原油大罐液位及剖面含水量测量系统研究

提出了油水混合液中求解原油（体积）含量的数理方程;设计并研制了一套硬、软件测量系统。实测结果表明,测量系统安全、可靠、快速,其结果与具有定性、定量的取样化验结果相一致。     

原油大罐液闰及剖面含水量测量系统研究

提出了油水混合液中求解原油（体积）含量的数量方程;设计并研制了一套硬、软件测量系统。实测结果表明,测量系统安全、可靠、快速,其结果与具有定性、定量的取样化验结果相一致。     

铠装铂电阻液位测量传感器研究

压力容器内的水位是反应堆运行中的重要参数．基于发热体在液相和汽相介质中放热系数的显著差异．本文提出了一种由铠装铂电阻组成的液位测量传感器,并给出了理论分析结果和0．1～3．0MPa压力范围内的试验结果。结果表明,该传感器原理正确．结构可行．性能可靠。     

CSNS束流剖面测量系统前端模拟电路设计

剖面测量系统是强流质子加速器低能量直线段的关键束流诊断系统之一,开展束流剖面研究对直线加速器调试非常重要,其中前端模拟电路设计是该研究工作的核心内容。本文介绍了中国散裂中子源(CSNS)束流剖面测量系统前端模拟电路的功能设计、指标测试、工程应用。本前端模拟电路同样适用于CSNS的发射度测量,本电路已经在CSNS离子源发射度测试中使用,通过发射度测试、束流剖面测量证明了该电路完全满足了系统的要求。     

图像处理束流剖面测量系统设计

为实现束流截面数据的自动化获取,本文针对兰州重离子应用装置束流剖面监测系统进行改造。编写了基于Windows平台的视频数据获取与解码程序,设计了基于图像处理的光斑识别流程,并用OpenCV计算机视觉库进行实现,以便程序自动完成束流相关数据的计算。新系统运行稳定可靠,束流光斑识别精确度高,束流截面数据计算准确、快捷,解决了原系统不能实时分析束流光斑的问题,提高了调束效率。     

基于分区密度补偿的稳压器液位测量研究

针对稳压器底部电热元件进行加热时,稳压器中上部和底部温度差异较大,导致传统稳压器差压法液位存在测量误差大的问题,提出了一种基于分区密度补偿的稳压器液测量方法。首先根据实际情况将稳压器分为饱和区和非饱和区,饱和区为饱和蒸汽所在区域,利用测量得到的温度对饱和蒸汽密度进行补偿;非饱和区域为介质水所在的区域,利用非饱和区域平均温度对介质水密度进行补偿。其次在稳压器饱和区和非饱和区,建立基于最小二乘法的多项式拟合模型,进行密度变量补偿,进而结合冷水段密度量进行液位计算。最后在实验装置上进行实验,并和基准液位进行比较,实验表明本文所提出的稳压器液位测量方法能够得到可靠的测量结果,因此本方法能够广泛应用于核工业等工业领域中压力容器液位测量。      

核燃料循环工厂液位的声学测量

【英国《国际核工程》1986年10月号第56页报道】在涉及核燃料生产和后处理的化工厂的许多操作中,液位的控制是很重要的。由于γ辐照等原因,人们非常希望得到能将传感器放在生物屏蔽层外面,远离放射性工艺液流的液位探测器。为此,英国发展了一种很简单的声学测量装置,该装置已投入商业生产。该装置的工作原理如下:把一根回声管     

中国先进研究堆堆水池窄量程液位测量方案选择及误差分析

介绍了中国先进研究堆（CARR）水池窄量程液位测量的4种方案：远传隔离法兰差压法、安全级吹气法、绝压变送器测量法、差压变送器测量法，并对这4种测量方案进行比较、分析，最后对选定的测量方案进行了误差分析。结果表明：差压变送器测量法满足测量要求。     

GEANT4 simulation of water volume fraction measurement in dehydrated crude oil

Online measurement of water volume fraction (WVF) in dehydrated crude oil is a difficult task due to very little water in dehydrated crude oil and high precision requirements. We presents a method to measure water volume fraction in dehydrated crude oil with γ-ray densitometry. The Monte Carlo computer simulation packet GEANT4 was used to analyze the WVF measuring sensitivity of the γ-ray densitometry at different γ-ray energies, and effects of temperature, pressure, salinity and oil components on WVF measurement. The results show that the γ-ray densitome-try has high sensitivity in γ-ray energy ranges of 16～25 keV, and it can distinguish WVF changes of 0.0005. The calculated WVF decreases about 0.0002 with 1 ℃ of temperature increase and they have approximately linear relation with temperature when water volume fraction remains the same. Effects of pressure, salinity and oil components on water volume fraction can be neglected. Experiments were done to analyze sensitivity of the γ-ray densitometry. The results, as compared with simulations, demonstrate that simulation method is reliable and it is feasible to gauge low water volume fraction using low energy γ-rays.     

水底沉积物原位X射线荧光测量中水分的影响与校正

论述了水底(海底、湖底或水系)沉积物中含水量的变化对原位X射线荧光测量的影响,以源初级X射线在沉积物上的相干散射线和非相干散射射线强度为内标建立的散射校正方程,可有效地克服沉积物中含水量变化对目标元素特征X射线的干扰。实验结果表明,对铜矿远景区土壤样品,当样品中含水量变化为20％时,目标元素(Fe：10．9％;Cu：300mg／kg;Zn：124mg/kg)特征X射线强度的变化小于5％。     

双能γ射线透射法测原油含水含气的分析与计量系统

介绍了利用射线辐射衰减方法实现的原油含水率,含气率在线分析与计量系统。它采用双能γ放射源和闪烁探测器,用计算机获取探测到的γ射线穿过油的透射计数,并由此 计算出油、水、气的体积百分数,除此之外,该系统还能监测温度、压力和流量,从而得出产液量,产油量、产水量和产气量。     

CFD analysis for thermal mixing in a subcooled water tank under a high steam mass flux discharge condition

A Computational Fluid Dynamics (CFD) analysis for a thermal mixing test was performed for 30 s to develop the methodology for a numerical analysis of the thermal mixing between steam and subcooled water and to apply it to Advanced Power Reactor 1400 MWe (APR1400). In the CFD analysis, the steam condensation phenomenon by a direct contact was simulated by the so-called condensation region model. Thermal mixing phenomenon in the subcooled water tank was treated as an incompressible flow, a free surface flow between the air and the water, and a turbulent flow, which are implemented in the CFX4.4. The comparison of the CFD results with the test data showed a good agreement as a whole, but a small local temperature difference was found at some locations. A sensitivity analysis was performed to find the reason of the temperature difference. The commercial CFD code of CFX4.4 together with the condensation region model can simulate the thermal mixing behavior reasonably well when a sufficient number of mesh distributions and a proper numerical method are selected.     

应用回旋加速器测量水中微量氚

用超灵敏质谱法测量了京郊玉泉山水的氚含量。水样品经电解浓集并电解成气体后送入回旋加速器离子源,水中氚经加速到高能量(10MeV)后,用△E-E粒子望远镜鉴别和记录。 测量是相对一个已知氚含量的样品进行的,结果为50个氚单位,与用β衰变法的测量结果一致。     

CFD analysis of a turbulent jet behavior induced by a steam jet discharge through a single hole in a subcooled water tank

A computational fluid dynamics (CFD) analysis for a turbulent jet flow induced by a steam jet discharged into a subcooled water pool was performed for 10 s of transients to investigate whether the currently available CFD codes can be suitably used as a tool to investigate the applicability of the existing semi-analytical correlations to a condensing jet-induced turbulent jet and to analyze the thermal-hydraulic behavior, such as global circulation and local hot spot, in a condensation pool for advanced light water reactors. As for the numerical experiment, a series of sensitivity calculations was conducted systematically to elucidate the major factors which can cause different analysis results by varying the mesh distributions, numerical models for a convection term and an eddy viscosity term. The effect of a difference in the velocity and the temperature distribution in a region between the sparger and the pool wall has not been observed in the afore-mentioned sensitivity calculations. The comparison of the CFD results with the test data shows that the CFD analysis does not accurately simulate the local phenomenon of a turbulent jet existing downstream of a steam jet. It was found that the value of the turbulent intensity at the inlet of the turbulent jet region is the most important factor because it can determine the boundary of a turbulent jet through a momentum diffusion process in a radial direction. The comparison of the CFD results with the test data shows that the CFD analysis can accurately simulate the local phenomenon of a turbulent jet existing downstream of a steam jet only when the CFD analysis reflects the physics of a turbulent jet.     

A note on the optimization of parameters for the design of a poison-tube tank

Computational analysis is carried out to arrive at the optimal parameters for the safe and economic design of a poison-tube tank for the storage of fissile solution. The parameters studied are tube diameter, gap between tubes, packed density of the neutron poison (Boron carbide) and wall thickness of the tubes. The aim is to maximize the fissile solution volume satisfying the safety criteria for criticality. Finding the precise values of optimal parameters is a very difficult task. Here a practical way of finding the optimal parameters subject to the design constraints is indicated.