Assessment of nuclear concentration uncertainties in isotope kinetics by the interval calculation method

Basically, the problem of dependency fuel cycle characteristic uncertainties from group constants and decay parameters uncertainties can be solved (to some extent) as well by use of sensitivity analysis. However such procedure is rather labor consuming and does not give guaranteed estimations for received parameters since it works, strictly speaking only for small deviations cause it is initially based on linearization of the mathematical problems. Suggested and realized technique of fuel cycle characteristic uncertainties estimation is based on so-call interval analysis (or interval calculations). The basic advantage of this technique is the opportunity of deriving correct estimations. In a professional terms this decision consist on introduction of a new special type of data such as Interval data in a codes and definition from them all arithmetic operations. Interval type data are in a real practice operation and use now. There are many realizations of interval arithmetic implemented by different ways. (orig.)