engleski

Assessment of extending operation of Nuclear Power Plant Krško from 2023 to 2043 – techno economic, ecological and power flow and system dynamics influence

The Krško Nuclear Power Plant - NEK, after almost 40 years of successful operation, is nearing the end of its originally assumed service life. The NEK is ready for an extension of its service life by another 20 years. The assessment was performed to study the technical-economic and environmental impact of the operation of NEK, as well as the impact on the Croatian power system (taking into account the aspects of interaction between NEK and the operation of the Croatian power system) in the period between 2023 and 2043. In the analyses, two scenarios from the Croatian Energy Strategy were used to describe the future development of electricity generation in Croatia, and scenarios assumed rapid introduction of renewable energy sources. Therefore, the lifetime extension of NEK proves to be economically more favourable. In addition to the economic aspects, extending the life of NEK is also more favourable from the environmental point of view, since extending the life of NEK means less CO2 emissions than the early decommissioning of NEK The focus of the second part of the study is on the evaluation of the impact of the Krško NPP on the power flows and system dynamics in the Croatian power system. It deals with: Power flows and steady-state analysis of losses and voltages, as well as qualitative impact on system frequency dynamics of the simplified model of the isolated Croatian power system, with the aim of evaluating the impact of the NEK operation on the Croatian power system. As can be seen from all analysed scenarios, cases and performed sensitivity analyses, the extension of the life of NEK proves to be the more favourable option in terms of economic indicators and greenhouse gas emissions. The system with Krško NPP in operation has better synchronous inertia and dynamic response to disturbances.

Krško Nuclear Power Plant ; PLEXOS ; LCOE ; GHG emissions , power flow ;

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