赵 颖　朱兴望　曲世祥　陈 堃（中国科学院上海应用物理研究所 嘉定园区　上海 20800）2（中国科学院大学　北京 00049）



球形燃料元件累积旋转角度和角速度问题研究

赵 颖1,2朱兴望1曲世祥1陈 堃1
1（中国科学院上海应用物理研究所 嘉定园区上海 201800）2（中国科学院大学北京 100049）

摘要球床堆采用球形燃料元件，其在循环过程中存在滚动磨损以及滑动磨损并产生石墨粉尘。本文借助一种球形无线探测系统量化了角速度及累计旋转角度，并量化了滚动磨损对石墨粉尘产生的影响。实验结果表明，累计旋转角度和角速度与初始径向位置有关，随着初始径向位置由里向外，呈V字型分布，与仓筒边壁接触的球累计旋转角度和角速度远大于其他位置，边壁滚动效应显著。计算结果表明，滚动磨损对石墨粉尘产生量的贡献在11%-27%，且靠近仓筒边壁处该百分比高于其他位置，边壁效应明显。一般情况下，滚动磨损产生石墨粉尘量要低于滑动磨损产生的石墨粉尘量，以往在估算球床堆中的石墨粉尘量时，只考虑滑动磨损而忽略滚动磨损，会导致石墨粉尘的估算偏高。

关键词球形燃料元件，累计旋转角度，角速度，滚动磨损，球形无线探测系统

中国科学院战略性先导科技专项项目(No.XDA02050100)资助

第一作者：赵颖，女，1989年出生，2011年毕业于山东建筑大学，现为博士研究生，研究领域为短距离无线通信、微电子及球床堆堆芯颗粒流

Supported by Strategic Priority Research Program of Chinese Academy of Sciences(No.XDA02050100)

First author:ZHAO Ying,female,born in 1989,graduated from Shandong Architecture University in 2011,doctor student,focusing on short-range wireless communication technique,microelectronics,granular dynamics in pebble bed reactor cores

Rotation angles and angular velocities study of pebble-shaped fuel element based on a detection system

ZHAO Ying1,2ZHU Xingwang1QU Shixiang1CHEN Kun1
1(Shanghai Institute of Applied Physics,Chinese Academy of Sciences,Jiading Campus,Shanghai 201800,China)2(University of Chinese Academy of Sciences,Beijing 100049,China)

AbstractBackground:Pebble Bed Reactor(PBR),most often used in Generation IV high-temperature gas-cooled nuclear reactor,employs pebble-shaped fuel elements.As pebbles flow through the reactor,they will slide and rotate against each other and the wall,causing generation of graphite dust.Purpose:This study aims to investigate the rotation angles and angular velocities of pebble-shaped fuel elements(PSFE).Methods:The rotation angle and angular velocity were studied by using a simulated transparent cylinder to replace the reactor core.A pebble-shaped detection system is employed to test the angular velocities and accumulated rotation angles of PSFEs with wireless interface.The generation of graphite particles by rotational abrasion was also studied.Results:The experimental results show that the initial seeding position has influence on rotation angles and angular velocities.The distribution of rotation angles and angular velocities from the center to the wall can be described as an inverted V-type distribution.The calculation results show that wear mass by rotation accounts for 11%-27%of the total graphite dust.Conclusion:Sliding abrasion is stronger than rotation abrasion in general,graphite generation tends to be overestimated if we only take sliding abrasion into consideration and ignore rotation abrasion.

Key wordsPebble-shaped fuel element,Rotation angles,Angular velocity,Rotation abrasion,Pebble-shaped detector system

球床堆是一种采用球形燃料元件的反应堆，冷却剂一般采用气体或熔盐[1]。……