Bond graph representation of nuclear reactor point kinetics and nearly incompressible thermal hydraulics
Name
SosnovskyForget_Bond Graph Representation of Nuclear Reactor Point Kinet....pdf
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1.22 MB
Format
Adobe PDF
Checksum (MD5)
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Author(s)
Sosnovsky, Eugeny
Forget, Benoit
Date Issued
January 2014
Journal
Annals of Nuclear Energy
Publisher
Elsevier
Citation
Sosnovsky, Eugeny and Benoit Forget. "Bond graph representation of nuclear reactor point kinetics and nearly incompressible thermal hydraulics." Annals of Nuclear Energy 68 (June 2014): 15-29.
Version
Author's final manuscript
Abstract
This work presents a simplified 1D model for a pressurized water reactor core, suitable for very rapid transients like control rod ejection. The model is represented using the bond graph formalism, a technique for modeling engineering systems as combinations of connected elements. Bond graphs are a flexible way of presenting coupled physics problems by automating the computer science aspects of modeling and letting the modelers focus on the physics; they were introduced in earlier work. To help leverage the flexibility of bond graph representations of physical systems, a new bond graph processing code, BGSolver, is introduced. BGSolver has been developed by the authors over the past several years, and is now released as open source software. A rapid rod ejection benchmark is solved with both BGSolver and RELAP5-3D; BGSolver obtained full convergence with a 5 ms time step, while RELAP5-3D required a 1 ms time step, due to the fully coupled time integration that BGSolver employed, compared to an operator splitting-based time integrator of RELAP5-3D. BGSolver’s time integrator demonstrated 3rd-order convergence in time, a very desirable property. A single nonlinear solve was used to obtain the steady state with BGSolver.
MIT Department
Massachusetts Institute of Technology. Department of Nuclear Science and Engineering
Terms of Use
Creative Commons Attribution-NonCommercial-NoDerivs License
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DOI of Published Version
https://doi.org/10.1016/j.anucene.2013.12.013
