Analysis on thermophoretic deposit of fine particle on water wall of 10 MW high temperature gas-cooled reactor

MISCELLANEOUS

Analysis on thermophoretic deposit of fine particle on water wall of 10 MW high temperature gas-cooled reactor

ZHOU Tao，

YANG Rui-Chang，

JIA Dou-Nan

Nuclear Science and Techniques

Vol.16, No.1

pp.46-52

Published in print 01 Feb 2005

CLC：TL364

33700

The water wall is an important part of the passive natural circulation residual heat removal system in a high temperature gas-cooled reactor. The maximum temperatures of the pressure shell and the water wall are calculated using annular vertical closed cavity model. Fine particles can deposit on the water wall due to the thermophoresis effect. This deposit can affect heat transfer. The thermophoretic deposit efficiency is calculated by using Batch and Shen's formula fitted for both laminar flow and turbulent flow. The calculated results indicate that natural convection is turbulent in the closed cavity. The transient thermophoretic deposit efficiency rises with the increase of the pressure shell's temperature. Its maximum value is 14%.

High temperature gas-cooled reactorWater wallFine particlesThermophoretic deposit

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