Fuel coolant interaction experiments in TROI using a UO2/ZrO2 mixture

This paper discusses the results of steam explosion experiments using reactor material carried out under “Test for Real cOrium Interaction with water (TROI)” program. About 4–9 kg of corium melt jet is delivered into a sub-cooled water pool at atmospheric pressure. Spontaneous steam explosions are observed in four tests among six tests. The dynamic pressure, dynamic load, and morphology of debris clearly indicate the cases with steam explosion. The initial conditions and results of the experiments are discussed.     

压水堆一回路模拟腐蚀氧化物的溶解去污试验

本文介绍了对两种压水反应堆一回路模拟腐蚀氧化物（铁镍铬氧化物和铁镍氧化物）的溶解去污试验结果。选择的去污剂为0.3%草酸、0.1%柠檬酸和0.1%高锰酸钾。结果表明，实验温度为95℃、去污时间在6－48h范围内，0.3%草酸对铁镍铬氧化物和铁镍氧化物的溶解率分别为24.1%-65.3%和4.9%-64.4%；0.1%柠檬酸对二者的溶解率分别为2.2%-4.4%和0.37%-1.55%；0.1%高锰酸钾对二者几乎没有溶解作用。采用在草酸或柠檬酸去污前使用高锰酸钾去污剂的二步去污法，对两种氧化物的溶解度小于单独使用草酸或柠檬酸去污的一步法。     

用NaI(Tl)探测器测量γ辐射场剂量特性的加权积分法研究

辐射场剂量特性的测量可以通过剂量率仪或谱 剂量转换的方法来实现。其中一种谱 剂量转换的方法是通过一个G(E)函数 ,把测得的结果直接换算成剂量而不需解谱。本文采用这种方法 ,对一个75mm× 75mm的NaI(Tl)探测器的能谱特性进行测量与分析 ,算出了该晶体的G(E)函数值及估计的误差 ,并用此方法与高气压电离室作了比对测量     

反应堆堆芯热功率测量方法及其误差分析

通过建立精确的数学模型 ,提出了一种测量核电站压水反应堆堆芯热功率的方法 ,并对该方法进行了误差分析。基于上述方法的KME系统与校验SAPEC系统的比较结果表明 ,该方法完全可以用于核电站堆芯热功率的测量     

Modification of Boundary Parameters and Fluctuations by IBW and LHCD in the HT-7 Tokamak

Measurements of boundary parameters and their fluctuations have been performed in ohmic (OH) plasma and Ion Bernstein Wave (IBW) and Lower Hybrid Current Drive (LHCD) enhanced confinement plasma using a pneumatically driven Langmuir probe array on HT-7 toka-maX. In the enhanced confinement plasma~ the gradients of electron density and temperature become higher and a transport barrier comes into being in the vicinity of the limiter. The boundary potential shows a clear modification in the same region. The fluctuation levels are significantly depressed and the coherences between fluctuations are reduced evidently in the enhanced plasma.Meanwhile, we obtained the spectral features and the poloidal phase velocity of fluctuations us-ing a two-point correlation technique and found obvious modifications of the turbulence and the poloidal flow. The results suggest that the improved confinement in the IBW and LHCD enhanced plasma is at least partially due to the modification of the boundary parameters and the suppression of the boundary fluctuations and fluctuation induced fluxes.     

受限语言子集的理论研究和探索

本文在综述受限语言研究成果的基础上,提出受限语言子集的一种形式化描述模型,并给出其相应的语言特性和数学特性,就受限汉语子集的确定方法问题进行了理论研究和探索。作者希望本文提出的表示模型和确定方法能够引起有关的讨论,并在充分认识受限语言研究的必要性和困难的基础上,将其引向全面深入的发展。     

最小阶时分滤波器及其在运载体对准中的应用

设计一种时分降低滤波器用来进行运载体惯导系统的动态对准和传递对准，假定运载体惯导系统已标定的。在运载体水平直线运动的短时间内，两个二阶滤波以时分工作方式估计平台水平失调角，在消除水平失调角后，运载体在垂直与当地垂线的水平面内机动，此时用一个三阶（或四阶）滤波器来估计方位失调角，另外，在本文中给出该滤波器的数据压缩算法，来提高估计精度。     

在 AUTO CAD 中实现零件轮廓数控自动编程

介绍了在ＡＵＴＯＣＡＤ系统中用ＡＵＴＯＬＩＳＰ语言对图形实现数控铣自动编程的方法，实现图形交互式数控机床自动编程。     

Effect of AlP master alloy on grain refinement of primary silicon in eutectic Al-Si alloys

To obtain the finer primary silicon crystals, the proprietary Al-P master alloy was adopted to modify the eutectic Al-Si alloys and the most suitable modification process was made in the experiments. The SEM (Scanning Electron Microscope) and DSC (Differential Scanning Calorimeter) analysis indicate that the Al-P modifier has more advantages over Cu-P and Fe-P modifier in easily addition, no elemental alteration and less undercooling of primary silicon′s solidification, which suggests the Al-P master alloy is an effective modifier of eutectic Al-Si alloys.