Research on durability of crack detection using optical fiber sensor at Mizunami Underground Research Laboratory

Sato, Toshinori  ; Aoyagi, Yoshiaki; Hirai, Kazuhide*; Sato, Hiroshi*; Sano, Tadashi*

As a part of validation of the technology to ensure safety on the basic development of the engineering technology for deep underground applications, applicability of the optical fiber sensor for crack detection, which developed by Tokyo Sokki Kenkyujo Co.Ltd., is being evaluated as a collaborative research between JAEA and Tokyo Sokki Kenkyujo Co.Ltd. In this study, evaluation of long-term stability of the optical fiber sensor installed in the -300m Stage at the Mizunami Underground Research Laboratory Constriction Site is being conducted.