The Diagnostic Method of Inner Parts of Welded Joints at Nuclear Power Plant

Journal Article · Tue Jun 22 00:00:00 EDT 2010 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.4757166· OSTI ID:21410489

Bednarova, O; Janovec, J ^[1]

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1. Department of Materials Engineering, Mechanical Engineering Faculty, Czech Technical University in Prague, Karlovo namesti 13, 121 35 Prague 2 (Czech Republic)

There is no possibility to check any inner part at real welded joint at nuclear power station (NPS) during operation because any destructive test cannot be used. In practice there is checked surface of weld. There are used four methodical instructions for the check of real welds: 1. The visual inspection, 2. The measurement of hardness, 3. The chemical composition checking and 4. The microstructure replica analysis. It is necessary to know how these information of weld surface are in accordance with characteristics of inner parts of weld. If there is not any difference between surface weld microstructure and internal weld microstructure of experimental weld it is supposed to that there is not any difference in other measured properties of welds. If is changed structural characteristics of microstructure, it is changed also hardness, chemical analysis etc. It was observed that the microstructure of real welds is almost the same with simulated weld and also the surface microstructure of experimental weld is in accordance with microstructure of inner parts of this weld. It can be supposed extension of lifetime of NPS if there is not any difference between replicas microstructure taken after six year operation of NPS and microstructure of inner parts of simulated weld is almost the same with surface microstructure.

• OSTI ID: 21410489
• Journal Information: AIP Conference Proceedings, Vol. 1244, Issue 1; Conference: ICANSE 2009: 2. international conference on advances in nuclear science and engineering 2009, Bandung (Indonesia), 3-4 Nov 2009; Other Information: DOI:; (c) 2010 American Institute of Physics; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
22 GENERAL STUDIES OF NUCLEAR REACTORS
CHEMICAL ANALYSIS
CHEMICAL COMPOSITION
CRYSTAL STRUCTURE
FATIGUE
HARDNESS
LIFETIME
MICROSTRUCTURE
NUCLEAR POWER PLANTS
SIMULATION
SURFACES
WELDED JOINTS
WELDING
FABRICATION
JOINING
JOINTS
MECHANICAL PROPERTIES
NUCLEAR FACILITIES
POWER PLANTS
THERMAL POWER PLANTS