The ultrasonic (UT) measurements have a long history of utilization in the industry, also in the nuclear field. As the UT transducers are developing with the technology in their accuracy and radiation resistance, they could serve as a reliable tool for measurements of small but sensitive changes for the nuclear fuel assembly (FA) internals as the fuel rods are. The fuel rod bow is a phenomenon that may bring advanced problems as neglected or overseen. The quantification of this issue state and its probable progress may help to prevent the safety-related problems of nuclear reactors to occur—the excessive rod bow could, in the worst scenario, result in cladding disruption and then the release of actinides or even fuel particles to the coolant medium. Research Centre Rez has developed a tool, which could serve as a complementary system for standard postirradiation inspection programs for nuclear fuel assemblies. The system works in a contactless mode and reveals a 0.1 mm precision of measurements in both parallel (toward the probe) and perpendicular (sideways against the probe) directions.

References

References
1.
Schrire
,
D.
,
Josefson
,
B.
,
Larsson
,
J.
,
Apelqvist
,
R.
,
Tejland
,
P.
, and
Corleoni
,
F.
,
2014
, “
Post-Irradiation Examination of a Bowed PWR Fuel Rod With Contact
,” WRFPM 2014, Sendai, Japan, Sept. 14–17, Paper No.
100155
.https://inis.iaea.org/search/search.aspx?orig_q=RN:47079962
2.
Sinclair
,
A. N.
, and
Chertov
,
A. M.
,
2014
, “
Radiation Endurance of Piezoelectric Ultrasonic Transducers – a Review
,”
Ultrasonics
,
57
, pp.
1
10
.
3.
Rabochová
,
M.
, and
Mohyla
,
R.
,
2018
, “
Testování Zařízení v Extrémních Podmínkách - Nová Gama Ozařovna v Centru Výzkumu Řež se Představuje
,”
Československý Časopis Pro Fyziku
,
68
, p.
176
.
4.
Kopeć
,
M.
, and
Malá
,
M.
,
2017
, “
Fuel Assembly Deformation Measurements
,”
12th International Conference on WWER Fuel Performance, Modelling and Experimental Support
, Nessebar, Bulgaria, Sept. 16–23, pp.
455
462
.
5.
Malá
,
M.
,
2016
, “
An Overview of the PIIP Program on TVSA-T Fuel at Temelín NPP
,”
International Conference VVER 2016 Power Uprates, Long Term Operation and New Builds
, Prague, Czech Republic, Oct. 31–Nov. 2, p.
51
.
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