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Simulation for Startup Transients in a Natural Circulation Boiling Loop

[+] Author Affiliations
S. P. Lakshmanan, Manmohan Pandey

Indian Institute of Technology-Guwahati, Guwahati, India

P. Pradeep Kumar, Kannan N. Iyer

Indian Institute of Technology-Bombay, Mumbai, India

Paper No. ICONE16-48406, pp. 397-402; 6 pages
  • 16th International Conference on Nuclear Engineering
  • Volume 3: Thermal Hydraulics; Instrumentation and Controls
  • Orlando, Florida, USA, May 11–15, 2008
  • Conference Sponsors: Nuclear Engineering Division
  • ISBN: 0-7918-4816-7 | eISBN: 0-7918-3820-X
  • Copyright © 2008 by ASME


Startup of natural circulation boiling water reactors is of current interest due to the transients that occur at low pressure and low power conditions. Numerical simulation can be a useful tool for studying startup transients and for devising appropriate startup procedure. In the present work, a numerical model of an experimental test facility has been developed with RELAP5/MOD3.4. This model has been used to devise a startup procedure, which has been successfully implemented in the test facility. Numerical simulations for the startup transients have been done with the RELAP5 model and results have been compared with experimental findings. The nature of oscillations predicted by numerical simulations is similar to that observed in the experiment. This study demonstrated one possible method for developing startup procedures for natural circulation boiling water reactors.

Copyright © 2008 by ASME



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