Improvement of mathematical model of self-adjustable nuclear reactor

Investigations relevant to self-regulating regime in fast reactor were fulfilled in earlier papers of the authors. Some improvements are entered to mathematical model here, and the followed changes are investigated. One improvement is taking into account evolution of averaged cross-sections and quasidiffusion coefficients. Another one is improvement of power-control algorithm. The results of investigation are better than in previous calculations of reactor's properties and the power-control algorithm holds the reactor at the given power.