Present status of refurbishment and irradiation technologies in JMTR

Inaba, Yoshitomo  ; Ishihara, Masahiro ; Niimi, Motoji; Kawamura, Hiroshi

The Japan Materials Testing Reactor (JMTR) is a testing reactor with first criticality in March 1968. JMTR has been utilized for various neutron irradiation tests on nuclear fuels and materials, as well as for radioisotope production. The operation of JMTR was stopped in August 2006 for the refurbishment and the improvement. The renewed JMTR will be operated from FY 2011. Aiming at the restart of the new JMTR, the renewal of the aging reactor components, the preparation of the new irradiation facilities, and the development of the irradiation technologies have been carried out in JMTR. The irradiation facilities and technologies can also contribute to the development of fusion reactor materials. In this paper, the present status of the refurbishment and the irradiation technologies focused on the instrumentation in JMTR are described.