On Evaluation of the Statistical Error in Measuring the Reactor Period and Reactivity in Case of a Drift-Type Disturbance

In case of a drift-type disturbance, the systematic error of the period to be measured is reduced by the formation of first-order differences between the counts in successive time intervals. The influence of the correlation between the differences on the error of the period to be measured is studied; a connection is found between the parameters of the experiment to fulfill the condition that the correlation between the differences should be equal to zero; the precision limits of the period and reactivity measurements are obtained.