Abstract
Qualification of non-destructive examination procedures
for in-service inspections of nuclear power plant
components is performed using different types of
artificial flaws. The assessment of the reliability of a
procedure requires sufficiently representative flaws
compared to the real service-induced flaws.
Fatigue cracks can nowadays be produced artificially as
thermal fatigue or mechanical fatigue cracks. Thermal
fatigue crack production is very well controlled in
matter of size and opening. That kind of cracks are very
realistic option compared to the real service-induced
cracks. Mechanical fatigue crack production is well known
and widely used method and can produce very realistic
cracks as well.
Ultrasonic indications are highly dependent on defect
characteristics like roughness, crack opening, tilt and
branching. This work studies the influence of different
reflector properties on flaw indications. Two kinds of
artificial cracks from different manufactures and one EDM
reference notch were made in austenitic stainless steel
test blocks. Flaws were examined using phased array
ultrasonic testing (PAUT), scanning acoustic microscope
(SAM) and time-of- flight diffraction (TOFD) techniques.
Flaw images produced by two digital radiography
techniques are used as reference. The aim of the study is
to get a wider perspective to the differences in similar
type of flaws from different manufacturers.
| Original language | English |
|---|---|
| Title of host publication | 10th International Conference on NDE in Relation to Structural Integrity for Nuclear and Pressurized Components |
| Pages | 428-435 |
| Publication status | Published - 2013 |
| MoE publication type | A4 Article in a conference publication |
| Event | 10th International Conference on NDE in Relation to Structural Integrity for Nuclear and Pressurized Components - Cannes, France Duration: 1 Oct 2013 → 3 Oct 2013 |
Conference
| Conference | 10th International Conference on NDE in Relation to Structural Integrity for Nuclear and Pressurized Components |
|---|---|
| Country/Territory | France |
| City | Cannes |
| Period | 1/10/13 → 3/10/13 |
Keywords
- ultrasonic testing
- phased array (PA)
- scanning acoustic microscope (SAM)
- time-of-flight diffraction (TOFD)
- digital radiography
- thermal fatigue crack
- mechanical fatigue crack
- indication