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Rotation angles and angular velocities study of pebble-shaped fuel element based on a detection system
- NUCLEAR TECHNIQUES Vol. 39, Issue 3, Article number: 030603(2016)
- 作者机构：
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
- 作者简介：
- 基金信息：
DOI：10.11889/j.0253-3219.2016.hjs.39.030603
CLC： TL37Received：26 November 2015，
Accepted：2016-01-27，
Published：25 March 2016
- 稿件说明：
移动端阅览
Jianyu ZHU, Xuefeng XU, Jiahang SU, et al. Rotation angles and angular velocities study of pebble-shaped fuel element based on a detection system[J]. Nuclear techniques, 2016, 39(3): 030603
Jianyu ZHU, Xuefeng XU, Jiahang SU, et al. Rotation angles and angular velocities study of pebble-shaped fuel element based on a detection system[J]. Nuclear techniques, 2016, 39(3): 030603 DOI： 10.11889/j.0253-3219.2016.hjs.39.030603.
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。
Abstract
Background:
2
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:
2
This study aims to investigate the rotation angles and angular velocities of pebble-shaped fuel elements (PSFE).
Methods:
2
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:
2
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:
2
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.
关键词
Keywords
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