Japan experimental fast reactor "JOYO" operation report; Incidents recorded during operation (April 1980 March 1981)

Nakano, Makoto*; not registered; not registered; not registered; not registered; not registered; not registered

This reports deals with the incidents recorded during the period from April 1980 to March 1981. During this period JOYO operated the second, third and the half of forth normal operation cycles with the second annual maintenance. JOYO has 247 reported incidents and troubles in this period. 0f these 17% were associated with the secondary sodium cooling system and 16% with the service building air conditioning system. During this period the frequency of incidents involving instrument is highest and amounted to 17% of total numbers of incidents however, that of valves, detectors, control panels, piping and cabling, and belts are also high.