Process and apparatus for solidification of radioactive waste
US4671897A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 1, 1985 |
| Grant date | Jun 9, 1987 |
| Priority date | — |
| Expiry date | Feb 1, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG21F9/302
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
Radioactive waste is first converted into hardly water-soluble powder (including a water-insoluble powder) and then solidified with a hydraulic solidifier in a solidification vessel. The radioactive waste may be powdered (including granulated and encapsulated) by incorporating the radioactive waste with a substance which is capable of reacting with the water-soluble salt contained in the radioactive waste to form a hardly water-soluble salt (including a water-insoluble salt) and then powdering the mixture with drying, or by powdering the radioactive waste with drying, granulating the powder with drying and then microencapsulating the granules with a hardly water-soluble substance (including water-insoluble substance). The hardly water-soluble salts are preferably calcium salts, and the additives are preferably calcium hydroxide solution or solvent of combination of dichloromethane solution and hexane.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.