On the Build-Up Factor from the Multi-Group Neutron Diffusion Equation with Cylindrical Symmetry

Julio Cesar Lombaldo Fernandes, Marco Túllio Vilhena, Bardo Ernst Bodmann, Volnei Borges
2013 World Journal of Nuclear Science and Technology  
We consider the time dependent neutron diffusion equation for one energy group in cylinder coordinates, assuming translational symmetry along the cylinder axis. This problem for a specific energy group is solved analytically applying the Hankel transform in the radial coordinate r. Our special interest rests in the build-up factor for a time dependent linear neutron source aligned with the cylinder axis, which in the limit of zero decay constant reproduces also the static case. The new approach
more » ... e. The new approach to solve the diffusion equation by integral transform technique is presented and results for several parameter sets and truncation in the solution for the flux and build-up factor are shown and found to be compatible to those of literature [1, 2] .
doi:10.4236/wjnst.2013.31001 fatcat:kaxxmmw6vvfhxhgpcu37qgazga