ECRAN PROGRAM FOR COMPUTATION OF EFFECTIVE FACTOR OF NEUTRON MULTIPLICATION IN REACTOR FACILITIES

A.N. Moskvin, A.V. Nikiforova, A.P. Trubitsyn, G.G. Farafontov, R.M. Shagaliev, V.A. Shumilin
VANT. Ser.: Mat. Mod. Fiz. Proc 1996. Вып.3. С. 35-39.

      This program is designed for computations of the effective neutron multiplication factor and neutron spectrum in multigroup two-dimensional kinetic approximation in cylindrical and plane geometries. The following iterative techniques of computation of effective neutron multiplication factor are implemented in the program: Kellog technique, direct iterative technique, method of fission source iteration and combined technique. This paper compares efficiency of these methods on test problems for various types of reactors (WWER, RBMK, SNR). To speed up simple iteration convergency within one group the consistent FCA-method is used. To speed up external iteration convergency in the fission source iteration method, the Chebyshev technique and successive upper relaxation techique are used.