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Service operation of nuclear power plants
Krutiš, Petr ; Foral, Štěpán (referee) ; Radil, Lukáš (advisor)
This thesis deals with the service operations that are essential for the smooth running of the Dukovany Nuclear Power Station. The first part describes the nuclear power station with its VVER 440 reactors; it particularly describes basic devices of the primary circuit, which include a nuclear reactor, a steam generator, the main circulating pump, a pressurizer and the main closing fitting. The next chapter concerns water management, whose main objective is pumping crude water and treating it so that it can be used in technological circuits of the power plant as well as in secondary systems, which maintain the required parameters and conditions necessary for the operation of basic devices of the primary circuit. The secondary systems secure compensation of reactivity changes in the reactor. Next, they secure refilling, cleaning and degassing of the coolant. The final part of this Bachelor thesis describes an increase of the electrical output of one of Dukovany's units to 500 MW and its effect on the secondary systems of the primary circuit. The main adjustments before the output increase were performed on secondary circuit devices and electrical devices. Primary circuit's machinery remained unchanged.
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Design of The Data Communication Between Digital Protection Relays and Monitoring System of Dukovany Nuclear Power Plant
Šula, Vladimír ; Topolánek, David (referee) ; Toman, Petr (advisor)
This thesis describes the provision of the data communication of the new protection relays via 6 kV switch gears to the electro monitoring system at the Dukovany Nuclear Power Station. These protection relays will replace the current analog protection. The replacement process will start in 2015 and will finish in 2018. Given the overall complexity of the project, this thesis deals only with the following 6 kV switch gears 9BB and 9BD. The thesis is divided into a theoretical and a practical part. The theoretical part concerns the actual consumption and output of the Dukovany Nuclear Power Station. The following chapters describe the electro monitoring system and GRAF and LOGA software programs that are closely connected with it and that were used in the practical part. The last chapter of the theoretical part deals with the actual replacement of the protection relays of the 6 kV switch gears. Also, it describes a new optical network, which will be set up at the Dukovany Nuclear Power Station as a part of the process of replacement. The segment of the practical part concerns laboratory verification of the data communication of the new protection relays. Next, it describes actions that had to be taken in order to ensure and verify correct functionality of the data communication. This part is followed up by a closely related practical activity, which describes examination and verification of the protection functions of each of the 9BB and 9BD switch gears protection relays.
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