Verification of the non-stationary neutronic calculation module in the ShIPR software system for modelling of experiments at the ASTRA HTGR type critical facility

The paper presents the comparison of stationary and nonstationary experiments carried out at the ASTRA critical facility and calculation by SHIPR software-based system. The experiments to define of radial speeds distributions of 235U fission reactions rateswere considered and simulated as stationary experiments. Experiments on the determination of kinetic parameters by the Simons-King pulse method were considered as nonstationary experiments. The results show good agreements with experiment in the calculations of both stationary and nonstationary experiments.