Patent US4235739A successfully refreshed from Google Patents.
US4235739A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Canister method of disposing of radioactive waste
Assignee: Steag Kernenergie GmbH
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Filing: 1978-05-05
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Granted: 1980-11-25
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Expires: 1998-05-05
Abstract
Abstract A substantially cylindrical canister is oriented in an upright position with its fill hole directed upwardly, and hydraulic cement is loaded into the top of this canister. The canister is then tipped on its side and connected via a swivel coupling to a suction line and to a line through which a radioactive-waste slurry may be fed. The interior of the canister is then evacuated and the canister is rotated about a horizontal axis passing through this swivel coupling. Radioactive waste is then sucked into the canister by the subatomospheric pressure therein and is intimately mixed with cement already inside the canister by inwardly projecting mixing vanes provided inside the canister.
Inventors
- 👤 Henning Baatz
- 👤 Dieter Rittscher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:12
CPC Classifications
G; G21; G21F; G21F5/00; G21F5/002; G21F5/06; G21F5/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
137 words
A method of packaging radioactive waste, said method comprising the steps of: supporting a canister having a substantially central fill hole lying on a canister axis with said hole directed upwardly and said axis upright; introducing dry cement granules into said canister; thereafter tipping said canister about a horizontal axis into a tipped position with said canister axis horizontal and said fill hole directed horizontally; aspirating gas from the interior of said canister through said fill hole to create a subatmospheric pressure in said interior; rotating said canister about said canister axis while maintaining said canister in said tipped position; and thereafter sucking fluent radioactive waste into said canister through said fill hole with said subatmospheric pressure while rotating said canister about said canister axis in said tipped position and thereby mixing said waste with said cement.
Claim 2
Independent Claim
137 words
A method of packaging radioactive waste, said method comprising the steps of: supporting a canister having a substantially central fill hole lying on a canister axis with said hole directed upwardly and said axis upright; introducing dry cement granules into said canister; thereafter tipping said canister about a horizontal axis into a tipped position with said canister axis horizontal and said fill hole directed horizontally; aspirating gas from the interior of said canister through said fill hole to create a subatmospheric pressure in said interior; rotating said canister about said canister axis while maintaining said canister in said tipped position; and thereafter sucking fluent radioactive waste into said canister through said fill hole with said subatmospheric pressure while rotating said canister about said canister axis in said tipped position and thereby mixing said waste with said cement.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-11-25 | 1984-05-26 | 1984-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-11-25 | 1988-05-26 | 1988-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-11-25 | 1992-05-26 | 1992-11-25 | $7700.00 | Window Closed / Lapsed |