@inproceedings{c2464ec7285e48e39a09c044fce0083d,

title = "Multiphysics simulations for LWR analysis",

abstract = "Accurate prediction of the neutron and temperature distributions within an operating nuclear reactor requires the solution of multiple coupled physics equations. In a light water reactor (LWR), there is a very strong coupling between the power distribution (described by the radiation transport equation) and the temperature and density distributions (described by a thermal diffusion equation in combination with a fluid flow model). This study aims to begin to quantify the impact of such feedback mechanisms as well as identify numerical difficulties associated with such multiphysics problems. A description of the multiphysics model and current solution strategy within the Exnihilo code package for coupling between 3-D radiation transport and 3-D heat transfer is given. Numerical results detailing the effects of varying the nature of the coupling and the impact of mesh refinement for a representative 3×3 pressurized water reactor (PWR) {"}mini-assembly{"} are presented.",

keywords = "Multi-physics, Radiation transport",

author = "S. Hamilton and K. Clarno and M. Berrill and T. Evans and G. Davidson and R. Lefebvre and R. Sampath and J. Hansel and J. Ragusa and C. Josey",

year = "2013",

language = "English",

isbn = "9781627486439",

series = "International Conference on Mathematics and Computational Methods Applied to Nuclear Science and Engineering, M and C 2013",

pages = "1797--1808",

booktitle = "International Conference on Mathematics and Computational Methods Applied to Nuclear Science and Engineering, M and C 2013",

note = "International Conference on Mathematics and Computational Methods Applied to Nuclear Science and Engineering, M and C 2013 ; Conference date: 05-05-2013 Through 09-05-2013",

}