東海再処理工場における保守技術開発に関する分析評価

抄録

  The Tokai reprocessing plant (TRP) has thus far processed over 1,123 t of spent fuels from the beginning of its active operation in Sept. 1977. For the 30 years of operation of TRP, many technological problems have been overcome to obtain its stable and reliable operation. The process for the establishment of maintenance technology in TRP was evaluated through the analysis of significant plant equipment failures reported to the authorities concerned. Through these troubles and their solution, the following knowledge could be obtained.
(1) Dimensional tolerance data were indispensable for the remote maintenance of mechanical parts.
(2) Ensuring remote maintenance technology was necessary for the early restoration of stable operation from equipment failure.
(3) Direct maintenance for equipment in the cell should be performed following preventive work planning under a strict safety organization and its rule.
(4) Preparation of spare parts or spare cells was an effective approach for reducing difficulty in maintenance work caused by technical problems or cost.
(5) To perform the checking of operability and maintainability, premeditated stopping of plant operation was effective for establishing stable operation.
This knowledge of maintenance technology could contribute to the safe and stable operation of the Rokkasho reprocessing plant (RRP) and the design and construction of the next reprocessing plant.