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Report No.
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Development of in-service inspection system for core support graphite structures in the High Temperature Engineering Test Reactor (HTTR)

Sumita, Junya ; Hanawa, Satoshi ; Kikuchi, Takayuki; Ishihara, Masahiro 

Visual inspection of core support graphite structures using TV camera as in-service inspection and measurement of material characteristics using surveillance test specimens are planned in the High Temperature Engineering Test Reactor (HTTR) to confirm structural integrity of the core support graphite structures. For the visual inspection, in-service inspection system has been developed, and pre-service inspection using the system was carried out. As the result of the pre-service inspection, it was validated that high quality of visual inspection with TV camera can be carried out, and also structural integrity of the core support graphite structures at the initial stage of the HTTR operation was confirmed.

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