Nondestructive testing of Narrow-Gap welded joints using radiographic and ultrasonic methods (in German)
The intensified demand for economical sources of electrical energy has led to nuclear power plants with increasingly larger pressure vessels, particularly for BWR and PWR installations. The wall thicknesses of these vessels now exceeds 200 mm. The fabrication of these heavy structural components to close construction tolerances has required the development of economic welding processes, which in general are fully mechanised. One such process which has been successfully applied to the joining of heavy sections is Narrow-Gap welding. Investigations on Narrow-Gap welded joints using conventional nondestructive testing methods, such as radiographic and ultrasonic methods, have revealed that weld defects in these weld seams can be readily determined since for this process, the possible zones of weld failures are clearly defined over a very small region. The assessment of the test results according to accepted standards for pressure vessel construction has revealed, that providing the welding conditions are carefully controlled, acceptable weld quality is ensured. (orig.)
- Research Organization:
- Fraunhofer-Gesellschaft zur Foerderung der Angewandten Forschung e.V., Bremen (F.R. Germany). Inst. fuer Angewandte Materialforschung
- NSA Number:
- NSA-33-009212
- OSTI ID:
- 4130817
- Journal Information:
- Z. Werkstofftech., v. 6, no. 5, pp. 160-163, Journal Name: Z. Werkstofftech., v. 6, no. 5, pp. 160-163; ISSN ZWKTA
- Country of Publication:
- Germany
- Language:
- German
Similar Records
Application of narrow-gap process
Modeling and validation of multiple joint reflections for ultra- narrow gap laser welding