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Structural Redundancy Design and Reliability Analysis of Magnetic Bearing for HTGR Primary Helium Circulator

[+] Author Affiliations
Yangbo Zheng, Zhengang Shi, Xingnan Liu, Ni Mo, Guojun Yang

Tsinghua University, Beijing, China

Paper No. ICONE26-81336, pp. V004T06A011; 10 pages
doi:10.1115/ICONE26-81336
From:
  • 2018 26th International Conference on Nuclear Engineering
  • Volume 4: Nuclear Safety, Security, and Cyber Security; Computer Code Verification and Validation
  • London, England, July 22–26, 2018
  • Conference Sponsors: Nuclear Engineering Division
  • ISBN: 978-0-7918-5146-3
  • Copyright © 2018 by ASME

abstract

As primary pump of High Temperature Gas-cooled Rector (HTGR), the safety and reliability of primary helium circulator has a direct relationship with heat export in the reactor core. This paper proposed two conceptual design methods, which are structural redundancy design in the axial and radial magnetic bearings (coils), and crossing redundancy design between amplifiers and the redundant bearings (coils), combined with the characteristics of magnetic bearing in the primary helium circulator. Then we built Markov model for the magnetic bearing with redundant structure, which was used to reliability analysis and calculation. Finally, we performed simulation of the redundant magnetic bearings in Matlab/Simulink. The results show that the redundant structure design can greatly improve the reliability of the magnetic bearing system. Therefore, these methods would provide a new approach for further improving the safety and reliability of primary helium circulator.

Copyright © 2018 by ASME

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