摘要
本文以田湾核电厂VVER堆芯为参考对象,通过调整燃料棒栅距模拟组件弯曲变形,从而定量分析燃料组件的变形对象限功率倾斜的影响。研究表明:栅距变化引起的慢化效应和能谱变化引起的核素效应是导致组件反应性变化的关键因素,随燃耗加深而逐渐变形的燃料组件通过上述两个因素的共同作用来影响堆芯象限功率倾斜。
In this article,The effect of fuel assembly deformation on the quadrant power tilt（QPT） was simulated using a studying object of VVER of Tianwan Nuclear Power Station（TNPS）.By varying pitch values between fuel rods,fuel assembly deformation was simulated accordingly and thus its impact on QPT was investigated quantitatively.The simulation results show that moderation effect and nuclide effect are key contributors to the unbalanced fuel reactivity causing QPT indirectly.
出处
《原子能科学技术》
EI
CAS
CSCD
北大核心
2013年第B06期79-82,共4页
Atomic Energy Science and Technology
关键词
象限功率倾斜
组件变形
慢化效应
核素效应
quadrant power tilt
assembly deformation
moderation effect
nuclide effect
