Process for treating radioactive wastes
US4268409A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 17, 1979 |
| Grant date | May 19, 1981 |
| Priority date | — |
| Expiry date | Jul 17, 1999 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG21F9/30
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An aqueous solution containing granular ion exchange resin and filter aid as a radioactive waste generated from a nuclear power plant is supplied to the casing of a centrifugal film dryer, which comprises a casing, a rotating shaft inserted in the casing, rotating blades fixed to the rotating shaft within the casing, and a heating means for heating the wall surface of the casing. The aqueous solution flows down along the heated inside wall of the casing while the rotating shaft is rotated. Water of the aqueous solution is evaporated, while the granular ion exchange resin and the filter aid are turned into powder by the action of rotating blades in rotation. The powder is led to a pelletizer, and shaped into pellets. The pellets are filled in a drum, and asphalt is then filled in the drum. After the solidification of the asphalt, the drum is tightly sealed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.