During manufacturing and nominal regime and casting of turbine components the surface and under surface cracks have been initiated. The cracks should be repaired. The companies SIEMENS, ŽĎAS and MECAS ESI have been working for welding technologies development based on material&#...

The article focuses on the Analysis of Degradation Mechanisms impacting the heterogeneous welds, which are made of the additional welding material type Sv-10Ch16N25AM6 and on the demonstration of the particular identified degradation mechanisms. The heterogeneous welding joints type N,&#x...

The paper collected experiences and results from development and real operation equipment that reduced the erosion on the immersed heat exchange surface by active way. The equipment is developed and used in fluidized boiler power plant United Energy a.s

The contribution contains results of material analysis of rotating blades of Kaplan turbine of small water power station. Analyses of chemical composition, mechanical properties, and microstructure of blade material were performed. In addition composition of corrosion products was measure...

Energy contributes significantly to CO2 emissions from burning fossil fuels. There are numerous ways to eliminate CO2, promising technology for industrial applications is a method Oxyfuel. In this method, instead of air for combustion is used a mixture of oxygen and CO2...

Current trend of long term operation of NPPs for more than 60 years requires assurance of its safety and reliability. One of the possible solutions how to extend service life of RPV is its thermal annealing, which became a verified technology and its application in...

Contactless optical measurement method for deformation measurement using equipment from Sobriety s.r.o., is characterized by the high precision and simplicity. The measurement is realized by the software MercuryRT with Enter module, which allows a real-time measurement as well as off...

This paper describes a fatigue life methodology and determination of critical points of the turbine rotor by increased frequency of both hot and cold operational starts, followed by methods of evaluation of fatigue damage using the combination of low cycle (fatigue) and �...

Even with the stationary conditions of the operation of the gas turbine, uneven temperature fields arise in the flue tube of the combustion chambers, which are the cause of temperature stresses and deformations. This may in some cases compromise the operation of the &#x...

The paper deals with the most common causes of steam turbine malfunction from the point of view of a court expert. Careful analysis of failures and accidents is an important factor in increasing the reliability of steam turbine operation and is of interest to both&...

Nuclear energy allready experience three severe accidents which are repeating almost every ten years. Therefore it is very important to support research project with key goal to confirm the ability to keep the melted Corium inside the RPV even for reactors with higher &...

The article contains application of measurement results obtained from a new monitoring system MONEZ as input parameters in computational stress and fatigue damage analyzes of selected primary circuit piping components of V2 power plant (Jaslovské Bohunice). MONEZ providing thermal lo...

Repair welding of main SSC (Systems, Structures, and Components) in the company ŠKODA JS a.s. has a long time history. It has been developing and put in to practice technologically demanding repairs of main components of primary circuit in the last years. There wa...

The ageing management program (AMP) is defined as a program to identify all ageing mechanisms that are important to safety-critical systems, constructions and components (SKKs), to determine their possible impacts, and to establish the necessary corrective measures to gain functional...

T-E study is a basic source of information for strategic decisions on operation of the Dukovany NPP after the year 2027. The result of the study are economic calculations on the basis of the outputs from the evaluation device and other areas in the technical p...

First technical economic feasibility study of Dukovany NPP LTO was created in 2006-2008 and its objective was to assess options of long term operation 40, 50 and 60 years. One of the results of this study was suggestion to update the study until 2016 to prepar...