Planning of experiments and evaluations on neutron data for reactors

The problem of minimizing the cost of microscopic experiments summed up is solved, the requirements for the accuracy of any number of reactor parameters being met. A fast neutron reactor model is considered, the reactor content and size corresponding to those of a 1000 MW reactor. The mixture of 238UO2 and 239PuO2 containing higher isotopes is used as a fuel. The solution has been sought for in the space of 96 parameters with two limitations: 1) the breeding ratio is predicted with an error of +-2%, Ksub(eff) - with an error of +-1%. 26 integral experiments have been used. The problem of planning has been shown to be reduced to the multi-parameter problem of nonlinear programming, various ways to solve it have been considered. The microscopic experiment accuracy has been calculated that satisfies the accuracy required for the calculation of Ksub(eff) and the breeding ratio of a plutonium breeder taking into account the integral experiments and without account of them. The use of integral experiments reduces the requirements for the accuracy of microscopic experiments expressed in the terms of cost only by 1/3