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基于对核电装备制造业供应风险的识别,确立风险预测的指标体系;对国内3家重点核电装备制造企业及其60家供应商进行问卷调查及深度访谈,运用支持向量机与决策树组合的方法建立供应风险的预测模型.实证研究表明,组合预测模型对供应风险预测的精确性优于单一方法的模型,证明了该预测体系的可行性与可靠性,为核电装备制造业供应风险的管理提... 相似文献
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核电机组在甩负荷工况下,汽水分离再热器开关量高液位触点会因闪蒸而产生虚假信号,存在误触发跳机保护风险。通过深入分析闪蒸原理及跳机逻辑,挖掘潜在的机组非预期跳机风险,并结合设备布置结构、系统运行原理、关联调节阀控制以及跳机保护需求等,提出两种优化改进方案,并对比分析其优缺点,实现既能避免原有的误动风险,又防止引入新的拒动风险。通过高功率平台下的瞬态试验对优化方案进行验证,结果表明,通过本次优化可有效消除潜在的跳机风险,在保护设备本身安全稳定运行的同时,也提高了核电站汽轮发电机组整体运行安全,对其他核电机组瞬态过程中疏水闪蒸风险防范也有很好的借鉴意义。 相似文献
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核电厂运行经验反馈和概率安全分析表明,核电厂在停堆状态下具有相当大的堆芯熔化的潜在风险。本文叙述了核电厂运行经验反馈,概率安全分析和事故分析的结果,以及相关的措施和研究课题,特别涉及到停堆状态下的非可控硼稀释事故的维修冷停堆下推动余热排出系统。 相似文献
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针对野外环境下供电方式的特点,提出了一种基于分块间断供电的电源管理方法,以降低遥测终端的耗电量,适应其长期无人值守自动监测的要求。讨论了它的基本结构、工作原理及实现技术,以应用实例说明了其有效性。 相似文献
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Masa-Aki Ochiai 《Progress in Nuclear Energy》2000,37(1-4):259-263
The effective of the nuclear reactor as the source of heat supply is more expected considering that the energy demand will increase and that the energy consumption structure will convert in Japan. The output scale of such reactors is to be less than 300MWt from the limit of supply area. We are studying two types of such reactors. One is the system for district heat supply with a nuclear reactor MR100 type and the other is for heat supply in buildings with a cassette type nuclear reactor MR1. The conception of these nuclear reactors is originated from the marine nuclear reactor technology. They are of highly safety with passively safe system and highly load following ability. 相似文献
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吴宜灿 《等离子体科学和技术》2001,3(6)
1. IntroductionAlthough the recent experiments and associatedtheoretical studies of fusion energy development havedemonstrated the feasibility of fusion power, it iscommonly realized that it needs hard work beforepure fusion energy could be commercially and eco-nomically utilized. On the other hand, the fissionnuclear industry has been falling on hard tithes re-cently since so far there has been no conclusion abouthow to deal with the long-lived wastes produced fromthe nuclear spent fuel and a… 相似文献
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《Fusion Engineering and Design》2014,89(5):563-567
In order to enhance control speed, each up/down Cu passive plate in EAST is cut into 8 pieces. These discontinuous plate segments are still connected to the inner vacuum vessel by steel supporting legs. A model of this plate segments-vessel-supporting leg loop is developed and verified by EAST vertical displacement event (VDE) experiments. The internal coil (IC) power supply requirements for VDE control are also evaluated. In particularly, we investigate the efficacy of internal control coil location to minimize the power supply capability. The IC power supply upgrade requirements for the optimized location and actual location are discussed. VDE experiments to evaluate maximum controllable vertical displacement (dZmax) were done with varying elongation and resulting EAST vertical controllability estimates are summarized here. These experimental results verified previous simulation results that present IC power supply capacity cannot provide robust vertical control. 相似文献
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世界铀市场的供求现状和核燃料循环决策浅析 总被引:1,自引:0,他引:1
本文介绍了近几年来国际形势变化后引起的世界铀市场供求现状,指出铀市场疲软的状况还将持续相当长的一段时期。在此基础上分析了各国核燃料循环末端决策的三种现状和原因。 相似文献
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基于EPICS的注入凸轨脉冲电源控制样机研制 总被引:2,自引:2,他引:0
中国散裂中子源(CSNS)快循环同步加速器(RCS)是一台高束流功率质子加速器,凸轨磁铁脉冲(BUMP)电源是CSNS注入系统的重要设备。根据CSNS工程建设的要求,需在预研阶段研制一套凸轨电源控制样机,用于研究和解决控制系统建造中的一些关键技术。注入凸轨电源样机通过横河公司生产的WE7000测量系统实现对脉冲电源的控制,根据物理设计需要可完成对电源的任意波形给定输出并实现对电源输出波形的回采显示。本文主要介绍了基于EPICS系统的WE7000设备驱动的开发,以及在此基础上研制的注入凸轨脉冲电源控制样机的应用。通过联机测试的结果表明,该样机满足对注入凸轨脉冲电源的控制要求,达到了预研目的。 相似文献
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较为全面研究安全壳内主给水管道破裂事故,特别是在小破口事故。采用分析的方法,从介绍主给水管道破裂事故的定义开始,进而总结导致主给水管道破裂事故的原因。详细分析了给水管道在安全壳内出现小破口事故的演变过程,机组的主要风险或后果,提出了运行人员对其进行诊断的方法和针对不同泄漏程度的处理策略。 相似文献
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The sharply higher demand for uranium for nuclear power during 2010–2050 and possibilities of modern mineral-material resources
to meet these needs are evaluated on the basis of an analysis of IAEA information and other publications. Forecasts to 2030
show adequate reserves and resources for producing the required amount of uranium. New deposits will supply production expansion
beyond 2030. 相似文献