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Mukaibo, Ryuichi; Matsuno, Yoshiaki; Sato, Isao; Yoneda, Yoshiyuki; Sato, Hiroshi
Power Reactor and Nuclear Fuel Development Corp., Tokyo (Japan)1978
Power Reactor and Nuclear Fuel Development Corp., Tokyo (Japan)1978
AbstractAbstract
[en] Sodium removal from the grapples of the fuel handling facility of ''JOYO'' is done in alcohol. The operations of the cleaning facility started as the functional tests of the fuel handling facility began. Since then, criticality test and low power tests had been done and during this period, sodium removal from the grapples, after a certain amount of time in use, were done. In order to lessen the time for the cleaning process for the grapples of the machines inside the containment vessel, demineralized water concentration in the alcohol was gained to as much as 10% and good results were obtained. On the other hand, there were very small amounts of sodium on the grapples of the machine used outside the containment vessel and direct charging of demineralized water into the cleaning pot was done experimentally, also with good results. In this report, the sodium removal experience of the grapples before power up tests and some remarks on the improvements of the facility for the future are presented. (author)
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Jan 1978; 28 p
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Report
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