Bond graphs for spatial kinetics analysis of nuclear reactors

作者：Sosnovsky Eugeny^*; Forget Benoit

来源：Annals of Nuclear Energy, 2013, 56: 208-226.

DOI：10.1016/j.anucene.2013.01.012

• Reactor multiphysics
• Bond graphs
• Spatial kinetics
• Full coupling

This work proposes a simple and effective approach to modeling nuclear reactor multiphysics problems using bond graphs. The bond graph formalism is a technique for modeling engineering systems as combinations of connected elements. After the bond graph representation of a multiphysics system is constructed, it can be automatically converted into a state derivative vector and integrated. Bond graphs are a flexible way of presenting coupled physics problems by automating the computer science aspects of modeling and lettings the modelers focus on the physics.
Additionally, the representation of a multiport resistive element is presented, which is necessary for coupling more than two types of physics.
Bond graph representations of 2D multigroup neutron diffusion, delayed neutrons and thermal feedback were presented and tested using an LRA BWR control blade drop benchmark problem with a coarse mesh. The code demonstrated 3rd-order convergence in time, a very desirable property of fully coupled time integrators.

• 出版日期2013-6