Guided wave (GW) testing is regularly used for finding defect locations through long-range screening using low-frequency waves (from 5 to 250 kHz). By using magnetostrictive sensors, some issues, which usually limit the application to nuclear power plants (NPPs), can be fixed. The authors have already shown the basic theoretical background and simulation results concerning a real steel pipe, used for steam discharge, with a complex structure. On the basis of such theoretical framework, a new campaign has been designed and developed on the same pipe, and the obtained experimental results are now here presented as a useful benchmark for the application of GWs as nondestructive techniques. Experimental measures using a symmetrical probe and a local probe in different configurations (pulse-echo and pitch-catch) indicate that GW testing with magnetostrictive sensors can be reliably applied to long-term monitoring of NPPs components.

References

References
1.
Turcu
,
F.
,
Cappelli
,
M.
,
Mazzini
,
D.
,
Pistelli
,
S.
, and
Raugi
,
M.
,
2014
, “
In-Service Inspection and On-Line Monitoring of Inaccessible Components in Nuclear Power Plants Using Guided Wave Technology
,” Paper No. ICONE22-31107.
2.
Kwun
,
H.
,
Kim
,
S. Y.
, and
Light
,
G. M.
,
2011
, “
Magnetostrictive Sensor Technology for Long-Range Guided Wave Inspection and Monitoring of Pipe
,”
NDT Tech.
,
10
(
2
), pp. 6–9.
3.
Cawley
,
P.
,
Cegla
,
F.
, and
Galvagni
,
A.
,
2012
, “
Guided Waves for NDT and Permanently Installed Monitoring
,”
18th World Conference on Nondestructive Testing
, April Durban, South Africa, pp.
16
20
.
4.
Tadeusz
,
S.
,
2011
, “
Structural Health Monitoring of Piping in Nuclear Power Plants: A Review of Efficiency of Existing Methods
,” The Swedish Radiation Safety Authority, Uppsala University, Sweden, Report No.
2011:17
.https://inis.iaea.org/collection/NCLCollectionStore/_Public/43/128/43128035.pdf
5.
Pei
,
K.
,
Shyu
,
H.
,
Lee
,
P.
, and
Toung
,
J.
,
2015
, “
Development and Application of Guided Wave Technology for Buried Piping Inspection in Nuclear Power Plant
,”
IEEE Ultrasonics Symposium
(
IUS
), Taipei, Taiwan, Oct. 21–24, pp. 1–4.
6.
Kwun
,
H.
,
Mader
,
E. V.
, and
Krzywosz
,
K. J.
,
2009
, “
Guided Wave Inspection of Nuclear Fuel Rods
,” Seventh International Conference on NDE in Relation to Structural Integrity for Nuclear and Pressurized Components, Yokohama, Japan, May 12–15.
7.
Charchuk
,
R.
,
Werstiuk
,
C.
,
Evans
,
M. J.
, and
Sjerve
,
E.
,
2012
, “
High Temperature Guided Wave Pipe Inspection
,”
Fourth International CANDU In-Service Inspection Workshop and NDT Conference
, Toronto, ON, Canada, June 18–21, pp. 18–21.https://www.ndt.net/article/ndt-canada2012/content/papers/50_Sjerve.pdf
8.
Fong
,
J.
, and
Evans
,
M.
,
2016
, “
Guided Wave Testing (GWT) of High Temperature Piping
,”
19th World Conference on Non-Destructive Testing
, Munich, Germany, June 13–17, pp. 1092–1097.https://www.ndt.net/article/wcndt2016/papers/fr2i2.pdf
9.
Bertoncini
,
F.
,
Cappelli
,
M.
,
Cordella
,
F.
, and
Raugi
,
M.
,
2017
, “
An Online Monitoring Technique for Long-Term Operation Using Guided Waves Propagating in Steel Pipe
,”
ASME J. Nucl. Eng. Radiat. Sci.
,
3
(
4
), p.
041008
.
10.
Bertoncini
,
F.
,
Cappelli
,
M.
,
Cordella
,
F.
, and
Raugi
,
M.
,
2017
, “
Guided Waves as an Online Monitoring Technology for Long Term Operation in NPPs: New Experimental Results on a Steam Discharge Pipe
,”
ASME
Paper No. ICONE25-67444.
11.
Bertoncini
,
F.
,
Cappelli
,
M.
,
Cordella
,
F.
, and
Raugi
,
M.
,
2016
, “
Non-Invasive On-Line Monitoring for Nuclear Power Plants Using Guided Waves Propagating in Steel Pipes With Different Types of Structural Complexity
,”
ASME
Paper No. ICONE24-60885.
12.
Bertoncini
,
F.
,
Oprea
,
C.
,
Raugi
,
M.
, and
Turcu
,
F.
,
2009
, “
Defect Identification by Flexural Component Evaluation in Guided Wave Monitoring of Pipework Using a Magnetostrictive Sensor
,” Dipartimento di Sistemi Elettrici e Automazione, Università di Pisa, Italy.
13.
Viola
,
E.
, and
Marzani
,
A.
,
2007
, “
Exact Analysis of Wave Motions in Rods and Hollow Cylinders
,”
Mechanical Vibration: Where Do We Stand
?,
I.
Elishakoff
, ed.,
CISM International Centre for Mechanical Sciences
, Springer-Verlag, Wien, Austria.
14.
Kwun
,
H.
,
Kim
,
S.
, and
Crane
,
J. F.
,
2002
, “
Method and Apparatus Generating and Detecting Torsional Wave Inspection of Pipes or Tubes
,” Patent No.
US 6,429,650 B1
.https://patents.google.com/patent/US6429650
You do not currently have access to this content.