Community Research and Development Information Service - CORDIS


The presence of a welded stainless steel cladding layer on carbon steel reactor vessel can seriously affect the ultrasonic inspection due to its coarse grained anisotropic structure and the surface irregularities, leading to beam skewing, scattering and mode conversion of ultrasonic waves.

This paper makes the assessment of the reliability of different inspection procedures based on several international round robin tests. Blind trials conducted up to now show that the capability exists to detect under clad defects 5 mm or more through wall, with a 2 mm standard deviation for depth sizing.

Qualification of inspection procedures with pragmatic targets for defect detection and sizing is necessary to provide reliable information from field inspections for structural integrity assessment.

Additional information

Authors: BIETH M, JRC-Institute Advanced Materials, Tacis-Phare Nuclear Safety, Petten (NL);MONJARET J, JRC-Institute Advanced Materials, Tacis-Phare Nuclear Safety, Petten (NL);FABBRI L, JRC-Institute Advanced Materials, Safety of Industrial Components, Petten (NL)
Bibliographic Reference: Oral report given at: 2nd International Conference on NDE in Relation to Structural Integrity for Nuclear and Pressurized Components. Organised by: JRC and EPRI. Held at: Hotel Inter-Continental, New Orleans, Louisiana (US), 24-26 May 2
Record Number: 200013213 / Last updated on: 2001-03-23
Original language: en
Available languages: en