Preliminary evaluation on in-core emission analysis in new JMTR

Watahiki, Shunsuke; Nakamichi, Masaru; Naka, Michihiro ; Saito, Takashi; Ide, Hiroshi  ; Miyazawa, Masataka; Ishihara, Masahiro ; Kawamura, Hiroshi

The development of in-core remote sensing Technology is essential to aim at the realizayion of advanced irradiation examination in the new JMTR. By observing the in-core on real time and taking out nucleus and thermal information as optical information, the technology may be able to detect a very small change of the in-core, which is undetectable by the usual instrumentation. As a result, a highly accurate irradiation examination can be done. In the present study(work), the spent fuel kept in the spent fuel rack in the canal(water way) of JMTR was recorded with a video camera(visible light), and the brightness of Cherenkov radiation was evaluated from the radiation the obtained image.