Non-destructive examination with infrared thermography system for ITER divertor components

Development of the plasma facing components in Japan for ITER

“…The OVT pre-prototype has been non-destructive tested in an infrared thermography test facility to verify the soundness of the bonding interface of CFC armored part. As a result of the infrared thermography test [8,9], all the CFC monoblocks showed excellent cooling performance in the infrared thermography test except for one questionable monoblock. Based on this result, the fixation jigs for the CFC monoblocks during the brazing process has been modified to avoid generation of such questionable braze interface of CFC monoblocks.…”

Development of residual thermal stress-relieving structure of CFC monoblock target for JT-60SA divertor

“…5, was also manufactured for comparison. In order to evaluate heat removal capacity of the mock-ups, infrared thermography inspection using the FIND facility [4,5] was carried out on the mock-ups. In this test, temperature of mock-ups is captured by infrared thermography camera, during quick change of water temperature in the cooling tube from hot water (95 • C) to cold water (5 • C).…”

Evolution of the ITER program and prospect for the next-step fusion DEMO reactors: status of the fusion energy R&D as ultimate source of energy

“…In the EDA, various elements for high heat flux components were developed and fabricated by the four parties. High heat cycle tests showed that carbon fiber composite (CFC) monoblock survived 2000 cycles at 20 MW and the tungsten armors survived 15 MWm −2 for 1000 cycles without degradation of the thermal performance [16][17][18]. The structural housing named "divertor cassette" was also fabricated with a required tolerance and was confirmed to withstand the thermal and mechanical loads to be imposed during ITER normal operation and transients.…”