Artificial multi-barrier for a radioactive waste treatment facility
US8647015B2 · kind B2 · utility
1Cited by
10References
12Claims
0Family size
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Key dates
| Filing date | Jun 15, 2009 |
| Grant date | Feb 11, 2014 |
| Priority date | — |
| Expiry date | Dec 5, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W30/91
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A concrete pit containing radioactive waste is surrounded by a low diffusion layer of cement-based material, which in turn, is surrounded by a low water permeability layer of sodium-type bentonite and the leaching out of calcium ions from the low water permeability layer is inhibited by mixing sodium bicarbonate or sodium carbonate with the sodium-type bentonite/sand mixture of the low water-permeability layer so that leached calcium ions form a barrier layer having calcium carbonate as the main component in the vicinity of the interface between the layers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.