压水堆堆芯燃料管理软件包——PSUI-LEOPARD/ADMARC 和 PSUI-LEOPARD/NGMARC

本文简要介绍二维多循环堆芯燃料管理软件包 PSUI-LEOPARD/ADMARC,同时介绍以节块格林函数方法为基础的燃料管理软件包 PSUI-LEOPARD/NGMARC。对二维 LWR 基准题及三里岛核电站(TMI-1)的第一和第六两个循环作了验算,计算结果表明 PSUI-LEOPARD/NGMARC 不仅计算精度高于 PSUI-LEOPARD/ADMARC,而且计算速度提高了一倍。     

中子活化分析应用软件包SPAN

SPAN V2.0是一个用于中子活化分析的软件包,它是在CANBERRA S80多道—PDP11/34计算机系统上发展研制的。这个软件具有以下特点:     

AFA 3G燃料棒芯块与包壳间相互作用分析

介绍了大亚湾核电站18个月换料策略下，在Ⅱ类工况瞬态期间AFA 3G燃料棒芯块与包壳间相互作用（PCI）的分析和预测。文中给出了PCI技术限值，介绍了Ⅱ类工况瞬态分析和热力机械分析的分析方法和程序，并给出了基荷运行、基荷加一次调频运行、负荷跟踪运行以及延伸低功率运行时的负荷过量增加、功率状态下控制棒失控抽出和未检测到的掉棒3种瞬态的PCI主要计算结果和结论。     

稀土元素X射线快速自动分析系统

文章阐述了一种新型稀土元素测试系统(即稀土X射线快速自动分析系统)的研制。叙述了系统配置及有关功能,分析了数据获取及处理系统软件包的特点,其特点在于运用了INTEL8086/8088汇编语言和编译BASIC语言混合编程方法,起到充分利用IBM-PC/XT微机的硬设备资源的效果,重点介绍了系统软件包的设计思想(人机接口、稀土元素X荧光分析方法、回归曲线拟合、软件稳谱),表明该系统既可用于工业生产部门也可用于科研单位。     

基于ROOT软件包的数据远程获取系统编程

在Linux操作系统中利用ROOT数据软件包,可以开发出稳定可靠的远程数据获取系统。可以通过Intranet网络协议远程获取来自CAMAC机箱控制器的大量前端实验数据,并通过ROOT软件包开发用户操作图形界面,对数据进行离线分析。利用带有三种灵活数据接口方式：以太网、PCI和VSB接口的CAMAC机箱控制器一GTBC,并对其内含的嵌入式系统芯片进行网络服务器编程。可对实验数据进行稳定可靠的远程存取和图谱分析。     

自动推导三阶象差系数解析表达式软件包

介绍一个能够自动推导三阶象差系数解析表达式的软件包,并对软件包的推理规则和执行过程进行了详细讨论。以旋转对称透镜和静电多极透镜作为应用例子,给出了计算机输出结果,以示软件包之实际应甲。     

EPICS的中断处理应用研究

EPICS是由美国阿贡国家实验室(ANL)和洛斯阿拉莫斯国家实验室(LANL)联合开发的控制系统软件包.中断是CPU与外设之间进行数据传送的一种方式,可以提高CPU的效率.在开发EP-ICS的PCI和VME总线驱动程序时,经常要使用中断的方式,因此需要对EPICS的中断机制进行研究.论文描述了在PowerPC体系结构、...     

压水堆堆芯燃料管理计算软件包GLORY的研制

在国外较低版本的组件参数计算程序基础上,通过研制基于截面表插值方式的组件参数重建程序,以及现代粗网节块法结合精细功率重构的三维堆芯计算程序,再配以堆芯轴向一维细网格计算程序和用户界面,开发形成了可供压水堆堆芯燃料管理计算的软件包——GLORY。主要介绍了该软件包的有关理论模型及在秦山一期的整体应用情况,有关该软件包的详细工程验证将另文介绍。     

核电厂不锈钢覆面焊接模拟件腐蚀行为研究

对3种核电厂乏燃料水池不锈钢覆面材料S32205、S32101和S30403的焊接模拟件,在H₃BO₃浓度2500 mg/L、SO₄2?浓度1500 mg/L、Cl?浓度5%、pH值5.0、温度80℃、饱和氧的条件下浸泡6个月,对比研究其腐蚀行为。结果发现:S30403焊接模拟件在焊接节点和缝隙附近出现了大量的氯致应力腐蚀裂纹;S32101焊接模拟件出现了腐蚀坑,在焊接节点和缝隙附近腐蚀尤其严重;S32205焊接模拟件腐蚀最轻,试件表面未发现腐蚀坑及裂纹。研究表明:3种材料模拟件的耐腐蚀性规律为:S32205>S32101>S30403。S32205具有良好的综合力学性能和耐腐蚀性能,是一种理想的改进型水池覆面材料。      

基于PCI总线的氡室检测系统

介绍了FPGA与PCI总线在氡室检测系统中的应用优势、总体设计原理。并对PCI总线在氡室检测系统中的具体硬件系统结构、控制芯片与驱动软件设计,与PCI总线对核谱转换的传输性能作了阐述。     

Influence of magnetic filter field on the radio-frequency negative hydrogen ion source of neutral beam injector for China Fusion Engineering Test Reactor

In the design of negative hydrogen ion sources,a magnetic filter field of tens of Gauss at the expansion region is essential to reduce the electron temperature,which usually results in a magnetic field of around 10 Gauss in the driver region,destabilizing the discharge.The magnetic shield technique is proposed in this work to reduce the magnetic field in the driver region and improve the discharge characteristics.In this paper,a three-dimensional fluid model is developed within COMSOL to study the influence of the magnetic shield on the generation and transport of plasmas in the negative hydrogen ion source.It is found that when the magnetic shield material is applied at the interface of the expansion region and the driver region,the electron density can be effectively increased.For instance,the maximum of the electron density is 6.7×1017 m-3 in the case without the magnetic shield,and the value increases to 9.4×1017 m-3 when the magnetic shield is introduced.     

EPICS下的EtherNet/IP协议的研究

在EPICS下建立了采用EtherNet/IP协议的ControlLogix PLC测试系统,分析了ControlLogix的EtherNet/IP在EPICS环境下驱动程序的实现原理及软件层次结构,解决了现有驱动程序的不足之处,最后进行了ControlLogix EtherNet/IP通讯性能的测试,结果表明它在数据传输的实时性、稳定性、可靠性等方面有良好的性能.     

基于GTL技术的高速背板总线设计

介绍了一个高速背板总线的设计尝试。采用新型的GTL总线收发器、时钟相位调节和组合式匹配等技术措施,解决了总线设计的驱动、时序和信号完整性问题,实现了100Mbd/s的同步数据传输。     

基于G-Link的实验数据采集传输系统

详细介绍了一个基于G-Link高速光纤数据传输系统；分析了以HDMP-1022／HDMP-1024为核心的光纤链路的基本构成和配置、激光管驱动电路、CIMT编码等内容。并利用G-Link设计了一个应用在风洞实验中的16通道数据采集和传输系统。     

Whole-core damage analysis of EBR-II driver fuel elements following SHRT program

In the Shutdown Heat Removal Testing (SHRT) Program in EBR-II, fuel element cladding temperatures of some driver subassemblies were predicted to exceed temperatures at which cladding breach may occur. A whole-core thermal analysis of driver subassemblies was performed to determine the cladding temperatures of fuel elements, and these temperatures were used for fuel element damage calculation. The accumulated cladding damage of fuel element was found to be very small and fuel element failure resulting from SHRT transients is unlikely. No element breach was noted during the SHRT transients. The reactor was immediately restarted after the most severe SHRT transient had been completed and no driver fuel breach has been noted to date.     

基于WinDriver工具的PCI卡驱动程序开发

介绍了WinDriver驱动程序开发包的特点、工作原理以及利用该工具开发驱动程序的方法和步骤.以X-Scan线阵X射线探测器帧捕获卡驱动程序编写为例,介绍了基于VC 6.0环境,使用WinDriver开发Windows设备驱动程序的一种简捷而高效的方法.     

TMSR核能放化控制区出入控制系统软件设计

出入控制系统是进入核能控制区域的屏障,本文介绍了基于EPICS软件包实现的钍基熔盐堆核能项目(Thorium Molten Salt Reactor,TMSR)放化控制区域出入控制系统的软件设计。通过新的设备驱动、数据库结构、软件接口和人机界面的开发,实现了该系统身份验证、污染报警、个人计量统计和事件记录等功能。使用EPICS软件包实现该系统,不仅可以降低成本,减少该系统对设备厂商的依赖性,最重要的是实现了TMSR实验堆项目仪控系统软件构架的统一。该系统软件开发已经过测试验收,证明其功能和可靠性均能满足设计要求,本文还对系统安全性方面的提高展开讨论。     

Inertial fusion energy development beyond 2000

Conclusions Ultimately, of course, a prototype power plant will be built at a power level appropriate for planned future commercial operations. This could use the same ETF/ DPP driver or a new one tailored to the plant size and with less experimental flexibility than the ETF driver. With the experience and data gained from a number of small demonstration reactors, and from the operation of the ETF/DPP driver and target factory, it is quite likely that a variety of plant sizes options will be available at that time.The scenario explored here is a relatively low-cost development program for fusion energy, which encourages technology transfer to American industry at an early stage. If the government builds an ETF driver, target factory, a single-shot experiment area, and a burst mode facility, commercial companies may be interested in building their own small demonstration reactors which would be supported by the government facilities. The fact that the ETF and any number of DPPs could be supported by the same driver and target factory means that the incremental cost of trying many alternatives is small. The fact that IFE demonstration reactors can test all relevant parameters at low power means that IFE has no extremely high-cost (multi-billion dollar) development facility to build in order to demonstrate engineering feasibility, i.e., there is no large development hurdle to surmount. We can, indeed, start small and work our way larger as the results justify. The result of this approach may produce competitive IFE power plant designs from a few to a few thousand megawatts.     

Integrated low-noise low-power fast charge-sensitive preamplifierfor avalanche photodiodes in JFET-CMOS technology

To take advantage of the compactness of avalanche photodiode (APD) arrays, low-noise power-efficient fast charge-sensitive preamplifier chips with differential current drivers have been developed. A 16-channel and a single-channel version are available. The chips were adapted for low-capacitance 4×8 APD arrays produced by Hamamatsu, Japan. A mixed junction field-effect transistor (JFET)-CMOS production process yielded high-quality integrated JFETs for the input stage of the amplifier's folded cascade. Thus, the 1/f-noise corner is kept at 4 kHz. The JFET has a transconductance of 11 mS at a drain current of 3 mA. The serial noise of the input transistor was found to be 0.8 nV/√(Hz). The signal rise time of the driver outputs is 20 ns. The rms noise of the preamplifier was found to be 480 e^- with a 25 e^- /pF noise slope for a shaping time of 50 ns. The serial input noise of the preamplifier is about 1.4 nV/√(Hz) from 200 kHz up to 40 MHz, and the 1/f-noise corner is at 70 kHz. The power consumption is 30 mW per preamplifier, including the differential driver. The linearity is better than 1.3% over 48 dB dynamic range. For the 16-channel chip, the channel-to-channel gain variation is less than 3.5%. Performance similar to photomultiplier tubes can be achieved with APDs in combination with this integrated preamplifier chip