Optimal Choice of Data on Delayed Neutrons

The paper consists of two parts. In the first part there is a description of the new criterion proposed for estimation of quality of delayed neutron data facilitating choice of the best delayed neutron data library out of those available in terms of description of reactor neutron kinetics in order to assure high precision of analytical studies and measurements. The second part is devoted to the new methods of identification of reactivity and other coefficients in the equations of point reactor kinetics facilitating reactivity measurements requiring no information on the rate of neutron source in the reactor or delayed neutron data. (authors)