scholarly journals Non-Destructive Testing for Ageing Management of Nuclear Power Components

10.5772/17581 ◽  
2011 ◽  
Author(s):  
Gerd Dobmann
Keyword(s):  
Nuclear Power ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Ageing Management ◽  
Non Destructive

Non-destructive testing of equipment and pipelines in nuclear power plants with RBMK

Atomic Energy ◽  
2012 ◽  
Vol 113 (1) ◽  
pp. 57-63
Author(s):  
Yu. G. Dragunov ◽  
B. P. Strelkov ◽  
A. A. Arefyev ◽  
A. S. Mokrousov ◽  
N. G. Roshchin
Keyword(s):  
Nuclear Power ◽  
Power Plants ◽  
Nuclear Power Plants ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Equipment And Pipelines ◽  
Non Destructive

SOME ASPECTS OF NON-DESTRUCTIVE TESTING OF EQUIPMENT AND PIPELINES OF NUCLEAR POWER PLANTS

2021 ◽  
pp. 20-26
Author(s):  
V. M. Ushakov
Keyword(s):  
Nuclear Power ◽  
Power Plants ◽  
Nuclear Power Plants ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Energy Agency ◽  
Safety Standards ◽  
Equipment And Pipelines ◽  
Non Destructive

Topical aspects of non-destructive testing (NDT) of equipment and pipelines of power units of nuclear power plants (NPP) are considered. Non-destructive testing is an integral part of the entire life cycle of a nuclear power plant. Briefly analyzed documentation and types of non-destructive testing at the stage of manufacturing equipment and pipelines. Power of ultrasonic testing of welded joints of pipelines with a thickness of 2 to 6 mm. The main points of drawing up technological maps of non-destructive testing are noted. A brief analysis of the application of non-destructive testing in accordance with the requirements of the regulatory documents of the Russian Federation and the safety standards of the International Atomic Energy Agency is provided. It is shown that in recent years there has been a tendency to expand the role of NDTs from the classical approach of detecting and assessing defects to the use of NDTs in the study of metal degradation and ageing processes during the operation of NPP equipment and pipelines.

THE NON-DESTRUCTIVE TESTING FOR AGING MANAGEMENT OF EQUIPMENT AND PIPELINES AT NUCLEAR POWER PLANTS. REVIEW

2020 ◽  
pp. 6-18
Author(s):  
V. M. Ushakov ◽  
S. G. Evtushenko ◽  
A. D. Zhukov ◽  
A. S. Yurechko
Keyword(s):  
Nuclear Power ◽  
Power Plants ◽  
Nuclear Power Plants ◽  
Noise Analysis ◽  
Efficient Solutions ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Degradation Factor ◽  
Equipment And Pipelines ◽  
Non Destructive

The paper presents some approaches and methods for assessing and evaluation of different properties of equipment and pipelines metal of nuclear power plants during an operation such as a stress-strain state, a temperature and electrochemical effects. A problem statement for ageing management is considered for such metal properties of the heat – bearing agents. For this purpose, an observation of literature is provided for non – destructive testing (NDT) methods that have a correlation to a degradation factor defined by certain properties. There is has been made a case to apply NDT methods as a promising tool for an estimation and evaluation of degradation factor for a metal of potentially hazardous equipment. For this purpose there are proposed some rational and efficient solutions likes of acoustic methods based on structural – reverberation noise analysis, electromagnetic methods based on a coercive field strength deviation and electrical methods based on principles of potentiometry.

scholarly journals Investigation of the probability of existence of defects with a size exceeding the allowed value

2020 ◽  
Vol 16 (5) ◽  
pp. 414-423
Author(s):  
Dmitry A. Kuzmin ◽  
Alexander Yu. Kuzmichevsky ◽  
Marina V. Vertashenok
Keyword(s):  
Nuclear Power ◽  
Control Point ◽  
Reactor Vessel ◽  
Actual State ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Work Permit ◽  
Residual Defect ◽  
Initial Event ◽  
Non Destructive

Relevance. Non-destructive testing of metal determines the actual state of the metal, the presence of discontinuities and their sizes, and also allows to determine what mechanisms of metal degradation were subjected to. One of the main characteristics of the quality of non-destructive testing is the detectability of discontinuities and defects. If no defects were missed, then its possible to guarantee the reliable operation of the facility until the next scheduled inspection. The article is devoted to the study of the probability function of detecting defects and determining the probability of the existence of a residual defect with a size exceeding the permissible value. The aim of the work - to develop a method to determine the probability of the existence of a residual defect with a size exceeding the permissible value after non-destructive testing and repairs of equipment and pipelines of a nuclear power plant. Methods. During the work formulas for the probability of detecting a defect and initial defectiveness, regulatory requirements in the field of certification of flaw detectors, and the results of research on non-destructive testing were used. Results. A method for determining the probability of defects with a size exceeding the allowed value, using the example of a reactor vessel, is presented. The method is based on residual defects, which takes into account the detectability of defects. The value of the coefficient that takes into account the influence of the human factor, instrument and methodological shortcomings or complexity of access to the control point is determined, which reduces the degree of uncertainty in determining the residual defect. The results of this work permit to evaluate the probability of the existence of a defect with a size exceeding the allowed value. The development of a residual defect to critical values characterizes the initial event for the destruction of the integrity of the structure. Thus, the probability of a residual defect can be used when performing a safety analysis of the water-water energetic reactor vessel.

Opening Contribution 5: Collaborative Approach to Weld Quality by Designer and Inspector

1966 ◽  
Vol 181 (11) ◽  
pp. 20-29
Author(s):  
C. Atkinson
Keyword(s):  
Welded Joints ◽  
Nuclear Power ◽  
Fatigue Cracking ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Power Stations ◽  
Weld Failure ◽  
The Index System ◽  
The Cost ◽  
Non Destructive

Most engineering components are subject to inspection at some stage, particularly those incorporating welded joints. Often the task of the welder and inspector is hampered by the location of joints in positions difficult of access. This is just one aspect of poor design which could be eliminated by collaboration between designer and inspector at the outset. Up to the present, insufficient attention has been paid by designers to important features such as the weldability of materials, joint geometry, siting of welds, feasibility of heat treatment, and surface finish. The increasing use of non-destructive testing, particularly ultrasonics and radiography, has highlighted inspection problems, and as a result, designers are becoming more aware of their ultimate influence on inspection. Although the aims of the designer and inspector are the same—adequate service performance at lowest cost without danger of shutdown—the designer's interest appears to wane as the inspector's functions become more significant. A prolific cause of weld failure is fatigue cracking caused by stress-concentration at welded joints, yet how many designers realize that the external contour of a weld cannot approach the neat appearance indicated on drawings unless expensive grinding or machining is done? The paper will attempt to explore, with the aid of examples, the avenues where more co-operation is needed between designer and inspector. In addition the paper will present a new concept in the designer/inspector relationship in the form of a ‘failure index’ calculated from a number of variables known at the outset. This is a scheme to enable the designer to anticipate the relative amounts of inspection to be applied to various parts of complicated welded fabrications like those in conventional and nuclear power stations. The index system was devised specially as a collaborative link between designer and inspector in a field where the cost of failure in service can be enormous.

Неразрушающий контроль в нормах безопасности МАГАТЭ и России при управлении старением конструкций, систем и элементов атомных электростанций

2021 ◽  
pp. 61-66
Author(s):  
В.М. Ушаков ◽  
С.Г. Евтушенко
Keyword(s):  
Nuclear Power ◽  
Power Plants ◽  
Nuclear Power Plants ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Energy Agency ◽  
Safety Standards ◽  
Plant Resource ◽  
Analytical Review ◽  
Non Destructive

An analytical review of the safety standards of the International Atomic Energy Agency (IAEA) and documents of the Russian Federation in the field of nuclear power plant resource management is presented. The importance of non-destructive testing in the aging control system of structures, systems and elements of nuclear power plants is shown. The problems of aging management are noted, which can be solved with the help of non-destructive testing. A systematic approach to ensuring safety at all life stages of nuclear power plants is noted: design, construction, production (manufacturing), installation, operation (including extension of the period), reconstruction and decommissioning.

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