Numerical Investigation of the Transient Behavior of a Hot Gas Duct under Rapid Depressurization

A hot gas duct is an indispensable component for the nuclear-process heat applications of the Very-High-Temperature Reactor (VHTR), which has to fulfill three requirements: to withstand high temperature, high pressure, and large pressure transient. In this paper, numerical investigation of pressure...

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Bibliographic Details
Published in:Science and technology of nuclear installations 2016-01, Vol.2016 (2016), p.1-8
Main Authors: Duan, Ri-Qiang, Ma, Tao, Jiang, Shengyao, Liu, JingBao
Format: Article
Language:English
Subjects:
Damage
Depressurization
Ducts
Insulation
Mathematical models
Reactors
Structural members
Tightness
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Summary:A hot gas duct is an indispensable component for the nuclear-process heat applications of the Very-High-Temperature Reactor (VHTR), which has to fulfill three requirements: to withstand high temperature, high pressure, and large pressure transient. In this paper, numerical investigation of pressure transient is performed for a hot gas duct under rapid depressurization. System depressurization imposes an imploding pressure differential on the internal structural elements of a hot gas duct, the structural integrity of which is susceptible to being damaged. Pressure differential and its imposed duration, which are two key factors to evaluate the damage severity of a hot gas duct under depressurization, are examined in regard to depressurization rate and insulation packing tightness. It is revealed that depressurization rate is a decisive parameter for controlling the pressure differential and its duration, whereas insulating-packing tightness has little effect on them.
ISSN:1687-6075
1687-6083
DOI:10.1155/2016/6858425