The moderator in the Calandria of a CANada Deuterium Uranium (CANDU) reactor serves as a backup heat sink in a Loss of Coolant Accident (LOCA) combined with a Loss of Emergency Coolant Injection (LOECI) accident scenario. This requires that the heat from the fuel be transferred through the ballooned/sagged Pressure Tube and the contacted Calandria Tube (CT) to the moderator. Increasing the heat transfer to the moderator will enhance the safety of the reactor by increasing the margin to Calandria Tube Rupture and ensuring the fuel is cooled. Conceptual designs were assessed to determine their potential for increasing heat transfer to the moderator in accident scenarios. Three different design options for a CT have been investigated using numerical simulation techniques. The CT design options include fins or ribs of different sizes and combinations. The fins and ribs provide improved heat transfer. Analyses results have shown that the design options yield an increased heat transfer with a minimal impact on moderator flow. The analysis has determined that the ribbed design option is superior in terms of heat transfer enhancement.
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17th International Conference on Nuclear Engineering
July 12–16, 2009
Brussels, Belgium
Conference Sponsors:
- Nuclear Engineering Division
ISBN:
978-0-7918-4354-3
PROCEEDINGS PAPER
Heat Transfer Assessment of Calandria Tube Enhancement Design Options Available to Purchase
Daniel M. Hobbs,
Daniel M. Hobbs
University of Ontario Institute of Technology, Oshawa, ON, Canada
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Allan M. Freeburn,
Allan M. Freeburn
University of Ontario Institute of Technology, Oshawa, ON, Canada
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Richard C. Scrannage,
Richard C. Scrannage
University of Ontario Institute of Technology, Oshawa, ON, Canada
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Farshad Sani,
Farshad Sani
University of Ontario Institute of Technology, Oshawa, ON, Canada
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Glenn D. Harvel
Glenn D. Harvel
University of Ontario Institute of Technology, Oshawa, ON, Canada
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Daniel M. Hobbs
University of Ontario Institute of Technology, Oshawa, ON, Canada
Allan M. Freeburn
University of Ontario Institute of Technology, Oshawa, ON, Canada
Richard C. Scrannage
University of Ontario Institute of Technology, Oshawa, ON, Canada
Farshad Sani
University of Ontario Institute of Technology, Oshawa, ON, Canada
Glenn D. Harvel
University of Ontario Institute of Technology, Oshawa, ON, Canada
Paper No:
ICONE17-75601, pp. 557-563; 7 pages
Published Online:
February 25, 2010
Citation
Hobbs, DM, Freeburn, AM, Scrannage, RC, Sani, F, & Harvel, GD. "Heat Transfer Assessment of Calandria Tube Enhancement Design Options." Proceedings of the 17th International Conference on Nuclear Engineering. Volume 4: Codes, Standards, Licensing and Regulatory Issues; Student Paper Competition. Brussels, Belgium. July 12–16, 2009. pp. 557-563. ASME. https://doi.org/10.1115/ICONE17-75601
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