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The Research on Effects of the Medium Blocking on Motion Performances of Main Steam and Feed Water Isolation Valves With its Driving Device

[+] Author Affiliations
Dalei Pan, Hua Zhong, Shenjie Gu, Guangyue Guo, Hongbo Kuang

Shanghai Nuclear Engineering Research and Design Institute, Shanghai, China

Paper No. ICONE25-67258, pp. V001T04A032; 8 pages
doi:10.1115/ICONE25-67258
From:
  • 2017 25th International Conference on Nuclear Engineering
  • Volume 1: Operations and Maintenance, Engineering, Modifications, Life Extension, Life Cycle and Balance of Plant; I&C, Digital Controls, and Influence of Human Factors
  • Shanghai, China, July 2–6, 2017
  • Conference Sponsors: Nuclear Engineering Division
  • ISBN: 978-0-7918-5779-3
  • Copyright © 2017 by ASME

abstract

This article presents the study of the medium block effects on the driving device performances of main steam and feed water isolation valves, which are typical electromechanical equipment in nuclear power plants. The equipment simulation model is established, which can calculate motion performances under all working situations. The medium blocking force models during the motion of valves are established and the blocking effects on the driving device performances are calculated and analyzed. The simulation results show that the medium block has little effects on the opening performances of the driving device, while it has important effects on the closing performances, especially on the quick closing, which suggests that the equipment should be lubricated to reduce resistance coefficients and the main parameters of electromechanical equipment should be tuned and calibrated to guarantee the quick closing time.

Copyright © 2017 by ASME
Topics: Feedwater , Valves , Steam

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