首页> 外文期刊>Nuclear Engineering and Design >Characterization of graphite dust produced by pneumatic lift
【24h】

Characterization of graphite dust produced by pneumatic lift

机译:气动举升产生的石墨粉尘的表征

获取原文
获取原文并翻译 | 示例
       

摘要

Graphite dust is an important safety concern of high-temperature gas-cooled reactor (HTR). The graphite dust could adsorb fission products, and the radioactive dust is transported by the coolant gas and deposited on the surface of the primary loop. The simulation of coagulation, aggregation, deposition, and resuspension behavior of graphite dust requires parameters such as particle size distribution and particle shape, but currently very limited data on graphite dust is available. The only data we have are from AVR and THTR-300, however, the AVR result is likely to be prejudiced by the oil ingress. In pebble-bed HTR, graphite dust is generally produced by mechanical abrasion, in particular, by the abrasion of graphite pebbles in the lifting pipe of the fuel handling system. Here we demonstrate the generation and characterization of graphite dust that were produced by pneumatic lift. This graphite dust could substitute the real dust in HTR for characterization. The dust, exhibiting a lamellar morphology, showed a number-weighted average particle size of 2.38 mu m and a volume-weighted average size of 14.62 mu m. These two sizes were larger than the AVR and THTR results. The discrepancy is possibly due to the irradiation effect and prejudice caused by the oil ingress accident. It is also confirmed by the Raman spectrum that both the filler particle and binder contribute to the dust generation. (C) 2016 Elsevier B.V. All rights reserved.
机译:石墨粉尘是高温气冷堆(HTR)的重要安全问题。石墨粉尘可能吸附裂变产物,放射性粉尘由冷却剂气体传输并沉积在一次回路的表面上。石墨粉尘的凝结,聚集,沉积和再悬浮行为的模拟需要诸如粒度分布和颗粒形状之类的参数,但是目前关于石墨粉尘的数据非常有限。我们仅有的数据来自AVR和THTR-300,但是,AVR的结果可能会因进油而受到影响。在卵石床HTR中,通常通过机械磨损,特别是通过燃料处理系统的提升管中的石墨卵石的磨损产生石墨粉尘。在这里,我们演示了气动举升产生的石墨粉尘的产生和特性。这种石墨粉尘可以代替HTR中的真实粉尘进行表征。表现为层状形态的粉尘的数加权平均粒径为2.38μm,体积加权平均粒径为14.62μm。这两个大小均大于AVR和THTR结果。差异可能是由于进油事故引起的辐照效果和偏见。拉曼光谱也证实了填料颗粒和粘合剂均有助于产生粉尘。 (C)2016 Elsevier B.V.保留所有权利。

著录项

  • 来源
    《Nuclear Engineering and Design》 |2016年第8期|104-109|共6页
  • 作者单位

    Tsinghua Univ, Grad Sch Shenzhen, Guangdong Prov Key Lab Thermal Management Engn &, Shenzhen 518055, Guangdong, Peoples R China;

    Tsinghua Univ, Inst Nucl & New Energy Technol, Adv Nucl Energy Technol Cooperat Innovat Ctr, Key Lab Adv Nucl Engn & Safety,Minist Educ, Beijing 100084, Peoples R China;

    Tsinghua Univ, Inst Nucl & New Energy Technol, Adv Nucl Energy Technol Cooperat Innovat Ctr, Key Lab Adv Nucl Engn & Safety,Minist Educ, Beijing 100084, Peoples R China;

    Tsinghua Univ, Grad Sch Shenzhen, Guangdong Prov Key Lab Thermal Management Engn &, Shenzhen 518055, Guangdong, Peoples R China;

    Tsinghua Univ, Inst Nucl & New Energy Technol, Adv Nucl Energy Technol Cooperat Innovat Ctr, Key Lab Adv Nucl Engn & Safety,Minist Educ, Beijing 100084, Peoples R China;

    Tsinghua Univ, Inst Nucl & New Energy Technol, Adv Nucl Energy Technol Cooperat Innovat Ctr, Key Lab Adv Nucl Engn & Safety,Minist Educ, Beijing 100084, Peoples R China;

    Tsinghua Univ, Minist Educ, Key Lab Thermal Sci & Power Engn, Ctr Combust Energy, Beijing 100084, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

  • 入库时间 2022-08-18 00:41:54

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号