International Conference on Mathematics and Computational Methods Applied to Nuclear Science and Engineering (M&C 2011)
As an efficient and stable direct whole core calculation method, an adaptive cell homogenized
cross section functionalization scheme is established using the decoupled planar MOC solutions.
The cross section function is to be used in the subsequent three-dimensional (3-D) coarse mesh
finite difference (CMFD) calculation which is to perform the 3-D flux and temperature
calculations without invoking MOC calculations. To ensure the axial solution accuracy in the 3-D
CMFD solution, the source expansion nodal method (SENM) based simplified P3 equation is
introduced in an improved form involving a whole one-dimensional domain coupled axial SP3
nodal solution. The accuracy of the new axial SP3 nodal method is examined by solving the
C5G7MOX rodded benchmark problem. The performance of the decoupled planar MOC solution
based cross section functionalization scheme is then assessed through a set of PWR model
problems involving significant thermal feedback.
