共查询到20条相似文献,搜索用时 10 毫秒
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《Journal of Nuclear Science and Technology》2013,50(7):1046-1056
As research regarding small- and medium-sized nuclear reactors (SMRs) has rapidly increased worldwide, the Regional Energy Research Institute for Next Generation (RERI) is designing a new conceptual nuclear reactor, called the Regional Energy rX-10MWt (REX-10). The REX-10 is an integral-type nuclear reactor and adopts natural circulation for heat removal. Since the REX-10 is designed for district heating and small-scale power generation near residential areas, it has to guarantee safety under all circumstances. Thus, the REX-10 Test Facility (RTF) is designed to evaluate the natural circulation behavior in the REX-10. On the basis of a theoretical model and reactor safety, two experimental parameters (heater power and feedwater flow rate) were chosen and various transient experiments are conducted. As a result of six transient experiments, the RTF guarantees safety against abrupt changes in the experimental parameters. Furthermore, all the experiments are simulated by using the MARS code. In most cases, the results of the MARS code show good agreement with the experimental results. However, in case of the chiller trip, the MARS code overestimates the temperature and generates a fluctuation of the primary flow. However, both results show a similar trend after the fluctuation is finished. 相似文献
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空间堆堆芯热管蒸气流动计算方法研究 总被引:1,自引:0,他引:1
空间核反应堆电源采用热管进行堆芯冷却。堆芯热管内部工质的蒸发与冷凝导致内部蒸气流动与管内流动有很大不同,必须考虑变质量流动和轴向速度分量与径向速度分量两者的存在。对堆芯热管内蒸气流动的压力、温度分布和速度分布的计算方法进行研究,开发空间堆堆芯热管蒸气流动的计算程序SNPS-HPD,利用钠热管的实验数据对程序进行验证,并利用SNPS-HPD对HP-STMCs空间堆堆芯锂热管在不同运行工况下的蒸气流动特性进行设计校核计算。计算结果与文献计算值符合较好,说明SNPS-HPD程序可用于空间堆堆芯热管的设计校核计算。 相似文献
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核反应堆反应性的测量技术的研究对于表征反应堆的安全运行和发挥其经济效益有着重要的意义。计算笔记将抽象、复杂的研究分析过程文字化、可视化。论文以核反应堆反应性的测量技术研究过程为例,详细阐述了其计算笔记的运用,并在此基础上建立标准化分析模型、进行设计改或设计优化,不仅有利于对研究过程的再认识,还有利于增强反应堆的反应性测量技术的核心技术竞争力。 相似文献
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对于堆物理工程设计中常用的碰撞几率程序CPXY和两维S_N计算程序DOT3.5,以及最近研制的穿透几率程序TPXY,本文简述了其理论模型,并着重就它们的计算精度,计算时间和网格的划分,进行了系统的数值研究。所计算分析的组件基准问题和例题,复盖了目前PWR和BWR堆芯组件的几何结构和核不均匀性。研究结果表明,穿透几率程序TPXY是当前工程上实用的计算效率最高的组件计算程序。 相似文献
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提出了一种反应堆吊筛结构在水中作梁型振动的分析方法,介绍了计算模型,端部弹性支承刚度、等的确定,最后得到了振动频率的计算公式。 相似文献
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《Journal of Nuclear Science and Technology》2013,50(6):670-672
We calculated the nuclear reactor antineutrino spectrum on the basis of nuclear data libraries (JENDL-3.2, JNDC-V2). The antineutrino spectrum was first calculated with neglecting energy dependence of matrix element, and the result had tendency to be larger than the experimental data in the high energy region. We introduced an adjustable parameter for correcting the spectrum calculation. The method gives a good agreement between calculated and experimental spectra. 相似文献
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基于Unscented卡尔曼滤波器(UKF)对反应堆周期的计算算法进行了研究,给出了相应的反应堆周期计算算法,并使用仿真和实验数据对算法进行了验证。结果表明:提出的基于UKF的反应堆周期算法是可行的,可较好地抑制噪声对反应堆周期估算的影响,从而复现信号的本来特征。 相似文献