1. 緒言平成21年4月に確認された東海再処理施設の海中放 出設備の漏えい事象は、漏えい箇所が海底埋設の放出 管であった。漏えいの原因は、放出管の施工時に損傷 し、経年変化として損傷箇所に電気防食で発生した水 素が影響したことで水素脆性割れが起こり、き裂が発 生、さらには水素誘起割れによりき裂が進展し貫通し たことによるものと推定した。損傷箇所に水素脆性割れが生じる原因となった水素 は電気防食によるものであり、このときの防食電位と 水素発生の関係等の調査を行った。この結果、損傷が 素が影響したことで水素脆......
英字タイトル:
Liquid leakage from the sea release pipe of the Tokai reprocessing plant estigation into the cause of the leak (3): Preventive measures against recurrences and the management metho - Investigation into the cause of the leak (3): Preventive measures against recurrences and the management method

Many facilities, in Tokai Reprocessing Plant, are necessary for safety aspects a s well as plant operation. It is essential to keep instruments running, especia lly for safety features such as ventilation system for sealing radio activities in the facility and cooling system for removing decay heat. The preventive main nance schedule for instruments of safety features was planned based on validity date of electric parts or decided with usage environment, working situation an recommended limit of time, in ...
英字タイトル:
Maintenance of electric parts in the Tokai Reprocessing Plant

Uninterruptible power supply systems are installed in the Tokai reprocessing plant in preparation for the emergency case the commercial power supply is stopped by an accidental or intentional interruption in the supply of electricity. The terruptible power supply system particularly provides a temporary power source to the i mportant devices for the ation control of nuclear critical monitoring in the plant. Thus, the system is potentially important and essential for wear plants. The pap er repots the curr...
英字タイトル:
Maintenance management of emergency power supply equipment(uninterruptible power supply) in Tokai reprocessing plant