startup scheme Flow instability Multi-scale coupling

Laboratory study and analysis of the instability of alongshore currents

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Acta Oceanologica Sinica 2009年第4期28卷 96-106页

作者： ren Chunping zou Zhili State Key Laboratory of Coastal and Offshore Engineering Dalian University of Technology Dalian 116024 China

A laboratory experiment on the instability of alongshore currents was conducted on a plane beach with slope 1：40. Low-frequency fluctuations of alongshore currents with the period of approximately 100 s were observed. The dominant frequency and amplitudes of the oscillations of alongshore currents were determined using the maximum entropy method and the regression method of trigonometric function. The variations across the beach cross-section of the oscillation amplitudes of the alongshore current were given. The linear shear instability theory was used to analyze the mechanism of the oscillation, and the calculated results agreed with measurements. This confirms that the observed fluctuation of alongshore currents is due to the shear instability of alongshore currents.

关键词： alongshore currents shear instability water waves coast

Cellulose nanofiber-derived carbon aerogel for advanced room-temperature sodium–sulfur batteries

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Carbon Energy 2023年第1期5卷 1-15页

作者： Wu Yang Wang Yang ren zou Yongfa Huang Haihong Lai Zehong Chen Xinwen Peng State Key Laboratory of Pulp and Paper Engineering South China University of TechnologyGuangzhouChina

Room-temperature sodium–sulfur(RT/Na–S)batteries are regarded as promising large-scale stationary energy storage systems owing to their high energy density and low cost as well as the earth-abundant reserves of sodium and ***,the diffusion of polysulfides and sluggish kinetics of conversion reactions are still major challenges for their ***,we developed a powerful and functional separator to inhibit the shuttle effect by coating a lightweight three-dimensional cellulose nanofiber-derived carbon aerogel on a glass fiber separator(denoted NSCA@GF).The hierarchical porous structures,favorable electronic conductivity,and three-dimensional interconnected network of N,S-codoped carbon aerogel endow a multifunctional separator with strong polysulfide anchoring capability and fast reaction kinetics of polysulfide conversion,which can act as the barrier layer and an expanded current collector to increase sulfur ***,the hetero-doped N/S sites are believed to strengthen polysulfide anchoring capability via chemisorption and accelerate the redox kinetics of polysulfide conversion,which is confirmed from experimental and theoretical *** a result,the assembled Na–S coin cells with the NSCA@GF separator showed a high reversible capacity(788.8 mAh g^(−1) at 0.1 C after 100 cycles)and superior cycling stability(only 0.059%capacity decay per cycle over 1000 cycles at 1 C),thereby demonstrating the significant potential for application in high-performance RT/Na–S batteries.

关键词： carbon aerogel cellulose nanofiber N,S codoping redox kinetics sodium–sulfur batteries

Development and application of a multi-physics and multi-scale coupling program for lead-cooled fast reactor

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Nuclear Science and Techniques 2022年第2期33卷 40-52页

作者： Xiao Luo Chi Wang Ze-ren zou Lian-Kai Cao Shuai Wang Zhao Chen Hong-Li Chen School of Nuclear Science and Technology University of Science and Technology of ChinaHefei 230026China China Nuclear Power Technology Research Institute Co.Ltd Shenzhen 518000China

In this study,a multi-physics and multi-scale coupling program,Fluent/KMC-sub/NDK,was developed based on the user-defined functions(UDF)of Fluent,in which the KMC-sub-code is a sub-channel thermal-hydraulic code and the NDK code is a neutron diffusion *** coupling program framework adopts the"master-slave"mode,in which Fluent is the master program while NDK and KMC-sub are coupled internally and compiled into the dynamic link library(DLL)as slave *** domain decomposition method was adopted,in which the reactor core was simulated by NDK and KMC-sub,while the rest of the primary loop was simulated using Fluent.A simulation of the reactor shutdown process of M2LFR-1000 was carried out using the coupling program,and the code-to-code verification was performed with ATHLET,demonstrating a good agreement,with absolute deviation was smaller than 0.2%.The results show an obvious thermal stratification phenomenon during the shutdown process,which occurs 10 s after shutdown,and the change in thermal stratification phenomena is also captured by the coupling *** the same time,the change in the neutron flux density distribution of the reactor was also obtained.

关键词： Multi-physics and multi-scale coupling method User-defined functions Dynamic link library Thermal stratification Lead-cooled fast reactor

NUMERICAL STUDY OF FLOW PAST AN AXISYMMETRIC BODY WITH A RING WING AT VARIOUS ATTACK ANGLES

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Journal of Hydrodynamics 2003年第5期15卷 49-53页

作者： ren An lu, zou Jian feng, Dai Zhi qian Department of Mechanics, Zhejiang University, 310027, China, Dept. of Mech. Zhejiang Univ. Zhejiang 310027 China

The laminar and turbulent flows past an axi-symmetric body with a ring wingwere investigated numerically at various attack angles (0°-20°) for the Reynolds numbers rangingfrom 10~3 to 10~7. The DDM (Domain Decomposition Method) with the Schwarz iterative method based onfinite difference approximation was applied to simulate this problem. The primitive variableformulation was used for the solution of the incompressible Navier-Stoke equations. The velocityfield was calculated from the unsteady momentum equation by marching in time. The continuityequation was replaced by a Poisson-type equation for the pressure with the Neumann boundaryconditions. The Baldwin-Lomax model was adopted to simulate turbulence effect. The leap frogimplicit iterative method was used for the time difference approximations. The computed pressure atthe front stagnation point is found to have a small deviation, less than 10%, from the theoreticalvalue. The outlet flux has a loss about 5%. The lift coefficients increase linearly with the attackangle, but for attack angles greater than 15° the lift coefficients show mild decrease. Thefriction drag coefficients are insensitive to the attack angles, but the pressure drag coefficientsincrease markedly with the attack angles. In addition, complex flow patterns are revealed within thevicinity of the ring wing.

关键词： an axisymmetric body domain decomposition method (DDM) baldwin-lomax model non-staggered grid

Animal experiments and clinical application of CT during percutaneous splenoportography

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World Journal of Gastroenterology 1998年第3期4卷 34-38页

作者： ZHANG Xue Lin, QIU Shi Jun, CHANG ren Min and zou Chang Jing

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ＡｎｉｍａｌｅｘｐｅｒｉｍｅｎｔｓａｎｄｃｌｉｎｉｃａｌａｐｐｌｉｃａｔｉｏｎｏｆＣＴｄｕｒｉｎｇｐｅｒｃｕｔａｎｅｏｕｓｓｐｌｅｎｏｐｏｒｔｏｇｒａｐｈｙＺＨＡＮＧＸｕｅＬｉｎ，ＱＩＵＳｈｉＪｕｎ，ＣＨＡＮＧＲｅｎＭｉｎａｎｄＺＯＵＣｈａｎｇ...

关键词： portography tomography,X-ray computed animals,laboratory liver neoplasms/radiography

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大体积混凝土裂缝控制方法的研究

西安科技学院学报 2001年第1期21卷 27-29,43页

作者：邹仁华西安科技学院建筑工程系陕西西安710054

通过分析大体积混凝土温度变化机理 ,对大体积混凝土的结构计算温差及温度应力计算给出了较简便的方法 ;并对温度监测、施工措施等方面进行了探讨。结合工程实例 ,介绍了某大体积混凝土工程的裂缝控制方法。

关键词：大体积混凝土温度应力裂缝控制

一种基于DirectX的WindowsXP环境下波形全屏快速滚动显示技术

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中国医疗器械杂志 2007年第4期31卷 267-270页

作者：邹人俊邹人钢江西省轻工业设计院江西南昌330002 南昌市青山湖区农业局

利用微软的DirectX技术,在PC机上Windows XP环境下实现了波形的高分辨率全屏快速滚动显示,在分辨率为1280×1024时速度最快可达1米/秒,波形滚动流畅不抖动。

关键词： DiretX WindowsXP 波形滚动

Experimental study of retinoic acid on improving iodide uptake in MCF-7 breast cancer cells

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Nuclear Science and Techniques 2005年第4期16卷 221-224页

作者： FU Hong-Liang WU Jing-Chuan DU Xue-Liang LI Jia-Ning WU Zhen zou ren-Jian Department of Nuclear Medicine Xinhua Hospital Shanghai Second Medical University Shanghai 200092

The study aims to investigate the effect of retinoic acid on the iodide uptake of MCF-7 cells and its mechanism. The iodide uptake and expression of hNIS(human sodium/iodide symporter)mRNA in the breast cancer MCF-7 cells were compared individually before and after the intervention of all-trans retinoic acid (ATRA) with the iodide uptake assay and RT-PCR. The following results are obtained: (1) when treated with all-trans retinoic acid in the concentration of 1.0 μmol/L, the capacity of iodide uptake of MCF-7 cells reached about 1.5 times of the basal state; (2) 12 h after the intervention of 1.0 μmol/L ATRA,the hNISmRNA expression of the MCF-7 cells reached maximum. The study shows that all-trans retinoic acid has the effect to improve the iodide uptake of the MCF-7 cells and this effect may result from its up-regulation of the hNISmRNA expression.

关键词： MCF-7 碘化物乳腺癌放射性疗法