Method for dry process recycling of mixed (U,Pu)O2 oxide nuclear fuel waste
US6783706B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 24, 2001 |
| Grant date | Aug 31, 2004 |
| Priority date | — |
| Expiry date | Jul 24, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E30/30
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A method for dry process recycling of mixed (U,Pu)O2 oxide nuclear fuel waste, including a process for making fuel pellets of mixed (U,Pu)O2 oxide, including a dosage and a first mixture (1) of waste in powder form and, if required, of PuO2 and/or UO2 powders, a micronization (2) and a forced sieving (3) of said first mixture, another dosage and a second mixture (4) of the first sieved mixture, of UO2 powders and, if necessary, of the waste powder, pelletizing (6) the second mixture, and sintering (7) the resulting pellets; and a process for pre-treating the waste including pelletizing (20) and sintering (21) the powder waste to form waste pellets, and micronizing (23) the waste pellets to form the desired waste powder designed to be incorporated as waste powder, in the first (1) and/or second mixtures.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.