环境气氛对石墨球摩擦产粉及粉尘粒径粒形特征影响的研究

辐射防护 ›› 2025, Vol. 45 ›› Issue (4): 388-395.

环境气氛对石墨球摩擦产粉及粉尘粒径粒形特征影响的研究

郭丽潇^1,2, 黄淑龙¹, 张宇航¹, 刘莹³, 曹健³, 姜子琪³

1.中国辐射防护研究院,太原 030006;
2.西安交通大学,西安 710049;
3.华能山东石岛湾核电有限公司,山东荣成 264312

收稿日期:2025-02-17 发布日期:2025-07-28
作者简介:郭丽潇(1988—),男,2017年毕业于清华大学核能与核技术工程专业,工程硕士学位,副研究员。E-mail:glxxy0303@163.com
基金资助:
中国华能集团总部科技项目(HNKJ23-H23)。

Research on the effects of environmental atmosphere on graphite sphere frictional powder generation and the particle size and shape characteristics of graphite dust

GUO Lixiao^1,2, HUANG Shulong¹, ZHANG Yuhang¹, LIU Ying³, CAO Jian³, JIANG Ziqi³

1. China Institute for Radiation Protection, Taiyuan 030006;
2. Xi'an Jiaotong Univsrsity, Xi'an 710049;
3. Huaneng Shandong Shidaobay Nuclear Power Co., Ltd., Shandong Rongcheng 264312

Received:2025-02-17 Published:2025-07-28

摘要/Abstract

摘要： 通过自主设计的摩擦磨损实验,针对高温气冷堆核电站示范工程(HTR-PM)使用的同工艺、同材质石墨球开展了不同气氛环境条件下石墨球的摩擦磨损行为研究,并对石墨粉尘的粒径、粒形等物理性质进行了表征。结果表明,与空气相比,氦气气氛中摩擦形式以磨粒磨损为主,石墨粉尘在氦气气氛中产生的颗粒数量更多,但粒径更小;石墨球表面摩擦掉粉量和掉粉率与气氛无明显相关,主要与初始表面粗糙度直接相关,一颗石墨球的平均最大掉粉量约为160 mg;摩擦产生的石墨粉尘颗粒为鳞片状,石墨粉尘的球形度中值为0.84,长径比中值为0.61。

关键词: 高温气冷堆, 石墨粉尘, 摩擦磨损

Abstract: In order to explore the frictional powder generation mechanism of graphite dust in high-temperature gas cooled reactors, reveal the influence of atmospheric environment on the characteristics of graphite dust generation, and to optimize the operational safety of high-temperature gas cooled reactors, the friction and wear behavior of graphite balls using the same process and material as those used in the HTR-PM commercial high-temperature gas cooled demonstration reactor was carried out under different atmospheric conditions, through self-designed friction and wear tests, and the physical properties such as particle size and shape of graphite dust were characterized. The results show that the friction mode in helium atmosphere is mainly abrasive wear, and graphite dust produces more particles in helium atmosphere, but the particle size distribution is relative small. The frictional powder production on the surface of graphite spheres is directly related to surface roughness, with an average maximum powder loss of about 160 mg per graphite sphere. The graphite dust particles generated by friction are flake like, with a median sphericity of 0.84 and a median aspect ratio of 0.61.

Key words: high temperature gas cooled reactor, graphite dust, friction and wear

中图分类号:

TL77

郭丽潇, 黄淑龙, 张宇航, 刘莹, 曹健, 姜子琪. 环境气氛对石墨球摩擦产粉及粉尘粒径粒形特征影响的研究[J]. 辐射防护, 2025, 45(4): 388-395.

GUO Lixiao, HUANG Shulong, ZHANG Yuhang, LIU Ying, CAO Jian, JIANG Ziqi. Research on the effects of environmental atmosphere on graphite sphere frictional powder generation and the particle size and shape characteristics of graphite dust[J]. RADIATION PROTECTION, 2025, 45(4): 388-395.

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