Martensitic steel CB2 (GX13CrMoCoVNbNB-1011) is the result of research conducted in international European cooperation COST. Little information on the CB2 material properties is in the literature. The study of mechanical properties, including long-term creep behaviour of steel CB2 was...

This paper deals with isothermal ageing induced changes in microstructure and its influence into mechanical properties. Investigated material was high alloyed austenitic steel HR3C in general worldwide applied for the ultra-supercritical (USC) powerplants. Differences in the measured mechanica...

Martensitic steel of grade P92 designed for working temperatures around 600 ° C changes its impact toughness after the first hours of thermal ageing. This change is manifested mainly by shifting the impact transition temperature from below to above 0 °C. This paper �...

Information system LTOs currently running at DV Production CEZ, a.s. is used for requirements of Ageing management of equipment and for support of preparation for Long Term Operation in the area of nuclear energetics. Aim of the article is to reveal new functionalities...

The silicone replica sampling allows non-destructive assessment of engineering surfaces without any affect to the integrity of operated systems. The characteristics of the original surfaces could be evaluated via replicas in the laboratory, without any limitation by the specifics of&...

This paper deals with an evaluation of mechanical properties and microstructures of similar and dissimilar narrow gap orbital welds of martensitic P91 and P92 steels after long-term laboratory ageing at elevated temperatures (up to 700 °C for up to 30 000 hours). As &#x...

Active thermography and its approaches are introduced in this contribution. Possibilities of active thermography are demonstrated on two examples – inspection of steel walls and inspection of components at cyclic loading. Example of an inspection of a corrosion loss at rear ...

Microbial low pressure loop is an experimental device that allows long-term corrosion testing of construction materials in a cooling water environment with the potential for biological recovery. In the last two years, a long-term EPRI test was conducted for the corrosion of...

Water chemistry of steam/water cycle system influences on production effectivity and lifetime of equipment. Minimisation of deposit formation on heat-exchange surfaces and minimisation of corrosion on components of steam/water cycle system is the main aim. Different recommendations c...

NPP Dukovany solves the termination of some spare parts production. With regard to the further operation it is necessary to frontload for the period of the expected operation or for the period before the planned renewal. The paper deals with the number of spare par...

Paper is aimed at critical assessment of requirements on construction surveys given in international and national standards and Program of reliability management of company CEZ a.s. Selected results of international projects, handbooks and discussions with experts are considered. It ...

The period of automated testing on WWER type nuclear power stations started in ŠKODA Plzeň company in 1982 by the in-service inspection of reactor pressure vessel of V-1 power station (EBO) Unit 2 from the inner surface. Short look back, interesting information and �...

The degradation of mechanical properties of metallic materials can lead to loss of reliability and safety of machines and metal structures in power plants during their operation. Nondestructive sampling techniques can be used to predict the residual life of the components a...

Introduction of this paper briefly introduce into application of the cladding tubes under specific degradation conditions. One of the specific applications of cladding tubes can be for power boilers, respectively for heat exposed boiler parts. It is necessary keep in mind heat&#x...

Experimental quality assessment of NiCr and NiCrMoW thermal metal coatings IGS 5-450 and 5-470 was performed on newly created coatings without operating load. The quality was evaluated according to the homogeneity, hardness and thickness of the layer, frictional resistance and r...

The paper presents in brief selected results of the Competence Centre Project “Centre of research and experimental development of reliable energy production” achieved in 2016. The project solving started in 2012, since 2016 the project has been solved according to its actua...

In terms of solving projects TACR and MPS there were performed a lot of welding experiments and measurement the material data for steels 10Gn2MFA, P91, P92 and X23CrMoV12-1 with aim to describe and understand processes that accompany own welding process. Thus as a ...