Fast Photothermal Inspection of Plasma-Sprayed Coatings of Primary Circulation Seal Rings of a Nuclear Reactor. Part Two: After the Trial Run
In the 1991 QNDE conference  we described a photothermal inspection of the plasma-sprayed coatings of two seal rings used in the main pump of the primary circulation in the PWR-type nuclear reactor. The measurements concentrated on detecting the most critical flaw type, adhesion defects at the interface between the coating and the substrate. The samples were tested immediately after they were coated and lapped, and already then two thermal anomalies could be found.
KeywordsThermal Image Rotor Ring Seal Ring High Thermal Diffusivity Main Pump
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- 1.R. Lehtiniemi, J. Hartikainen, J. Rantala, J. Varis, and M. Luukkala, in Review of Progress in Quantitative NDE, Vol. 11 A, edited by D. O.Thompson and D. E. Chimenti (Plenum Press, New York, 1991 ), p. 441.Google Scholar