阶跃反应性扰动及温度变化下压水堆堆芯响应特性的-南华大学学报.PDF

第29卷第1期 南华大学学报(自然科学版) Vol郾29 No郾1 2015年3月 Journal of University of South China(Science and Technology) Mar郾2015 文章编号:1673-0062(2015)01-0016-06 阶跃反应性扰动及温度变化下压水堆堆芯响应 特性的SIMULINK仿真 1 1* 2 1 何丽华 ,于摇 涛 ,郑平卫 ,刘紫静 (1.南华大学 核科学技术学院,湖南 衡阳421001;2.南华大学 环境保护与安全工程学院,湖南 衡阳421001) 摘摇 要:阐述了压水堆堆芯的数学模型,基于SIMULINK 计算仿真工具,建立了相应 的仿真模型,并进行了仿真计算.结果表明:不考虑中毒效应,引入反应性阶跃扰动和 冷线温度扰动,由于温度效应的负反馈作用,中子密度、燃料温度和冷却剂温度能够 到达一个新的平衡,核反应堆具有内在的自稳定性.考虑中毒效应后,反应堆受到的 扰动减少,有利于反应堆的自稳定性. 关键词:堆芯建模;温度效应;动态特性;SIMULINK 中图分类号:TL365;TP391.9摇 摇 摇 文献标识码:B Simulink Simulation of the Response Characteristic inthe PressurizedWater Reactor Core to Step Reactivity Disturbance and Temperature Change 1 1* 2 1 HE Li鄄hua ,YU Tao ,ZHEN Ping鄄wei ,LIU Zi鄄jing (1.School of Nuclear Science and Technology,University of South China,Hengyang,Hunan421001,China; 2.School of Environmental Protection and Safety Engineering,University of South China, Hengyang,Hunan421001,China) Abstract:The mathematical model of the PWR core is expounded.Based on SIMULINK tool,the corresponding simulation model is established,and the mode is simulated.The a鄄 nalysis results show that:regardless of the poisoning effects,importing reactivity step dis鄄 turbance and cold line temperature disturbance,due to the effect of negative feedback of the temperature effect,neutron density,fuel temperature and coolant temperature canreach a new equilibrium.The nuclear reactor has intrinsic stability. Considering the poisoning effects,reactor isfewer disturbed,which is beneficial to the stability of the reactor.