DESCRIPTION OF THE EXTENDED LIFETIME AND ITS INFLUENCE ON THE SAFETY OPERATION AND CONSTRUCTION MATERIALS PERFORMANCE – LONG TERM OPERATION WITH NO COMPROMISES IN THE SAFETY

Project HORIZON-EURATOM-2021-NRT-01-01

DELISA LTO project Keywords

VVER Technologies

NPP Life Time Extension

Material Swelling and Thermal Aging

Non-destructive methods

Main aims of the project

  • To increase operational safety over the lifetime and Long-Term-Operation 
     (LTO )  period  due to the  in-time  prediction and  avoiding  of the  potential  failure in  LWR  technologies in general and specifically on the VVER reactors.    

  • To determine the most  affected and  threatened  components from the LTO point of  view  and describe the effect of the LTO on the material properties.    

  • To provide a set of recommendations for future LTO-related assessments.    

  • To harmonize the national methodologies and to obtain the generally acceptable set of recommendations for the assessment of swelling and thermal aging.

  • To develop a  combined  non-destructive and  simulation tool, able to predict the non-acceptable state of the material  and able for the assessment of the prolongation of the lifetime of the LWR NPPs.     

  • To propose the  methodology of  the qualification of materials  or  components for the design life extension. 

Project presentation
Primary and secondary Loops components subject to swelling and thermal aging (VVER 440)