大功率脉冲电源的模块化设计及实现

以兰州重离子加速器冷却储存环(Main Cooler Storage Ring at Heavy Ion Research Facility in Lanzhou,HIRFL-CSRm)四极铁电源为例,介绍了一种大功率数字脉冲电源的模块化设计方法。采用了模块化标准化设计原则,大幅度降低了电源尺寸,提高了原部件集成度和功率密度,对电源进行了热分析。搭建完成了一台样机,通过样机验证,测试了电源热分布及电磁兼容性EMC(Electro Magnetic Compatibility)性能。测试结果表明,这种模块化结构达到了设计要求。     

Comparative assessment of low-capacity power facilities for distributed power generation

The selection of a new power generation alternative must be based not only on scientific-technical progress but it must also take account of manifold external socioeconomic, climatic, and other factors in the region of the site chosen for the power plant. The presence of energy resources, scattered consumers, maximally justified power transmission distances, severe climatic conditions, and transportation possibilities affect the choice of power facilities and impose restrictions on their technico-economic performance parameters. A single technology cannot be the solution for all energy problems of regions which are not part of the unified energy system of the country. Work on finding and validating the optimal energy alternative taking account of the restrictions on and specific characteristics of the development of the territory under consideration must be performed for each specific site, power system, and region. A comparative economic analysis of three energy alternatives is presented for the Ust-Yanskii district of Yakutiya.     

Neutrino method remote measurement of reactor power and power output

Conclusions The neutrino method is essentially a remote method and does not require contact with the elements of the reactor. The accuracy and reproducibility of the neutrino procedure in measurements of the power and power output of the VVéR-540 reactor are close to the data obtained with thermal measurements. For other types of reactors the neutrino method can be more accurate than the traditional methods. The neutrino method makes it possible to monitor plutonium production directly during the plutonium production process. It is possible to develop a method of neutrino tomography for monitoring the spatial nonuniformity of energy release in the fuel core of the reactor as well as methods for monitoring in the case of accidents. Neutrino installations are now portable and compact, and they can be further improved. We are not offering the neutrino method as an alternative to other methods of monitoring, which have been checked over a period of many years, but rather we regard it as a method for extracting additional information in order to obtain a more complete picture of reactor operation. We thank A. G. Vershinskii for providing the electronics for the experiment, and I. N. Machulin for helpful discussions and for calculating the composition of the fuel core, and the management and personnel of the nuclear power plant for assistance. Institute of General and Nuclear Physics, Russian Scientific Center "Kurchatovskii institut." Translated from Atomnaya énergiya, Vol. 76, No. 2, pp. 130–135, February, 1994.     

3.7GHz大功率3db功分器设计

设计了一种用于3.7GHz低杂波电流驱动（LHCD）系统的高功率3db功分器。论文基于奇偶模理论和S参数矩阵分析,得到初步的3db功分器结构参数,然后利用高频仿真软件HFSS进行结构仿真和参数优化,得到最优结构,使得3db功分器的VSWR=1.02、D=35db、C=3.03db、I=38.2db。同时详细分析了大功率下的热损耗情况,提出了合理的散热方式,保证了功分器在长脉冲大功率时,表面平均温度处于63℃的平衡状态。     

Nuclear power technologies at the stage of sustainable nuclear power development

It is not simple to solve the problem of competitiveness of nuclear power technologies in evolutionary upgrading the conventional nuclear power plants (NPP) such as light water reactors (LWR), which requires high expenditure for safety. Moreover, the existing LWRs cannot provide nuclear power (NP) for a long time (hundreds of years) because the efficiency of use of natural uranium is low and closing the nuclear fuel cycle (NFC) for those reactors is not expedient.The highlighted problem can be solved in the way of use of innovative nuclear power technology in which natural uranium power potential is used effectively and the intrinsic conflict between economic and safety requirements has been essentially mitigated.The technology that is most available and practically demonstrated is the use of reactors SVBR-100 — small power multi-purpose modular fast reactors (100 MWe) cooled by lead-bismuth coolant (LBC). This technology has been mastered for nuclear submarines’ reactors in Russia.High technical and economical parameters of the NPP based on RF SVBR-100 are determined from the fact that the potential energy stored in LBC per a volume unit is the lowest.The compactness of the reactor facility SVBR-100 that results from integral arrangement of the primary circuit equipment allows realizing renovation of power-units LWRs, the vessels’ lifetime of which has been expired. So due to this fact, high economical efficiency can be obtained.The paper also validates the economical advantage of launching the uranium-fueled fast reactors with further changeover to the closed NFC with use of plutonium extracted from the own spent nuclear fuel in comparison with launching fast reactors directly with on uranium-plutonium fuel on the basis of plutonium extraction from spent nuclear fuel of LWRs.     

High-temperature heat pipes for power modules of space nuclear power systems

The results of an experimental analysis of the technology for producing high-temperature heat pipes and choosing their structure so as to ensure a long service life and high performance characteristics required for the power modules of space nuclear power systems with an out-of-core energy conversion system are examined. It is estimated that the operation of molybdenum-lithium heat pipes, fabricated using the technology developed, for the power modules of such nuclear power systems will be stable for >10⁵ h. 2 figures, 1 table, 13 references. State Enterprise Krasnaya Zvezda. Translated from Atomnaya énergiya, Vol. 89, No. 1, pp. 82–86, July, 2000.     

核电与常规电的异同——浅议从常规电向核电工作转变的体会和认识

随着国家"积极推动核电发展"指导思想的贯彻落实,尤其是2006年国家确定引入美国西屋AP1000核电技术路线之后,以常规电为背景的一些电力集团均不同程度地参与了核电前期开发、工程建设等方面的工作,传统的核电企业如中核集团、中广核集团也大量地招聘、招收了一定比例的常规电从业人员。这些长期从事常规电工作的人员从事核电工作以后,如何能够尽快实现工作转变,早日适应核电的工作要求,做到从工作的转变到观念的转变,知识的转变,思维方式的转变,熟练驾驭的转变,从而成为一名合格的核电工作者。本文从核电的技术特点、管理特点、文化特点和从事核电工作应关注的几个方面问题进行阐述,以期为这一特定时期的核电发展贡献一份力量。     

融核于电，以电促核

在全面总结中国电力投资集团公司（简称中电投）核电发展取得阶段性成果的基础上,介绍了山东海阳核电项目一期工程建设模式,阐述了中电投核电发展的战略思考。     

核反应堆棒控电源电路仿真与优化

棒控电源是核电站反应堆燃料棒的驱动机构的电源,核电站内的棒控电源柜通常与驱动机构相距较远,通过电缆相连接。为了提高设备的集成度,棒控电源柜中多个直流斩波模块共用一个整流模块,这种设计大大增加了直流母线的长度。直流母线和电缆的分布电感和分布电容,会产生电压过冲、增加开关损耗、产生高频振荡,并对电源控制产生巨大干扰。通过对电源电路的分析,计算直流母线的分布电感和电缆的分布电容,建立棒控电源系统PSIM仿真模型,得到了与样机测试波形近似的仿真结果。然后提出了减小直流母线分布电感的优化方法,经理论推导和仿真验证,可有效改善高频振荡和电压过冲等问题,显著提高电路性能指标。