Atomic Energy

, Volume 123, Issue 4, pp 230–234 | Cite as

Evaluation of VVER Reactivity Coefficients in Normal Operating Regimes with Change of External Load

  • M. A. Uvakin
  • A. P. Demekhin

The activity coefficients of a reactor facility with VVER in normal operating regimes associated with a change of the external load are studied. The model used to evaluate the reactivity coefficients in terms of the moderator density and fuel temperature aided by the connected KORSAR/GP code is described. A three-dimensional model of the neutron kinetics and a realistic model of the main regulators are used. Calculations of the reactivity coefficients for a regime with unloading of the turbogenerator and the regime of primary regulation of the power system frequency are studied as test problems. A physical analysis of the results is performed.


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  1. 1.
    M. A. Uvakin, A. P. Demekhin, G. V. Alekhin, et al., “Differential method of estimating the reactivity coefficients of a VVER reactor using the KORSAR/HEP and TRAP-KS codes,” Vopr. At. Nauki Tekhn. Ser. Fiz. Yad. Reakt., No. 2, 42–48 (2016).Google Scholar
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    I. G. Petkevich and M. A. Uvakin, “Application of the LINQUAD code for analysis of the uncertainties in calculations of a regime with the steamline rupture in the AES-2006 setup performed with KORSAR/GP,” ibid., No. 2, 51–60 (2013).Google Scholar
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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  • M. A. Uvakin
    • 1
  • A. P. Demekhin
    • 1
  1. 1.Gidropress Experimental Design Bureau (OKB Gidropress)PodolskRussia

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