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Non-linear analysis of out-of-phase instabilities in advanced heavy water reactor

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Title Non-linear analysis of out-of-phase instabilities in advanced heavy water reactor
 
Creator BAHGA, SS
DOSHI, JB
 
Subject flow
bwr
stability
dynamics
ahwr
 
Description In this paper we study thermally induced instabilities in Indian Advanced Heavy Water Reactor (AHWR). One dimensional homogeneous equilibrium model has been used to simulate the two-phase flow. The nonlinear mass, momentum and energy conservation equations are solved along the characteristic directions by using implicit finite difference scheme. The virtue of this scheme is that it handles the boundary conditions naturally. This scheme is fast because the time steps can be greater than that given by Courant-Friedrichs-Levvy condition. The numerical scheme is sufficiently general and can handle axially varying heat flux and different combinations of inlet and exit boundary conditions of enthalpy, mass flux and pressure and multiple channels. No assumptions regarding constant properties and incompressibility have been taken. The one dimensional fuel heat transfer model was then coupled to the thermal-hydraulics model to analyze out-of-phase instabilities in AHWR. Out-of-phase oscillations are studied by considering two parallel boiling channels. Further effects of radial power distribution, inlet orificing and axial power distribution were considered.
 
Publisher AMER SOC MECHANICAL ENGINEERS
 
Date 2011-10-26T02:21:08Z
2011-12-15T09:11:25Z
2011-10-26T02:21:08Z
2011-12-15T09:11:25Z
2008
 
Type Proceedings Paper
 
Identifier PROCEEDINGS OF THE ASME INTERNATIONAL MECHANICAL ENGINEERING CONGRESS AND EXPOSITION 2007, VOL 8, PTS A AND B: HEAT TRANSFER, FLUID FLOWS, AND THERMAL SYSTEMS,1745-1754
978-0-7918-4302-4
http://dspace.library.iitb.ac.in/xmlui/handle/10054/15882
http://hdl.handle.net/100/2055
 
Source ASME International Mechanical Engineering Congress and Exposition,Seattle, WA,NOV 11-15, 2007
 
Language English