Replacement of the containment prestressing system (CPTS) when the NPP unit life extension

Abstract

The paper deals with the replacement problem of the containment prestressing system (CPTS) at the extending stage of CCB life characteristics. The features of domestic CPTS used in the blocks construction in the 80s and the system developed by the French company Francine - CPTS-M used today as a replacement for the units modernization are studied. The paper describes their features and some problems associated with the monitoring organization of the unit life extension period.