The efficiency increase of the condensing unit of the K-1000-60/3000 turbine of the 1000 MW power unit at the South Ukrainian NPP during its operation.
Students Name: Suchok Oksana Oleksandrivna
Qualification Level: magister
Speciality: Heat and Power Engineering
Institute: Institute of Power Engineering and Control Systems
Mode of Study: part
Academic Year: 2023-2024 н.р.
Language of Defence: ukrainian
Abstract: Suchok O.О., Shepitchak V.B. (supervisor). The efficiency increase of the condensing unit of the K-1000-60/3000 turbine of the 1000 MW power unit at the South Ukrainian NPP during its operation. Master’s thesis. – Lviv Polytechnic National University, Lviv, 2023. Extended abstract. Currently, the nuclear power industry of Ukraine has four nuclear power plants at its disposal - Zaporizhzhya, Khmelnytskyi, Rivne, and South-Ukrainian, the most powerful of which is inactive due to military operations in the east of the country [1]. Energy reactors of the water-water type and condensing steam turbine units are used at all NPPs. According to IAEA safety standards, the effects of aging and wear of equipment in all operational modes, including testing, maintenance, downtime due to maintenance, should be properly taken into account during the design of nuclear power plants [2, 3]. In addition, the operating organization is obliged to ensure the implementation of an effective aging management program to ensure that the facilities, systems and components of the station perform the necessary safety functions throughout the entire life of the station [4]. The administration of the South Ukrainian NPP considers its priority task the implementation of activities in the field of aging management, which is a key element for the safe and reliable operation of its power units. To achieve this goal, power unit aging management programs have been developed and implemented, a number of organizational, technical and operational measures have been defined, which are carried out to maintain, within permissible limits, degradation due to aging and wear. Aging management programs for individual elements and structures are developed with the aim of maintaining within acceptable limits the degradation of elements and structures important for safety due to aging, wear, corrosion, erosion, fatigue and other mechanisms, as well as taking the necessary actions to maintain their operability and reliability in the process operation [5]. In order to increase the reliability and safety of the equipment of the 2nd circuit of the gas station of the South Ukrainian NPP, it was proposed to modernize the condensing unit and replace the capacitors with more reliable and efficient ones. In order to avoid damage to the tube capacitor system of the K-1000-60/3000 turbine unit of the South Ukrainian NPP during long-term operation, K-38080 capacitors are installed. These capacitors allow you to avoid reducing the service life and deterioration of operational reliability. due to damage to living species as a result of the development of various species corrosion from the side of the cooling water, as well as deterioration of performance indicators of the NPP power unit due to a reduction in the working capacity and safety of auxiliary equipment. Study object – condensation processes of spent turbine steam of NPP power units. Scope of research – the effect of the operation of the K-1000-60/3000 turbine condensing unit on the efficiency of the operation of the 1000 MW power unit of the South Ukrainian NPP. The purpose of the study is to modernize the capacitors of the K-1000-60/3000 turbine to increase the reliability and efficiency of operation of the 1000 MW power unit of the South Ukrainian NPP. The first section of the work presents general information about the main equipment and layout of power units of the South-Ukrainian NPP. The second section is devoted to the modernization of the steam turbine condenser K - 1000-60/3000. It presents the general concept of condenser modernization and analyzes the types of contaminants and their consequences for heat exchange pipe systems. In the third section, the operation of the modernized condenser for the K - 1000 - 60/3000 steam turbine was analyzed in different modes and the main graphical dependencies were developed. In the fourth chapter, the vibration strength calculation of the modernized capacitor is performed. In the economic part of the work, the calculation of the main technical and economic indicators was performed and the high payback of this project was established. In the automation section, the design of the system for automatic regulation of the condensate level in the turbine condenser was carried out, a brief description of the technological scheme was given, and the selection of the regulation system and technical means of automation was carried out. Keywords: nuclear power plant, power unit, nuclear reactor, condenser, heat exchange surface. References. 1. The official website of NAEK "Energoatom" access mode https://www.energoatom.com.ua/. 2. INTERNATIONAL ATOMIC ENERGY AGENCY, Safety of Nuclear Power Plants: Design, IAEA Safety Standards Series No. SSR-2/1, IAEA, Vienna (2012). 3. INTERNATIONAL ATOMIC ENERGY AGENCY, Safety of Nuclear Power Plants: Commissioning and Operation, IAEA Safety Standards Series No. SSR-2/2, IAEA, Vienna (2011). 4. T.H. Margulova "Atomic Electric Stations", M.: Higher School, 1978. 5. Yu.M. Brodov, K.E. Aronson "Heat exchangers of power plants", Yekaterinburg, 2008.