Authors & Affiliations

Koscheev V.N., Peregudov A.A., Rozikhin E.V., Semenov M.Yu., Yakunin A.A.
A.I. Leypunsky Institute for Physics and Power Engineering, Obninsk, Russia

Koscheev V.N. – Leading Research, Cand. Sci. (Phys.-Math.), A.I. Leypunsky Institute for Physics and Power Engineering. Contacts: 1, pl. Bondarenko, Obninsk, Kaluga region, Russia, 249033. Tel.: +7(484) 399-42-65; e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it..
Peregudov A.A. – Senior Research, Cand. Sci. (Tech.), A.I. Leypunsky Institute for Physics and Power Engineering.
Rozikhin E.V. – Senior Research, A.I. Leypunsky Institute for Physics and Power Engineering.
Semenov M.Yu. – Leading Research, Cand. Sci. (Phys.-Math.), A.I. Leypunsky Institute for Physics and Power Engineering.
Yakunin A.A. – Researcher, A.I. Leypunsky Institute for Physics and Power Engineering.

Abstract

In the practice of calculating the neutron characteristics of reactor applications, the relevant employees deal with computational models of various details. At the same time, a complex situation often arises before them, connected with the need to "calculate" models of RU with a large number of physical zones (~ 50000), many of which have different temperatures. This complexity is due to the fact that the stage of preparation of nuclear data libraries is separated from the stage of their use in practical codes. For example, the code MMKC (or MCNP5) uses nuclear data libraries prepared for several "reference" temperatures.
The stage of preparing nuclear data for a new set of temperatures can be simplified. Prepare a new library of nuclear data using the makxsf code, if there are ready-made sets of nuclear data for "reference" temperatures. However, and this simplified version of the preparation of a nuclear data library for an arbitrary temperature requires considerable time.
In article a simple method of modeling nuclear data for an arbitrary temperature is proposed using proportional-temperature concentrations on the basis of data prepared once at "reference" temperatures. Proportional-temperature concentrations depend only on the concentration of the isotope, its temperature and the temperatures of neighboring "reference" values. When the temperature conditions in the calculation problem change, they can be easily recalculated.
The use of the method of proportional-temperature concentrations is demonstrated on test models. These models are typical for both fast and thermal systems.

Keywords
the neutron characteristics of reactor applications, MCNP code, MMKC code, ROSFOND2010 nuclear data library, modeling nuclear data for an arbitrary temperature, proportional-temperature concentrations method, testing method

Article Text (PDF, in Russian)

References

UDC 004.94:681.3.06

Problems of Atomic Science and Technology. Series: Nuclear and Reactor Constants, 2019, issue 1, 1:21