An analytical solution for the consideration of the effect of adjacent fuel elements; extension to hexagonal fuel elements
21st Symposium of AER on VVER Reactor Physics and Reactor Safety (2011, Dresden, Germany)
Spectral and core calculations
Abstract
A new analytical method is described to deal with the Leakage Environmental Effect. The
method is based on the analytical solution of the two group diffusion equation for two adjacent
fuel assemblies avoiding the eigenvalue iteration by introduction of an external source. The
quality of the results for this highly efficient method is demonstrated for quadratic fuel
assemblies. In additional tests the transferability of the concept to hexagonal VVER-440 type
fuel assemblies is shown.