The efficiency increase of the low-potential K-1000-60/3000 turbine complex of No. 3 power unit at the Rivne NPP.
Students Name: Stepanyshena Svitlana
Qualification Level: magister
Speciality: Heat and Power Engineering
Institute: Institute of Power Engineering and Control Systems
Mode of Study: part
Academic Year: 2022-2023 н.р.
Language of Defence: ukrainian
Abstract: Stepanyshena S.M., Galyanchuk I.R. (supervisor). The efficiency increase of the low-potential K-1000-60/3000 turbine complex of No. 3 power unit at the Rivne NPP. Master’s thesis. – Lviv Polytechnic National University, Lviv, 2022. Extended abstract. Energy is the leading branch of the national economy of Ukraine. Its development, in turn, depends on natural conditions, the state and development of other industries, the technical level and productivity of industrial plants [1, 2]. Energy management includes power generation stations, networks and energy transmission systems, and end consumers. A powerful energy complex for the production, distribution and sale of thermal and electrical energy has been created in Ukraine. Centralized production of electrical energy, in the basic part of Ukraine’s load schedule, is carried out at NPP power units. Continued operation of existing equipment without the introduction of new technologies may lead to accidental accidents with corresponding consequences. In order to overcome the existing difficulties and troubles in the energy sector, it is necessary to introduce new energy technologies and improve the existing ones. An important step in the effective operation of nuclear power plants is the improvement of schemes and modes of operation of heat transfer systems of power units. Their subsystems are complexes of heating surfaces of heat exchange nodes and their aggregates. Experimental studies of modern powerful energy facilities are often necessary in non-standard intermediate modes of their operation. However, there are significant limitations to their implementation - both purely technical and financial or security. To increase the reliability and operational safety of the equipment of the 2nd contour of the turbine, including steam generators, it was proposed to modernize the low-potential K-1000-60/3000 turbine complex using the example of power unit No. 3 of the Rivne NPP. In this work, attention is focused on improving the performance of the seals of the low-pressure cylinder of the turbine and the introduction of a system of continuous ball cleaning of the condenser tubes to maintain the cleanliness of their heat exchange surface. Study object - thermal processes in low pressure seals and turbine condenser K-1000-60/3000. Scope of research - the effect of low-pressure cylinder seals and deposits and layers of condenser heat exchange surfaces on the efficiency of the K-1000-60/3000 low-potential turbine complex. Goal of research - modernization of the low-pressure cylinder seals and maintaining the cleanliness of the heat exchange surface of the condenser in order to increase the efficiency of the low-potential K-1000-60/3000 turbine complex of power unit No. 3 of the Rivne NPP. In the first section of the work, the general characteristics of the principle scheme of the turbine installation of the power unit with a capacity of 1000 MW of the Rivne NPP are given. In the second section, the thermal calculation of the basic thermal scheme of the 1000 MW NPP power unit is performed. As a result of the calculation, the main parameters of steam, water and condensate flows in the elements are determined. The internal power of the turbo installation was calculated. The third section is devoted to reconstructive measures of the end seals of the low-pressure cylinder of the K-1000-60/3000 turbine, in particular, a new method of their operation is proposed. The fourth chapter presents the main reasons for reducing the vacuum in the turbine condenser [3]. Methods of preventing deposits and layering and methods of their cleaning are considered [4]. The fifth chapter shows the technology of maintaining the cleanliness of the internal heat exchange surfaces of the condenser using a ball cleaning system using TAPROGGE balls. The sixth section of the work is devoted to the development of a new system for cleaning the heat exchange surfaces of the condenser of the power unit of the Rivne NPP. The main parameters of the ball cleaning system were calculated. In the economic part of the work, the calculation of the economic effect of the modernization of the vacuum system of the K-1000-60/3000 turbo installation was carried out. In the automation section, automatic control of the main technological processes in the steam turbine and condenser of the NPP power unit during its operation has been developed. The selection of devices and means for its operation was carried out [5]. Keywords - NPP, power unit, steam turbine, condenser, sealing, deposition, heat exchange surface. References. 1. Fuel and energy complex of Ukraine on the threshold of the third millennium: Scientific publication of the National Academy of Sciences of Ukraine. – Kyiv: Ukrainian Encyclopedic Knowledge, 2001. – 400 p. 2. Energy resources and flows: NAS of Ukraine. - Kyiv: Ukrainian encyclopedic knowledge, 2003. – 472 p. 3. I.N. Kirsanov. Condensation plants. Moscow.: Energy, 1965. - 376 p. 4. V.Z. Kochmarskyi, V.R. Gaevskyi, O.V. Kochmarskyi. Dynamics of scale in recirculating cooling systems. // Bulletin of NUVHP, vol. 1(41). Rivne 2008, Art. 282 - 291. 5. Brylynskyi R.B., Stasyuk I.D., Krykh G.B. "Automation of the technological process at a nuclear power station. Methodological guidelines - Lviv: Publishing House of the Lviv Polytechnic National University, 2019. - 26 p.