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Ono, Yosuke
no journal, ,
no abstracts in English
Kuba, Meiji
no journal, ,
The Plutonium Fuel Fabrication Facility (PFFF) is now in its decommissioning phase. Now, terminated gloveboxes have been dismantled. Gloveboxes to be dismantled are surrounded by a plastic enclosure to prevent contamination from being spread into process room. In this plastic enclosure, dismantling operations for gloveboxes are performed manually by workers, each wearing an air-feed suit. This dismantling methodology is technically well-established and relatively easy to implement. However, the mental and physical loads placed on workers wearing the air-feed suits are intensively high. Therefore, R&Ds on new dismantling technologies including utilization of heavy machines covered with plastic enclosure for anti-contamination have been started to reduce the potential risks associated with workers and decommissioning costs. In this meeting, the status of decommissioning of the PFFF and the overview of developed dismantling methods for alpha-tight gloveboxes are described.
Sugitsue, Noritake
no journal, ,
We explain overview of a Ningyo-Toge center, Dismantling and decontamination project, And typical technical result of dismantling and decontamination technology. The Ningyo-toge center starts in the uranium ore deposits discovery in 1955. Then, we performed exploration, refining and conversion, uranium enrichment as a research center of a front -end. The present main project is the decommissioning Main technical assignment, Technology for Storage of the depleted uranium stably, Uranium removal and recovery from contaminated fluoride, and reuse technology, System chemical decontamination by the IF
gas, Centrifugal treatment system, Verification of the clearance level technology, And system engineering Main technology is in a practical use stage. However, stabilization of depleted uranium and the method of contaminated fluoride processing are remain is a subjects. In the Ningyo-Toge center, Use such technology and full-dress dismantling is started from the 2008 fiscal year.