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The Study on Two Phase Instabilities in a Multi-Channel System

[+] Author Affiliations
Yuansheng Lin, Kelong Zhang, Zhiguo Wei, Zhouyang Liu, Rui Yu

Wuhan Second Ship Des. & Res. Ins., Wuhan, China

Paper No. ICONE24-60619, pp. V003T09A043; 5 pages
  • 2016 24th International Conference on Nuclear Engineering
  • Volume 3: Thermal-Hydraulics
  • Charlotte, North Carolina, USA, June 26–30, 2016
  • Conference Sponsors: Nuclear Engineering Division
  • ISBN: 978-0-7918-5003-9
  • Copyright © 2016 by ASME


Commonly two phase flow instabilities always occur in such multi-channel systems as nuclear reactor or steam generator. In this paper, the instabilities occurring in a system with four paralleled channels are investigated under forced flow condition. The system code Relap5 is used to simulate the phenomena in the system. The results show that the system may experience different types of flow oscillation with the increase of heating power uniformly. It is revealed that the thermal hydraulic parameter change dramatically in given channel during the oscillation. Three different heating cases are simulated and studied. The effect of inlet throttling on the stability is also studied and the difference of each channel is analyzed.

Copyright © 2016 by ASME



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