Authors & Affiliations

Kizub P.A., Mitenkova E.F.
Nuclear Safety Institute of the Russian Academy of Sciences, Moscow, Russia

Abstract

Monte Carlo criticality calculations traditionally focused on the correct calculation of neutron multiplication factor Keff. For loosely coupled systems initially the primary focus was on the selection of statistical parameters’ values (the number of neutrons in the generation, the number of inactive generations etc.), zero generation neutron distribution functions and the improvement of Keff calculation methods aimed at minimizing the time consumption for gaining asymptotics. The specific features of loosely coupled systems provide for the need in an individual analysis of correctness and stability of neutron flux distribution in criticality calculations. This paper presents the analysis of fission reaction rate distribution for a loosely couples system “Checkerboard”. The calculations have been performed using the TDMCC and MCNP5 codes.

Key words
Neutronics problems, Monte Carlo method, criticality of loosely coupled systems, neutron flux, zero generation neutrons, neutron multiplication factor Keff, fission rate

Article Text (PDF, in Russian)

References

UDC 621.039.514+621.039.51...17

Problems of Atomic Science and Technology. Series: Nuclear and Reactor Constants, issue 1:4, 2015