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Research Papers: Fluid-Structure Interaction

Influence of Material Parameters and Thermal Parameters on Sealing Performance of Reactor Pressure Vessel Under Heat Focusing Effect

[+] Author and Article Information
Jingyi Tian, Yuxiao Kuang

School of Mechanical Engineering,
Beijing Institute of Technology,
Beijing 100081, China

Huihua Feng

School of Mechanical Engineering,
Beijing Institute of Technology,
Beijing 100081, China
e-mail: fenghh@bit.edu.cn

Ye Yang

Qing Gong College,
North China University of
Science and Technology,
Tangshan 063000, China

Junming Liang, Huiyong Zhang

China Nuclear Power Technology
Research Institute Co., Ltd,
Shenzhen 518000, China

1Corresponding author.

Contributed by the Pressure Vessel and Piping Division of ASME for publication in the JOURNAL OF PRESSURE VESSEL TECHNOLOGY. Manuscript received September 17, 2018; final manuscript received April 28, 2019; published online May 24, 2019. Assoc. Editor: Marwan A. Hassan.

J. Pressure Vessel Technol 141(4), 041302 (May 24, 2019) (11 pages) Paper No: PVT-18-1195; doi: 10.1115/1.4043682 History: Received September 17, 2018; Revised April 28, 2019

In this paper, an effective numerical model is established by combining the fluid–structure coupling and thermomechanical coupling methods to solve complex sealing problems of a reactor pressure vessel (RPV) test simulator under heat focusing effect. Some key factors are considered in the structure and thermal analysis, such as contact nonlinearity, high temperature elastic–plastic, and high temperature compression–resilience performance. The simulation results agree well with the data of test. An analysis is performed to study the effects of material and thermal parameters on sealing performance. The stress and deformation mechanism of bolt flange and gasket connection system is clarified.

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Figures

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Fig. 1

RPV test simulator sealing performance simulation method under the heat focusing effect

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Fig. 2

RPV test simulator finite element model

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Fig. 3

Material characteristic curve at different temperatures: (a) gasket and (b) copper head

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Fig. 4

Computational fluid dynamics simulation model and results: (a) fluid–structure coupling model, (b) temperature of the head, (c) heat flow of external surface, and (d) steam volume outside the head

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Fig. 5

Fluid–solid interface heat transfer

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Fig. 6

Results analysis: (a) temperature simulation results and (b) gaskets contact pressure simulation results

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Fig. 8

Test devices: (a) RPV test simulator and (b) flexible graphite gaskets

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Fig. 9

Comparison of copper head temperature between simulation results and test results

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Fig. 10

Results under different material parameters: (a) three different material parameters of flexible graphite gaskets and (b) comparison of contact pressure results

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Fig. 11

Results under different thermal parameters: (a) maximum temperature of gaskets and (b) maximum and minimum contact pressure

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Fig. 12

Contact pressure of gaskets at different thermal parameters: (a) thermal parameters A, (b) thermal parameters B, and (c) thermal parameters C

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Fig. 13

Deformation relationship between gasket, bolt, and flange

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Fig. 14

Flange deflection angle of stainless steel cylinder under different thermal parameters

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Fig. 15

Deformation of gasket, bolt, and flange under different thermal parameters

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Fig. 16

Axial compression results of gasket under different thermal parameters: (a) inner and outer nodes and (b) radial nodes

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