At the Tokai reprocessing plant, release of the low radioactive waste liquid to the ocean is carried out using sea release facilities. It was found that there was a leak point on the sea release facilities. Therefore, surveillance and confirmation were performed and the leak point was identified. The leak part was cut and the part was then collected to investigate the cause of the leak. As a result, it was estimated that the leak oc curred after the pipe was mechanically damaged and a successive metallurg...
英字タイトル:
Liquid leakage from the sea release pipe of the Tokai reprocessing plant -Summary of ocean-releasing facilities and the leak phenomenon -

At the Tokai Reprocessing Plant (TRP), spent fuels are dissolved in nitric acid and the dissolved liquid is fed to the extractors (mixer settlers). In the mixer settlers, both uranium and pluton ium are extracted by the solvent that contains tri-butyl phosphate. It is important to control the interface between organic and aqueous phase in the settlers And the interface is controlled by the flow control valve. This valve has maintainability problems because it takes a fair amount of time to maintenance. In ...
英字タイトル:
Improvement of the flow control valve in an extractor in Tokai reprocessing plant