Graphite dust resuspension in an HTR-10 steam generator--颗粒学报PARTICUOLOGY

Peng, W., Zhang, T., Zhen, Y., & Yu, S. (2014). Graphite dust resuspension in an HTR-10 steam generator. Particuology, 17, 149–157. https://doi.org/10.1016/j.partic.2013.12.006

Graphite dust resuspension in an HTR-10 steam generator

Wei Peng ^a, Tianqi Zhang ^a, Yanan Zhen ^a, Suyuan Yu ^b *

a Institute of Nuclear and New Energy Technology of Tsinghua University, Key Laboratory of Advanced Reactor Engineering and Safety of Ministry of Education, Beijing 100084, China
b Center for Combustion Energy, Key Laboratory for Thermal Science and Power Engineering of Ministry of Educations, Department of Thermal Engineering, Tsinghua University, Beijing 100084, China

10.1016/j.partic.2013.12.006

Volume 17, December 2014, Pages 149-157

Received 9 April 2013, Revised 28 November 2013, Accepted 22 December 2013, Available online 23 March 2014.

E-mail: suyuan@tsinghua.edu.cn

Highlights

• Friction velocity in windward and leeward of heat transfer tube is lower, but higher at its sides.

• Particles less than 1 μm are difficult to remove with helium from heat transfer tube surfaces.

• Particles larger than 1 μm exhibit different resuspension behavior in the steam generator.

Abstract

Graphite dust has an important effect on the safety of high-temperature gas-cooled reactors (HTR). The flow field in the steam generator was studied by the computational fluid dynamics (CFD) method, with the results indicating that the friction velocity in the windward and the leeward of the heat transfer tubes is relatively low and is higher at the sides. Further analysis of the resuspension of graphite dust indicates that the resuspension fraction reaches nearly zero for particles with a diameter less than 1 μm, whereas it will increases as the helium velocity in the steam generator increases for particle size larger than 1 μm. Moreover, the resuspension fraction increases as the particle size increases. The results also indicate that resuspension of the particles with sizes larger than 1 μm exhibited obvious differences in different parts of the steam generator.

Graphical abstract

Keywords

Graphite dust; High-temperature gas-cooled reactor (HTR); Steam generator; Resuspension

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