# Priorities in the development of nuclear constants support system for reactor and shielding calculations

3/28/2016 2016 - #02 Physics and technology of nuclear reactors

https://doi.org/10.26583/npe.2016.2.13

### UDC: 621.039.51.17

Equation transport of neutron and gamma radiation in the energy, essential in the calculations of fast reactors and radiation shielding, does not contain any significant approximations - the accuracy of its solution is determined almost entirely accurate knowledge of the characteristics of the interaction of radiation with matter and, only partially, of correctness of computational techniques. Providing computational codes with reliable data about the characteristics of the interaction is the responsibility of the sectoral metrological service. Bringing methods of using these characteristics in the calculation of radiation fields in accordance with the state of knowledge of these characteristics should be one of the most important tasks in developing a new generation of codes.

Hereafter the priorities in this direction are considered that must be addressed when developing a new generation of constants supplying software for fast reactor calculations as it is a unified system ABBN-2020 of multigroup neutron nuclear physics constants obtained on the basis of files ROSFOND national neutron data library. At the same time, along with the creation of a perfect system to ensure nuclear constants calculations, a considerable attention must be paid to the development and creation of methodology and computer code system for the evaluation and ranking of the estimated errors in the calculation of nuclear reactors in order to be concentrated on the most important issues.

Creating of a new generation unified nuclear constants support system ABBN-2020 and its implementation in the design codes will not only ensure uniformity neutron constants preparation procedures, which will increase the reliability of their verification, but also improve the accuracy and reliability of predictions of the most important characteristics of the designed reactors, providing their license purity, competitiveness and independence from foreign developments.

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neutron data files ROSFOND multigroup nuclear constants BNAB calculations of fast reactors radiation shielding fuel cycle