2 - Key elements and principles of nuclear power plant life management (PLiM) for current and long-term operation

Abstract

Key elements and principles of nuclear power plant (NPP) life management for current and long-term operation (LTO) are presented. Concepts and methodologies of NPP ageing surveillance programmes (ASPs), ageing management (AM) and plant life management (PLiM) are discussed. Ageing degradation (AD) terminology concerning NPP systems, structures and components (SSCs) is provided. Safety classification of SSCs, precursors for scoping and applying optimum OPs, ASPs, AM and PLiM programmes, design requirements of NPPs, knowledge management, human factors, safety culture, radiological protection, SSC-AD mechanisms and AD mitigation, obsolescence in equipment, regulatory aspects, radioactive waste disposal and radiological protection are discussed. Concepts for future NPP designs and PLiM are introduced. It is shown that by implementing the state-of-the-art, science and technology into the existing standard plant operational practices (OPs), which include ASPs, and AM and PLiM programmes, SSC-AD can be managed to keep the option open for NPPs to reach, and then exceed, their original design lives in a safe and profitable way.