New Generation ‘Block-Modular’ Condenser for K-1000-60/1500-2 Turbine Units in Zaporozhskaya NPP

Authors

A. N. Uss, Joint-Stock Company Turboatom (199, Moskovsky Ave., Kharkiv, 61037, Ukraine), e-mail: office@turboatom.com
S. T. Patsiuk, Joint-Stock Company Turboatom (199, Moskovsky Ave., Kharkiv, 61037, Ukraine), e-mail: office@turboatom.com)
A. V. Panchenko, SE “Zaporizhzhya NPP” (133, Promyshlennaya str., Energodar, Zaporizhzhya region, 71504, Ukraine)
A. V. Shavlakov, SE “NNEGC “Energoatom” (3, Nazarivska str., Kyiv, 01032, Ukraine), e-mail: energoatom@atom.gov.ua
D. Kh. Kharlampidi, A. Podgorny Institute of Mechanical Engineering Problems of NASU (2/10, Pozharsky str., Kharkiv, 61046, Ukraine), e-mail:  kharlampidi@ipmach.kharkov.ua, ORCID: 0000-0003-4337-6238

Abstract

The condensing devices of steam turbine plants considerably determine the reliable and economical operation of NPP power units. In some cases, breakdowns in their operation result in a forced decrease in the electric capacity of the power unit and a decline in the reliability, as well as in a significant underproduction of electric power. The main reason determining the necessity to modernize the condensers is the damage to the metal in different sections of the cooling tubes, caused by erosion-corrosion under the influence of the turbulent flow of the cooling water saturated with oxygen, as well as presence of solid particles and other contaminants, which results in the breakage of the water density of the tube systems, leakage of copper into the cycle of the turbine unit and, in the long run, in the loss of the turbine electric power, the reduction in resource and deterioration of the operational reliability of the auxiliary equipment and steam generators, which, finally, sharply worsens the performance of the NPP. A system of separate modules of complete factory readiness with assembled cooling tubes has been created, which made it possible to design a new generation ‘block-modular’ condenser, which provides high technical and economic indicators in a wide range of operating modes with the subsequent increase in turbine unit electrical power across the generator terminals through deepening the estimated steam pressure. Cooling tubes and external plates made of corrosion resistant materials are used in the condenser design, which increases reliability, efficiency, safety and prolongs the unit’s service life. The condenser design allows for the withdrawal of the uncondensed vapor-air mixture from the tube bundle and the complete condensation of the vapor coming from the turbine LPCs.

Keywords: condenser, cooling pipes, steam turbine, corrosion

Full text: Download in PDF

References

1. Shvetsov, V. L., Uss, A. N., & Gavrilova, V. V. (2012). Modernization of condensers for K-1000-60/1500-2M turbine units of Rostov and Balakovo NPPs by replacing the material of tube systems and creating a ‘block-modular’ design. Energetic and heat engineering processes and equipment, no. 8. pp. 26–35 (in Russian).
2. Pat. application to ‘Ukrpatent’, Kyiv, Ministry of Education and Science of Ukraine, no. 1-40-34/191 of 09/11/2012.
3. Kirsanov, I. N. (1965). Condensation units. Moscow: Energiia (in Russian).
4. Berman, L. D. & Zernova, E. P. (1982). Guidelines for Thermal Calculation of Surface Condensers of Powerful Turbines for Thermal and Nuclear Power Plants. Moscow: Vsesoiuz. teplotekhn. in-t (in Russian).
5. Kosyak, Yu. F. (1978). Paroturbine installations of nuclear power plants. Moscow: Energiia (in Russian).
6. (1989). Rules and Norms in Nuclear Power Engineering PN AE G-7-002-86. Norms for calculating strength of equipment and of nuclear power plants. Moscow: Energoatomizdat (in Russian).

Received 24 January 2018

Published 30 March 2018