Patent US4839102A successfully refreshed from Google Patents.
US4839102A
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US
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Block for containing and storing radioactive waste and process for producing such a block
Assignee: Commissariat à l'Énergie Atomique et Aux Énergies Alternatives
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Filing: 1987-11-30
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Granted: 1989-06-13
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Expires: 2007-11-30
Abstract
Abstract The present invention relates to a block for containing and storing radioactive waste, as well as to a process for producing such a block. In known manner, the waste is coated in a composite matrix constituted by hardened cement and epoxy resin. According to the invention, the proportion of waste is between 35 and 45% by weight, the porportion of cement between 25 and 35% by weight and the proportion of resin between 20 and 40% by weight.
Inventors
- 👤 Claude Kertesz
- 👤 Gerard Koehly
- 👤 Frank Josso
- 👤 Andre Bernard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:08
CPC Classifications
G; G21; G21F; G21F9/00; G21F9/28; G21F9/30; G21F9/301; G21F9/302; G21F9/304; G21F9/04; G21F9/06; G21F9/16; G21F9/162; G21F9/165; G21F9/167; G21F9/307
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
108 words
Block for containing and storing acidic waste, in which the waste is coated in a composite matrix of hardened cement and epoxy resin, wherein the proportion of waste is between 35 and 45% by weight, the proportion of cement is between 25 and 35% by weight, and the proportion of resin is between 20 and 40% by weight; the block being produced by mixing the waste with the cement to form a mixture; adding to the mixture water in a quantity adequate for hydration of the cement; mixing the hydrated cement product obtained with epoxy resin; and allowing the cement and resin to harden, to produce the block.
Claim 2
Dependent Claim
108 words
Block for containing and storing acidic waste, in which the waste is coated in a composite matrix of hardened cement and epoxy resin, wherein the proportion of waste is between 35 and 45% by weight, the proportion of cement is between 25 and 35% by weight, and the proportion of resin is between 20 and 40% by weight; the block being produced by mixing the waste with the cement to form a mixture; adding to the mixture water in a quantity adequate for hydration of the cement; mixing the hydrated cement product obtained with epoxy resin; and allowing the cement and resin to harden, to produce the block.
Claim 3
Dependent Claim
21 words
Block according to claim 1, wherein the waste belongs to the group consisting of wet waste, pulverulent waste and technological waste.
Claim 4
Dependent Claim
28 words
Block according to claim 1, wherein the block is further produced by converting the hydrated cement product into granules prior to said step of mixing with epoxy resin.
Claim 5
Dependent Claim
24 words
Block according to claim 4, wherein the block is further produced by drying the granules prior to said step of mixing with epoxy resin.
Claim 6
Dependent Claim
33 words
Block according to claim 1, wherein the block is further produced by subjecting the hydrated cement product to a degassing treatment prior to said step of allowing the cement and resin to harden.
Claim 7
Dependent Claim
31 words
Block according to claim 1, wherein the block is further produced by subjecting the hydrated cement product to vibration prior to said step of allowing the cement and resin to harden.
Claim 8
Dependent Claim
12 words
Block according to claim 1, wherein the waste comprises radioactive incinerator ash.
Claim 9
Dependent Claim
82 words
Process for containing and storing acid incinerator ash waste comprising mixing the waste with cement; adding sufficient water to the mixture of waste and cement for hydration of the cement; mixing the hydrated cement product so obtained with epoxy resin; and allowing the product to harden; wherein the proportion of waste is between 35% and 45% by weight, the proportion of cement is between 25% and 35% by weight, and the proportion of epoxy resin is between 20% and 40% by weight.
Claim 10
Dependent Claim
82 words
Process for containing and storing acid incinerator ash waste comprising mixing the waste with cement; adding sufficient water to the mixture of waste and cement for hydration of the cement; mixing the hydrated cement product so obtained with epoxy resin; and allowing the product to harden; wherein the proportion of waste is between 35% and 45% by weight, the proportion of cement is between 25% and 35% by weight, and the proportion of epoxy resin is between 20% and 40% by weight.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-06-12 | 1992-12-12 | 1993-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-06-12 | 1996-12-12 | 1997-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-06-12 | 2000-12-12 | 2001-06-13 | $7700.00 | Window Closed / Lapsed |