Development and Application of Technologies Maintenance of a Lifetime and Safety the NPP Components
Authors: Arkadov G. V. , Getman A. F. , Usanov A. I. 
Published: July 2009

Researches, development and rendering of services in the field of maintenance of a resource, reliability and safety of the equipment and pipelines operation are conducted in the following directions: • Application of the system approach at the analysis and research of a problem of maintenance of strength, lifetime, reliability and safety of operation of the NPP equipment and pipelines. • Research of ageing of NPP steel components about use of metal cuttings, nonspecimen methods and surveillance specimens. The basic results on this direction are: - Data acquisition about changes of mechanical properties, crack resistance characteristics and metal structures after long operation, including after 100 thousand hours of operation, and also after 150 and 200 thousand; - Development and realization on the NPP in Russian and abroad nonspecimen methods of an estimation of mechanical properties in operation without a cutting of samples; - Development and realization on a number of the NPP in Russia and abroad technologies regenerative heat treatment of reactor pressure vessels after in service irradiation embrittlement. • Research and design works on creation and application on the NPP of systems of continuous diagnostics of a condition of pipelines and the equipment under the control of noise. The basic result on the given direction is installation on a number of units of the NPP of systems of diagnostics such as ALUS. • Researches and development in the field in-service inspection. The basic results are: - Development of typical technical rules of the in-service inspection of a steel NPP components of different type, switching VVER-440, VVER-1000, RBMK-1000, EPG-6, BN-600; - Development of bank of tests - samples with artificial defects and an estimation of reliability of some in-service inspection methods on the NPP. - Development of a technique and calculations in a substantiation of norms of the defects based on laws of the fracture mechanics; - Development of some techniques of in-service inspection. • Researches and creation of devices for control of operation modes necessary for monitoring of a residual lifetime, reliability and safety of the equipment and pipelines. Creation of the Automated monitoring system of residual lifetime (SACOR). • Development of methods of an estimation of a residual service life under normal conditions operation and their application for the decision of the NPP problems; • Development of methods of an estimation of a residual service life at infringement of normal conditions of operation, including at presence of defects such as cracks, and their application for the decision of the NPP problems; • Development probabilistic methods of an estimation of a residual lifetime, reliability and safety of the equipment and pipelines; their applications at the decision of the NPP problems. • Development and application on the NPP of methods and technologies of lifetime management with use of in-service inspection, hydrotests, repair and reconstruction. • Development and application on the NPP of technology based on a LBB concept. • Development of technologies for prolongation of service life of NPP units. • Entrance control of a condition of the equipment and pipelines at a stage of construction and commissioning of new units. • Development of necessary normative base for performance of above the described results. In the report the example of the system decision of a operational problems is given.