[en] Nuclear Recycle Group deals with back-end activities of the Nuclear Fuel Cycle aiming at recovery of useful materials by reprocessing of spent fuel and management of radioactive waste generated. Safe operation of these activities requires well designed structures, systems and components to ensure shielding, containment, strength, functionality, and longer service life. Various facilities are operational and are also under planning and construction for carrying the activities related to spent fuel reprocessing, extraction of useful radioisotopes for societal benefits and finally storing/disposing of the processed radioactive waste as per regulatory guidelines. Upkeep of old plants and buildings by assessing their condition periodically and health restoration by undertaking structural repair is also an important activity. This article presents an overview of various aspects of design, construction as well as ageing management of such facilities. (author)

[en] Civil structures house various radiological facilities/equipment/systems and are subject to ageing with passage of time and its structural health assessment is an important aspect. This necessitates systematic approach for ageing management and deciding various non-destructive tests (NDTs) and their extent to be conducted, analysis of the results and finally health restoration of the structure. The condition assessment and strengthening may also be required for the integrated extension of an existing structure. This paper presents an overview on condition assessment, repair categorization, materials and methodologies for strengthening of structures. A case study on ageing management of one of the important radiological structures has been briefly covered demonstrating the approaches used. (author)