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Fiber optic probe for in-situ inspection of surface cracks in steam generator tubes

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Show simple item record López Vázquez, José Carlos Fernández Doval, Ángel Manuel Vázquez Dorrío, José Benito Bugarín Diz, Javier Alén de la Torre, José María Fernández Fernández, José Luis Perez-Martinez Perez-Amor, Mariano Jesus González Tejedor, Benjamín
dc.contributor.editor SPIE spa 2019-04-26T10:37:17Z 2019-04-26T10:37:17Z 1999-09-15
dc.description.abstract The automatic inspection of cracks in the inner side of steam generator tubes is routinely carried out using eddy currents techniques. These methods are mature and have quite high performance but the achievable resolution is relatively low (approximately 1 mm) and present drawbacks related to the reliability of the inspection of the areas of tubes at the neighborhood of the supporting plates. Several years ago we have proposed a solution to these limitations based on a new fiberoptic reflectometric technique that has already been theoretically and experimentally analyzed using a first laboratory prototype. In this work we describe a second generation prototype that is integrated in a whole inspection system that could perform an inspection in the field. The results obtained over cylindrical tubes with inner diameter 16.8 mm (corresponding to real steam generator tubes) with cracks created by electrical disintegration and by stress- corrosion and employing conditions close to real operation confirm our previous conclusions: both circumferential and axial cracks of widths as small as 30 micrometer can be detected and measured and typical resolution capability of 10 line pairs/mm can be obtained. spa
dc.description.sponsorship TECNATOM S.A. spa
dc.description.sponsorship UNESA (Asociación Española de la Industria Eléctrica) spa
dc.language.iso eng spa
dc.title Fiber optic probe for in-situ inspection of surface cracks in steam generator tubes spa
dc.type conferenceObject spa
dc.rights.accessRights openAccess spa
dc.identifier.doi 10.1117/12.364290
dc.identifier.editor spa
dc.publisher.departamento Física aplicada spa
dc.conferenceObject.type Comunicación extensa internacional spa
dc.identifier.conferenceObject Industrial Lasers and Inspection (EUROPTO Series), Munich, Alemania, 15-16 junio 1999 spa
dc.publisher.grupoinvestigacion Grupo de Óptica Física spa
dc.subject.unesco 3311.11 Instrumentos Opticos spa
dc.subject.unesco 2209.05 Fibras Ópticas spa 2019-04-24T16:40:25Z

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