燃料组件边角栅元偏离泡核沸腾比分析  

DNBR Analysis of Fuel Assembly Side and Corner Channels

作　　者：许志红[1] 王喆[1] 杨萍[1] 史国宝[1] 

机构地区：[1]上海核工程研究设计院,上海200233

出　　处：《核安全》2016年第2期84-88,94,共6页Nuclear Safety

基　　金：上海科学技术委员会资助课题;项目编号13DZ2250200

摘　　要：燃料组件边角栅元的阻力系数大于典型栅元和冷壁栅元。本文基于标准子通道模型,通过调整子通道模拟区域的位置,修改了通道、燃料棒以及格架阻力等相关参数,直接模拟燃料组件边角栅元的综合效应,进行偏离泡核沸腾比(Departure from Nuclear Boiling Ratio,简称DNBR)分析。分析结果表明:边角栅元的偏离泡核沸腾比能被典型和冷壁栅元的计算结果所包络。本文同时对燃料组件间隙和边角栅元的偏离泡核沸腾比的影响进行了进一步分析。The loss coefficient of side and corner channels of fuel assembly is greater than that of the typical and thimble channels.Based on the standard sub-channel model,DNBR analysis of the side and corner channels is conducted by adjusting the sub-channel modeling position,and updating the parameters of related channels,rods and grid loss coefficient,as well as directly simulating the side and corner channels.The result indicates that DNBR of the side and corner channels can be enveloped by that of the typical and thimble channels.This paper further analyzes the impact of fuel assembly pitch toleranceon the side and corner channel DNBR.

关 键 词：燃料组件 边角栅元 偏离泡核沸腾比 

分 类 号：TL429[核科学技术—核技术及应用]