A. K. Popov

The model of the IBR-2 pulsed reactor of periodic operation for investigations of transitional processes

Abstract A model of the IBR-2 pulsed reactor of periodic operation is developed to facilitate modeling of transitional processes. The model is constructed as a module structure with the help of discrete transfer functions of the kinetics, power feedback and automatic regulator blocks taking into account nonlinear relationships. Good agreement between the calculated and experimental dependence of changes in the power for different changes in the setting reactivity is achieved.

Dynamics model of the IBR-2M pulsed reactor for analysis of fast transition processes

A nonlinear model of the IBR-2M pulsed reactor dynamics relating values of variables at discreet instants of time (when power pulses appear) is developed on the basis of the MATLAB program system. The tests of the model by simulating calculated processes in the IBR-2M reactor proved the correctness of the model. A tentative estimate of the transfer coefficient for the linear part of the automatic regulator is obtained.

Influence of automatic regulator parameters on power transition processes of the IBR-2 reactor

Abstract Using a model of the IBR-2 reactor based on the block structure with z-transformation of constants and experimentally determined feedback parameters, power transition processes have been evaluated at different values of the parameters of the automatic power regulator (APR). It has been shown that, at regular reactivity excitations, the best transition processes correspond to higher APR rates at the elimination of the APR smoothing unit. The recommendations are given for choosing the APR parameters when at normal operation of the IBR-2 reactor there are random reactivity excitations.

Control of reactor pulses by external neutron injection

Abstract It is shown that it is possible to regulate the energy of each pulse of a powerful pulsed periodic reactor using an injector of relatively low power. The target in the reactor core generates the neutron pulses forced by the injector. The correlations for determination of the moment of injection are obtained. The equation connecting the mean reactor power, the intensity integral of the target and the scatter multiplicity of the pulse energy without injection is obtained. In addition to its function as a regulator, the injector plays the role of an auxiliary emergency unit. It is shown that using an injector provides a regime in which the reactor can generate power pulses in the form of periodic packets.