Computational study of the moderator flow in calandria vessel of a heavy water reactor is carried out for three different inlet nozzle configurations. For the computations, PHOENICS CFD code is used. The flow and temperature distribution for all the configurations are determined. The impact of moderator inlet jets on adjacent calandria tubes is studied. Based on these studies, it is found that the inlet nozzles can be designed in such a way that it can keep the impact velocity on calandria tubes within limit while keeping maximum moderator temperature well below its boiling limit.

Volume Subject Area:
Computational Fluid Dynamics (CFD), Neutronics Methods and Coupled Codes
Keywords:
Moderator flow, Impact velocity, CFD
Topics:
Computational fluid dynamics, Flow (Dynamics), Heavy water reactors, Temperature distribution, Nozzles, Boiling, Computation, Jets, Temperature, Vessels
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Copyright © 2008
 by ASME
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