Research on Calculation Method of Leakage Rate of Graphite Gasket Seal

Jiang Lu; Fu Xiaolong; Zhang Liping; Zhang Ying; Yu Mingda; Tian Jun

doi:10.13832/j.jnpe.2023.01.0141

Volume 44 Issue 1

Feb. 2023

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Article Navigation > Nuclear Power Engineering > 2023 > 44(1): 141-147

Jiang Lu, Fu Xiaolong, Zhang Liping, Zhang Ying, Yu Mingda, Tian Jun. Research on Calculation Method of Leakage Rate of Graphite Gasket Seal[J]. Nuclear Power Engineering, 2023, 44(1): 141-147. doi: 10.13832/j.jnpe.2023.01.0141

Citation:

Jiang Lu, Fu Xiaolong, Zhang Liping, Zhang Ying, Yu Mingda, Tian Jun. Research on Calculation Method of Leakage Rate of Graphite Gasket Seal[J]. Nuclear Power Engineering, 2023, 44(1): 141-147. doi: 10.13832/j.jnpe.2023.01.0141

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Research on Calculation Method of Leakage Rate of Graphite Gasket Seal

doi: 10.13832/j.jnpe.2023.01.0141

Science and Technology on Reactor System Design Technology Laboratory, Nuclear Power Institute of China, Chengdu, 610213, China

Received Date: 2022-02-15
Rev Recd Date: 2022-08-30
Publish Date: 2023-02-15

Abstract

Abstract

In order to improve the seal analysis and design method of nuclear grade main equipment, a numerical analysis model of the seal is established based on the voltage regulator manhole seal structure, and the contact stress of the graphite gasket seal is analyzed and studied; The theoretical prediction model of graphite gasket seal mass leakage rate is established by combining the parallel circular plate flow model and porous medium seepage model; Based on the theoretical prediction model, the mass leakage rate under design conditions, test conditions and startup transient conditions is calculated, and the main influencing parameters are analyzed and discussed. The results show that the contact stress of the graphite gasket seal is uniformly distributed along the circumferential direction, while the contact stress in the radial middle region of the graphite ring is slightly lower than that on both sides of the graphite ring; In the transient state of rising temperature and pressure, the seal contact stress decreases with time, and the seal mass leakage rate is negatively correlated with the contact stress. Increasing the seal contact stress can reduce the mass leakage rate, but the efficiency decreases gradually. Reducing the roughness can significantly reduce the mass leakage rate.The analysis method in this paper can provide an important reference for seal leakage rate analysis and tightness evaluation of nuclear grade main equipment.
- Voltage regulator manhole,
- Graphite gasket,
- Sealing contact stress,
- Mass leakage rate

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References(11)

References

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