Development of transport solutions for DYN3D. Current status.

An outline of current status of development of transport solutions for pin-power reconstruction in DYN3D is presented. Presently, an advanced method of current coupling collision probability with flux expansion in zones is being developed and tested for cylindrical geometry. Results of test calculations for cylindrical cell shows very good agreement with the results obtained with Monte Carlo method. This very convincing results encourage the development of a two dimensional solver and the implementation of this advanced pin power calculation method into DYN3D as further steps.