<div> This book provides an overview of probablistic methods for calculating the strength and operating life of equipment and pipelines of nuclear power plants (NPPs), including using the criteria of resistance to full or partial destruction with the formation of breaks, leaks or defects in the metal, taking into account the aging of equipment and pipelines in service. The authors pay particular attention to the practical application of the results of calculations of the strength and operating life of equipment and pipelines, the optimization of inservice inspection and maintainance and repair.<BR> <br> The aims of this books are:<BR> -To describe the main methods used in nuclear power engineering for the determination of quantitative characteristics of the reliability of equipment and piping of NPP<BR> -To clarify the mechanisms of aging of equipment and piping in service and discuss the impact of those mechanisms on reliability<BR> -To evaluate the possibility of extensive practical application of the methods for determining the reliability characteristics and the use of these methods for solving the current problems in operation<BR> <br> This is a revised and translated version of an original Russian language work published in 2010 by Energoatomizdat, Russia.</div>