Izvestiya vuzov. Yadernaya Energetika

The peer-reviewed scientific and technology journal. ISSN: 0204-3327

A research of VVER-1200 reactor core control algorithms for implementation of flexible (load tracing) operating modes

6/24/2019 2019 - #02 Current issues in nuclear energy

Vygovskiy S.B. Al Malkawi R.T. Khachatryan A.G.

DOI: https://doi.org/10.26583/npe.2019.2.06

UDC: 621.039.50

Results of numerical studies of algorithms for controlling spatial distribution of neutron field in VVER-1200 reactor core operated inflexible daily reactor load adjustment modes are provided in the present paper. Possibility was demonstrated of automated control of axial offset of neutron power using one of the control groups for the purpose of removing the psychological stress on operational personnel of nuclear power plants in flexible reactor power load adjustment regimes. This allows as well additionally minimizing water exchange while retaining all nuclear safety parameters in the reactor core. Research was carried out using the PROSTOR software complex currently applied by the Novovoronezh NPP training center for conducting training sessions in optimal control algorithms for power unit operation in maneuvering modes for operational personnel of nuclear power plants. The methodology is suggested for adjustment of parameters of offset control depending on the neutronic characteristics of the reactor core. The expediency of the conducted study is explained by the fact that testing maneuvering daily NPP operating modes with reactor power load varying within wide range is planned under the NPP-2006 project to be conducted in Russia on the Novovoronezh NPP-2 and Leningrad NPP-2 power units. Implementation of such testing is necessary for verification of operability of power units in maneuvering daily modes for a number of contracts with foreign partners concluded by the RF and for enhancing competitiveness of VVER NPP equipment abroad.

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VVER-1200 offset-power phase diagram axial offset (AO) automated power controller (APC) control algorithm water exchange