DOI: 10.33917/mic-3.116.2024.41-68

An improved methodology for calculating microeconomic criteria for the effectiveness of investments in energy projects (and other real sector projects) based on the UNIDO methodology is presented. It allows to determine the analytical relationship between the engineering and economic parameters of power plants (throughout their life cycle) and a set of microeconomic criteria for the effectiveness of investments. Strictly mathematically, the secondary criteria are derived from the definition of the main microeconomic criterion – net present value (NPV): the internal rate of return IRR, the levelized cost of electricity (LCOE) and the discounted payback period DPP.  Numerous examples and graphic illustrations of estimates of individual parameters of investment projects and criteria for investment efficiency are given. A significant difference between the proposed methodology for calculating investment efficiency criteria is the use of average annual values of revenue, operating costs and production, as well as the introduction of special coefficients (φ) reflecting the effect of discounting cash flows at each period of the life cycle (construction, operation and decommissioning).

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DOI: 10.33917/mic-2.97.2021.55-63

The estimates of the competitiveness of the balanced closed nuclear fuel cycle with thermal reactors VVER, PWR and BWR and innovative REMIX-fuel are given. REMIX-fuel obtained by reprocessing spent fuel. Considered three options for REMIX-fuel — А, Б and C, differing in the way of achieving enrichment (concentration of fissile isotopes ²³⁵U and ²³⁹Pu), needed for reactors. The fuel component of the NPP electricity cost is used as competitiveness criterion, which reflects all the costs of the fuel cycle for both before the reactor and after the reactor stages. The developed economic-mathematical model of the fuel cycle makes it possible to calculate a cost indicators of nuclear fuel components and the fuel components of the NPP electricity cost depending on the cost characteristics of key technological conversions, including reprocessing of spent fuel, enrichment of regenerated and natural uranium, manufacture of fuel assemblies, radioactive waste management and compare with the traditional fuel cycle.