2019, Issue 4

DOI: 10.55176/2414-1038-2019-4-118-127

Authors & Affiliations

Artemov V.G., Artemova L.M., Korotaev V.G., Kuznetsov A.N.
Alexandrov Research Institute of Technoloqy, Sosnovy Bor, Russia

Artemov V.G. – Head of Laboratory, Cand. (Tech.) Sci., Alexandrov Research Institute of Technoloqy.
Artemova L.M. – Senior Researcher, Alexandrov Research Institute of Technoloqy.
Korotaev V.G. – Lead Engineer, Alexandrov Research Institute of Technoloqy.
Kuznetsov A.N. – Head of Group, Senior Researcher, Alexandrov Research Institute of Technoloqy. Contacts: 72, Koporskoe shosse, Sosnovy Bor, Leningrad region, Russia, 188540. Tel.: +7 (813) 696-08-83; e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it..

Abstract

This paper presents the results of “Benchmark Rostov 2” test task simulation using SAPFIR_95&RC_VVER program package; the test task is based on a full-scale experiment performed at the Rostov NPP, where the transition mode with boric acid dilution and a working group insertion to compensate the reactivity were implemented. The purpose of this task is to develop the methods of non-stationary computation of pin-by-pin power energy distribution in calculation programs for neutronic and thermohydraulic characteristics of VVER-type reactors.
The SAPFIR_95&RC_VVER program package uses two calculation methods of pin-by-pin power energy distribution: micro- and macro-flux superposition method and combined fine-grid method, where the nodes of radial computational grid in the reactor core coincide with the centers of fuel elements in fuel rod assembly. The combined fine-grid method for calculating pin-by-pin power energy distribution is carried out with the known values of burn-up distributions, fuel temperature, and coolant density obtained from superposition method. Both approaches are used for solving stationary and non-stationary tasks. When simulating the non-stationary processes, the test task can be solved in conjunction with KORSAR thermohydraulic code.
This paper describes neutronic models of VVER-1000 reactor core used in “Benchmark Rostov 2” test task for superposition method and combined method. Calculation results for power energy distri-bution fields are given.

Keywords
pin-by-pin power energy distribution, fine-grid computation, superposition method, dynamic calculation, coupled neutronic and thermohydraulic calculation

Article Text (PDF, in Russian)

References

UDC 621.039.5

Problems of Atomic Science and Technology. Series: Nuclear and Reactor Constants, 2019, issue 4, 4:12