Evaluation of VVER Reactivity Coefficients in Normal Operating Regimes with Change of External Load
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.
Unable to display preview. Download preview PDF.
- 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
- 2.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
- 4.V. I. Savander and M. A. Uvakin, Physical Theory of Nuclear Reactors. Part II. Perturbation Theory and Slow Nonstationary Processes, MIFI, Moscow (2012).Google Scholar