In order to restart the Research Reactor Trico II, nuclear components are inspected using two main Non-Destructive Testing (NDT) methods, namely Visual Inspection (VI) and Ultrasonic Testing (UT). Visual method was needed to inspect the TANK using underwater camera ARECONT VISION and the USB2.0 endoscope. Ultrasonic method was needed to inspect octagonal concrete structure using a flaw detector Proceq Pundit PL-200PE for uniformity and quality controls. The inspection showed that the reactor tank has not been degraded. Indeed, out of about one hundred photos taken with both underwater cameras, only two shows small degradations on the tank wall. One concerns the horizontal ring 1, which is not well sticked on the tank wall. The second concerns the vertical weld (CV1), which shows a visible spot on the weld due probably to dust accumulation. The biological protection layer of the octagonal concrete structure is not also degraded. The calculated concrete structure elasticity modulus is given by 𝑮 = 𝟏𝟗𝟐 𝟓𝟓𝟖,53±𝟒𝟑𝟖𝟏𝟏, 𝟗𝟑 Mpa.
For its restart, components of research reactor TRICO II are subject of Non-Destructive Testings (NDT). Its STAHL hoist lifting hook 5000kg was inspected by colored liquid penetrant method for the research of surfaces defects, through white light in 750 lux. Result obtained indicates that it is not degraded. Indirect visual inspection by the multifunction video endoscope KC 350 was used to control internal wall of heat exchanger secondary circuit piping, some photos of internal wall were captured. The ultrasonic method consisted in measuring thickness of internal and external part of piping of the heat exchanger secondary circuit using thickness gauge ATG II with builtin 4.00mm calibration block. Results obtained by visual inspection showed the presence of rust and corrosion. The ultrasonic method showed thickness variation on controlled surface due to deposit rust (high value of thickness) and corrosion (low value of thickness). This work is carried out as part of maintenance, periodic testing and inspection for proper management of the TRICO II reactor.
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