Design of Control Server Application Software for Neutral Beam Injection System

For the remote control of a neutral beam injection （NBI） system, a software NBIcsw is developed to work on the control server. It can meet the requirements of data transmission and operation-control between the NBI measurement and control layer （MCL） and the remote monitoring layer （RML）. The NBIcsw runs on a Linux system, developed with client/server （C/S） mode and multithreading technology. It is shown through application that the software is with good efficiency.     

Development of a Data Acquisition Control System for the First NBI on EAST

Neutral beam injection （NBI） heating is one of the most efficient auxiliary plasma heating methods for fusion devices. The data acquisition control system （DACS） with PXI （pe- ripheral component interconnect extensions for instrumentation） data acquisition card for the first NBI system in the experimental advanced superconducting tokamak （EAST） is presented in this paper. As an important sub-system, DACS is designed to obtain physical measurement signals in the EAST NBI system and to deal and store these data with the Lempel-Ziv-Oberhumer （LZO） lossless data compression algorithm, as well as offer convenient data call-back and access inter- faces to the user for examining and analyzing the data. Experimental results show that accurate data will ensure that researchers correctly analyze it and then properly adjust the experimental parameters or operation, so DACS should take a large step in improving experimental efficiency. Tile hardware and software sections are briefly presented in this paper, and now this system has been tested to be able to work reliably and steadily.     

B4C/Na/S.S.三元体系化学相容性研究Ⅱ.相容时间及钠中氧含量的影响

将快堆控制棒模拟样品置于高温热对流钠回路中 ,于 550℃下进行B4 C/Na/S .S .三元体系化学相容性试验 ,研究相容时间及钠中氧含量对相互作用特性的影响。结果表明 :试验后的B4 C芯块完整 ,无掉角、龟裂或破碎 ;包壳管内表面渗B ,渗B量与相容时间的平方根成正比 ,渗B深度不随相容时间变化 ;包壳管内表面显微硬度明显升高 ,其升高幅度随相容时间增长略有增大 ,不同相容时间下的硬化层深度均约为 4 0 μm ;相容时间从 80d增加到 4 0 0d ,包壳管内表面相继出现反应产物Cr2 B ,Na4 B10 O17,B6Fe2 3,CrB和NiB ,NiB12 ;B向包壳管内表面的扩散与温度、相容时间及钠中氧含量有关 ,氧对B的扩散起促进作用。     

基于uClinux的嵌入式数据采集系统

介绍了一种基于uClinux的嵌入式数据采集系统,系统以ARM7TDMI类型的微处理器S3C4510B为核心.系统实现了高速数据采集和10/100M以太网的数据传输,可以很好地取代传统的基于8位处理器的数据采集.     

ASP技术在加速器控制中的应用探索

详细讲述了ASP技术在加速器系统中的应用方法和过程,介绍了控制系统软件结构的发展趋势、ASP技术的原理,利用ASP技术访问WEB数据库的方式,并讨论了ASP技术应用于加速器控制的前景。     

田湾核电站堆芯装换料管理子系统设计

田湾核电站机组堆芯采用堆内倒换换料技术,装换料管理子系统是燃料管理系统的子系统之一,它以直观的图形操作方式协助管理人员完成核燃料堆芯装卸料的步序设计和优化工作.该子系统为纯B/S结构,采用ASP.NET平台、矢量绘图、暗通道提交、图片缓存等技术.本文介绍了该子系统的设计思路,重点阐述了图形交互技术的实现方法.     

Design of Timing Synchronization Software on EAST-NBI

To ensure the uniqueness and recognition of data and make it easy to analyze and process the data of all subsystems of the neutral beam injector （NBI）, it is required that all subsystems have a unified system time. In this paper, the timing synchronization software is presented which is related to many kinds of technologies, such as shared memory, multithreading, TCP protocol and so on. Shared memory helps the server save the information of clients and system time, multithreading can deal with different clients with different threads, the server works under Linux operating system, the client works under Linux operating system and Windows operating system. With the help of this design, synchronization of all subsystems can be achieved in less than one second, and this accuracy is enough for the NBI system and the reliability of data is thus ensured.     

Modelling of thermally enhanced erosion of beryllium

This paper presents two concurring models for the thermally enhanced erosion of metals. The modelling particularly deals with the erosion of beryllium by a helium plasma as an example system. Molecular dynamics (MD) simulations are used to reduce the number of free parameters in the models. A model of sublimation of ad-atoms created during ion impact was earlier proposed as an explanation of thermally enhanced erosion. Using MD calculations the parameter space for this model was reduced to a single free parameter, the areal surface defect density δ_Def. Using the reduced parameter space a very low δ_Def has to be assumed in order to reproduce the experimental observations. Therefore a new model is proposed here that is very similar to the ad-atom model but is based on a different mechanism to create weakly bonded surface atoms. The paper shows that inclusion of He atoms during exposure to high flux (10²² m⁻² s⁻¹) of low energy He (50 eV) leads to the formation of weakly bonded atoms in the surface. The comparison of both models with experimental data and their applicability to other projectile/target systems is discussed.     

基于MCGS的CSR真空连锁控制系统设计

介绍了MCGS工控组态软件,并以之构建了CSR真空连锁控制系统和系统的总体结构,相关软硬件和MCGS下设备驱动程序设计．实践证明该系统开发周期短．可靠性高,具有较好的可移植性和可扩充性。     

智慧维修辅助系统的研发与应用

仪控技术管理如风险分析、安措分析、核电厂分布式控制系统（DCS）文件管理等,是核电厂仪控工作领域的难点和重点,为降低因仪控工作准备不充分而产生的机组非预期缺陷和停机停堆风险,基于对DCS工程文件及设计文件的研究,开发了一套智慧维修辅助系统。该系统对接现场人员高频使用场景,辅以计算机数据库信息建模技术,实现了DCS组态智能分析、DCS系统状态监测、自动风险提示、一站式检索功能,可以有效提升核电仪控调试和维修领域信息化管理水平,提高人员工作效率。     

提案管理系统的设计与实现

介绍了-个采用PowerBuilder开发的提案管理系统.该系统采用客户端/服务器结构,分为用户管理、提案数据管理、任务数据管理、日志管理四个部分.描述了总体的设计思想、基本功能设计、数据库设计和关键技术.该系统能够帮助用户快速、方便的管理提案数据,在实际中得到了很好的应用.     

圆管内偏离泡核沸腾机理模型的比较分析

分析比较了基于壁面汽泡壅塞模型和汽泡下液膜烧干两种机理的圆管内偏离泡核沸腾机理的5个模型，并与偏离泡核沸腾（DNB）实验数据进行了比较分析，得出了各种模型的优缺点。     

先进超导托卡马克实验装置等离子体密度远程控制系统

在先进超导托卡马克实验装置实验阶段,与密度控制有关的实验数据和信息存储在实验现场的计算机系统中,对这些数据进行分析研究时需要到现场才能采集或获取.设计了托管控件,用于等离子体密度远程控制系统业务逻辑的封装,实现了增强型的B/S计算结构,解决了远程控制过程中复杂的科学计算,并实现了实验进程的同步监视.还在数据交换机制中部署了web services和Data File services两层服务,有效地维护了数据传数链路的松散耦合特性.实验证明,它不仅实现了密度的远程控制功能;而且在目前的托卡马克实验情况下,具有较好的数据传输性能.     

分布式控制系统动态重构技术研究与实现

动态重构是一种在控制系统运行时进行控制组态无扰更新的技术,它与控制系统的体系结构、控制组态方法以及管理机制等技术问题密切相关。本工作研究动态重构技术的基本特征,探讨控制组态技术标准与动态重构之间的内在联系。基于图形化的控制组态方法,提出一种独立于控制站计算平台的数据引擎模型和相应的工程实现技术,将动态重构过程转化为控制站实时数据库的数据更新过程。采用多代理软件工程的方法实现数据引擎机制。提出在可编程控制器（PLC）中实现动态重构技术的方法,并将该技术应用到发电机组的分布式控制系统中。对动态重构技术在核电站I&C系统中应用的有关问题也进行了探讨。     

Recent activities in the field of reactor physics

ABSTRACT

Reactor Physics that treat the essentials of how fission nuclear reactors work fundamentally has played important roles in safe operations and design studies of various types of nuclear reactors. From the latest activities in the field of reactor physics, this report summarizes some outstanding researches and developments published in scientific journals, including the Journal of Nuclear Science and Technology and others.     

ICRF Heated Long-Pulse Plasma Discharges in LHD

A long-pulse plasma discharge for more than 30 min. was achieved on the Large Helical Device （LHD）. A plasma of ne = 0.8 × 10^19 m^-3 and T10 = 2.0 keV was sustained with PICH = 0.52 MW, PECH = 0.1 MW and averaged PNBI = 0.067 MW. Total injected heating energy was 1.3 G J, which was a quarter of the prepared RF heating energy. One of the keys to the success of the experiment was a dispersion of the local plasma heat load to divertors, accomplished by shifting the magnetic axis inward and outward.     

反应堆系统数字化实时仿真的高效实现

根据实验反应堆的物理特性,建立堆芯动态模型,探讨多种实时仿真算法的实现途径。研究提出了进行数字化实时仿真的一种高效实现方法。为配合功率调节系统半实物仿真试验而实现了一座实验反应堆在Windows平台下的实时仿真系统。 