4. METHOD OF SOLUTION
The BURNY-5 code consists of the following routines:
RIBOT which calculates the isotopic evolution and the nuclear constants of each fuel cell type. The correlation method is systematically used.
'STRIFF' routine which calculates by correlation formulae the nuclear constants for the non-fuel regions, considered as a homogeneous mixture of water and structure materials.
'ROCCE' calculates the nuclear constants of Ag-In-Cd control cells by means of correlation formulae based on the results of THOMAS and FORM codes.
'CRUCOR' routine which calculates the blackness parameter and the equivalent nuclear constants of the treatment in diffusion theory of the B4C control rods.
'EXTERMINATOR' is used as x-y-extended diffusion routine for Keff and power distribution evaluation.
'MEDIA' routine for performing some edit preparation and averages for coarse mesh 3-d codes and for the 'BUBA' code in particular.