共查询到19条相似文献,搜索用时 187 毫秒
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秦山核电二期工程反应堆及反应堆冷却剂系统的仪表和控制设计参考了大亚湾核电站的设计,但作了冷却剂系统三环路改二环路的适应性修改.本文总结了秦山核电二期工程反应堆及反应堆冷却剂系统仪表和控制的设计、重要仪表控制设备的研制.具体介绍了反应堆保护系统保护变量的选取、反应堆控制系统对堆芯的控制和监测以及提高核电厂可利用率的设计,并着重介绍了重要仪表控制设备的国产化研制过程.1号机组的成功运行证明设计和研制是非常成功的. 相似文献
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《核电子学与探测技术》2017,(7)
为进一步确保反应堆保护系统的安全可靠,建立了一套通用应用软件集成测试方法。该方法应用于福清核电厂5号、6号机组RPS系统,本文详细描述了该方法中的测试设计、仿真环境搭建、测试执行以及测试结果评估,为今后其他DCS项目的集成测试提供参考。 相似文献
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反应堆保护系统是核电厂中非常重要的安全系统,主要用于保护反应堆、环境及人员的安全,属于核电厂1E级仪表控制设备,其自身的可靠性和安全性,对核电厂的正常运行起着至关重要的作用。其中反应堆保护系统架构对整个系统的可靠性、可用率和可维护性等起着关键作用。本文基于龙鳞(NASPIC)平台,根据反应堆保护系统的功能需求和设计准则,提出了一套较为完善合理、满足功能和设计准则要求的反应堆保护系统架构。同时根据架构设计搭建了“华龙一号”科研样机,并基于FTA/Markov可靠性分析方法,就搭建的保护系统科研样机进行了功能测试和可靠性分析计算,证明反应堆保护系统架构设计符合设计要求,为后续项目的系统架构设计提供参考。 相似文献
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目前国内核电厂主要采取定期校准的方式对安全级仪表漂移进行管理,但该方法过于保守且经济性差。基于此,本文对安全级仪表在线监测系统技术进行了研究,首先对安全级仪表实际漂移数据进行了分析,明确了核电厂安全级仪表漂移的主要类型,证明了对安全级仪表开展在线监测的可行性。其次,通过对相关法规及标准的分析和研究,明确了核电厂安全级仪表在线监测技术的基本要求。最后,开展了在线监测系统技术的数据分析研究,对冗余仪表提出了等价平均算法,对非冗余仪表算法进行了分析并对多元状态估计模型(MSET)方法开展了基于电厂实际数据的建模验证,证明了该方法在核电厂应用的可行性。 相似文献
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介绍了田湾核电站水-水高能反应堆(VVER)机组松脱部件监测系统(LPMS)的设计和设备结构组成,描述了其设计与美国核管会(NRC)RG1.133相关条款要求的差异。基于这些差异以及VVER机组的特殊性,分析了拟采取的改进措施存在的困难和不利影响。为执行与NRC RG1.133中安全要求相当的功能,在田湾核电站3号机组调试阶段开展了LPMS系统的功能补充试验,获取与压力容器相关的传感器信号的响应,验证了目前的传感器布置方式能满足NRC RG1.133的设计要求。 相似文献
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利用在役核电站停堆检修的窗口,对核电站蒸汽发生器进行模拟松动部件撞击的试验,给出了松动部件监测系统(LPMS)在经过长期运行后的主要缺陷模式及处理方法。在指出LPMS故障自检功能中存在的盲区的基础上,分析了存在缺陷的通道对松动部件冲击信号的响应特征。研究表明,通道接触不良、电荷累积和多通道间信号干扰是造成通道信号失真的主要因素;电荷累积会对信号通道造成静电阻塞;多通道间的信号干扰是产生误报警、通道过载断路等现象的重要原因之一。 相似文献
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为满足远距离无人值守化等极端环境下的电源可靠供给,本文提出了一种结合碱金属热电转换器(AMTEC)的小型模块化反应堆(SMR)的概念,即SMR-AMTEC系统。针对该小型模块化反应堆的概念设计,本文研发了3项关键技术,即:基于转鼓的堆物理控制技术;正常功率条件下一回路全自然循环技术;基于自然循环的余热排出技术。针对与该小型模块化反应堆相耦合的小型多管循环式AMTEC单元,本文重点开展了3项关键部件制备技术的研发,即:AMTEC的TiN多孔薄膜电极制备技术;β″氧化铝固体电解质组件封接技术;吸液芯组件的制备及测试技术。通过对以上技术的研究与开发,初步验证了SMR-AMTEC系统的可行性。 相似文献
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At the request of the U.S. Nuclear Regulatory Commission (NRC), an assessment of the technical development status of loose-parts monitoring systems (LPMS) and their performance record to date in commercial light-water-cooled nuclear reactor plants was made during the spring of 1977, using an on-site personal interview and equipment demonstration approach. Our study revealed that while presently demonstrated LPMS technology does indeed provide a capability for detecting the presence of those relatively massive loose parts that would likely constitute a serious operational or safety hazard to the plant, it unfortunately affords little information useful to the determination of the parts' safety significance and has not yet attained the levels of sophistication and reliability ordinarily associated with safety systems. We also found a definite need for specification of the functional requirements for LPMS, in the form of a clear and comprehensive statement of NRC policy regarding the formulation and implementation of safety-oriented, yet operationally practicable, loose-parts monitoring programs for both existing and future nuclear generating stations so that overall objectives of both the utilities and the regulatory agency might be satisfied simultaneously.
While it is our best technical judgment that loose-parts monitoring programs providing reliable detection (but not characterization) capabilities could be implemented with today's technology, the path on which the nuclear utility industry should proceed in order to meet NRC expectations is not completely clear. A Regulatory Guide entitled “Loose Part Detection Program for the Primary System of Light-Water-Cooled Reactors,” soon to be issued for public comment, constitutes a first step towards satisfying this need for guidance and goal establishment. 相似文献
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《IEEE transactions on nuclear science》1973,20(4):12-17
At facilities having a research-training reactor, such as the University of Missouri-Rolla Reactor (UMRR), one finds it necessary to perform a large number of rod calibrations during the course of the year. In practice rod worths are determined by measuring the reactor period created by an incremental withdrawal of the rod under calibration. Period is then related to reactivity thru the use of a publication such as the AEC publication, IDO16485. This frequent measurement of period makes it desirable to have a simple, automatic and accurate method to make such measurements. At UMRR we have designed, constructed and installed such an instrument. The instrument measures doubling time rather than period but, thru the use of an internal time base conversion, displays a four bit decimal number that is the reactor period in seconds. The instrument is simple in concept and utilizes the 7400 Series integrated circuits in the largest portion of the unit. The instrument is easy to operate and once initiated, will automatically complete the measurement of the period displaying the results. Error in the instrument can be shown to be less than 1.5%. Thus the unit meets the three requirements of simplicity, accuracy and ease of operation and in addition is moderately inexpensive, less than $120. 相似文献
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Ryoichi Kurihara Yasushi Seki Shuzo Ueda Isao Aoki Satoshi Nishio Toshio Ajima Tomoaki Kunugi Kazuyuki Takase Michinori Yamauchi Izumi Hosokai Takashi Okazaki Seiichiro Yamazaki 《Journal of Fusion Energy》1997,16(3):225-230
A vacuum vessel (VV) of a tokamak fusion reactor like the International Thermonuclear Experimental Reactor (ITER) consists the first confinement barrier that includes the largest amount of radioactive materials such as tritium and activation products. The ingress of coolant event (ICE) is a design basis event in the ITER where water is used as the coolant. The loss of vacuum event (LOVA) is also considered as an independent design basis event. Based on the results of ICE and LOVA preliminary experiments, an integrated in-vessel thermofluid test is being planned and conceptual design of the facility is in progress. The main objectives of the integrated test are to investigate the consequences of possible interaction of the ICE and the LOVA and to validate the analytical model of thermofluid events in the VV of the fusion reactor. This paper introduces a conceptual design of the integrated test facility and a testing plan. 相似文献