Research and development of high-performance instruments for safety measure for LWRs

Takeuchi, Tomoaki   ; Ueno, Shunji; Komanome, Hirohisa*; Otsuka, Noriaki ; Shibata, Hiroshi ; Kimura, Nobuaki ; Matsui, Yoshinori ; Tsuchiya, Kunihiko ; Araki, Masanori

During the station blackout situation at the Fukushima Dai-ichi (1F) Nuclear Power Plant, conventional in-pile instrumentation systems did not work sufficiently, resulting in the progress of the severe accident. In June 2011, the Japanese government referred to "Enhancement of instrumentation to identify the status of the reactors and PCVs" as a lesson of the accident at the 1F NPP, in the report of Japanese government to the IAEA ministerial conference in accordance with such situation, we started from 2012 a research and development which corresponds to the provisions so as to monitor the NPPs situations during a severe accident. In this research and development, we have been building of technical bases of a radiation-resistant high-definition and high-sensitivity monitoring camera, a wireless transmission system, and radiation- and heat-resistant signal line. The objective and latest progress situations of the R&D including the results of the characteristic experiments will be introduced in this symposium.