Finite element modeling, numerical calculation, and experimental researches for evaluating the seismic stability of the power units of Ukrainian nuclear power plants

It represents the information about the complex work for the prolongation of the operational life cycle for a Nuclear Power plant (NPP). The analysis of the impact of the following types of the finite elements, their size and form on the accuracy of the obtained values of the characteristics of the stressed-deformed state of the analyzed sealed pipe penetration is given (as an example). The methodology of experimental researches is considered and solutions with the additional support of equipment is offered.