Вдосконалення методології термогідравлічного аналізу в рамках продовження терміну експлуатації суднових реакторів

Abstract

At the moment, Ukraine and other countries are implementing a program to extend the nuclear power plants operation over the design period, which is economically advantageous, as the level of capital expenditure required for this is significantly lower than for the new power units building. Particular attention is paid to assessing the technical condition and extending the reactor vessel operation (thermal shock assessment), as the vessel is the most expensive and complicated element of the power unit in terms of manufacturing and replacement. For this assessment, in particular, for the thermal-hydraulic analysis, special methodologies are used in the world. Analysis of the main existing methodologies of thermal-hydraulic analysis used in Ukraine and the world has shown that the practice of performing thermal-hydraulic analysis in Ukraine is ahead of theoretical knowledge, international experience and early national experience, and therefore requires optimization and improvement. In the present work, the most relevant results of thermohydraulic, probabilistic and strength evaluations performed for SUNPP-3 were analyzed. In addition, the obtained results were compared with other results obtained for other power units recently.