The simulation of the reactor kinetics equations on an analog computer presents no difficulties in most applications. However, in situations where the reac tor is designed to give large bursts of neutrons, ana log computers do not have a great enough range. Fortunately, it is possible to transform the kinetics equations into a form in which the log of neutron flux instead of the flux is the dependent variable. This permits the simulation of pulsed reactors such as TREAT, or certain types of rocket motors.
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