The minimization of uncertainties in reactor theory

This paper deals with the question of the requirements associated with the uncertainties in nuclear data. This question arises when given target accuracies are required for selected performance parameters of a nuclear reactor. This problem is also known as the 'inverse problem'. There are two ways to deal with the inverse problem as presented in this paper. The first way is to consider the nuclear data only in what we call the 'differential approach'. The second way is to consider the nuclear data as well as integral experiments in what we call the 'integro-differential approach'. When there are no specific target accuracies, minimization of the uncertainties in the nuclear data can be considered by minimization of the reactor input parameters' entropy.