[en] Analysis of the relationship between the parameters of slow power feedback and power production in the pulsed fast reactor IBR-2 has been accomplished. The investigation result has shown that unlike the parameters of fast power feedback, the parameters of slow dynamics are not related to energy production and have considerable noise components. This is caused by the fact that the slow dynamics of the reactor is generated by the processes in the structural components around the reactor vessel, in which relatively mild radiation, thermal and mechanical conditions are observed. The most possible causes of the random change in the parameters of slow dynamics from one reactor cycle to another are the irreversibility of displacement of the stationary reflectors, change in the parameters of the cooling systems of the stationary reflectors. This randomness in the dynamics of the reactor does not influence the reliability and safety of the reactor