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US4508969A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for holding, transporting and final storing of burned-out reactor fuel elements
Assignee: Nukem GmbH
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Filing: 1981-06-25
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Granted: 1985-04-02
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Expires: 2001-06-25
Abstract
Abstract The invention relates to a device for holding, transporting and final storing burned-out reactor fuel elements comprising a hollow-cylindrical container that can be closed with a cover. On its sealing surface which is opposite the cover, the container is provided with projections which are of dovetail profile. The cover is cast onto the container around the dovetail projections by means of a casting mold whereby an intimate and firm connection between the container jacket and the cover can be produced. The cover can also be prefabricated with filler channels for directing metal casting material into recesses provided in the sealing surface of the cover. When the metal hardens in the recesses the cover is securely locked to the container. The container may have a shielding cover beneath the top cover.
Inventors
- 👤 Klaus Janberg
- 👤 Hans-Peter Dyck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:42
CPC Classifications
G; G21; G21F; G21F5/00; G21F5/06; G21F5/12
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
85 words
A device which can be converted into a container for holding, transporting and finally storing burned-out reactor fuel elements comprising an open-ended cylindrical container having a sealing surface around said open end, a cover for said open end having a sealing surface for mating with said container sealing surface, an undercut recess in the sealing surface of said open end, and channels running through said cover communicating with said undercut recess at one end and with the space outside the cover at the other end.
Claim 2
Independent Claim
85 words
A device which can be converted into a container for holding, transporting and finally storing burned-out reactor fuel elements comprising an open-ended cylindrical container having a sealing surface around said open end, a cover for said open end having a sealing surface for mating with said container sealing surface, an undercut recess in the sealing surface of said open end, and channels running through said cover communicating with said undercut recess at one end and with the space outside the cover at the other end.
Claim 3
Independent Claim
85 words
A device for holding, transporting and finally storing burned out reactor fuel elements comprising an open-ended cylindrical container having a sealing surface around said open end, a cover for said open end having a sealing surface for mating with said container sealing surface, characterized in that one sealing surface has an annular undercut recess, said recess being enlarged below said surface, the other sealing surface has an integral annular projection of a shape complementary to said undercut recess, said projection being disposed in said recess.
Claim 4
Independent Claim
85 words
A device for holding, transporting and finally storing burned out reactor fuel elements comprising an open-ended cylindrical container having a sealing surface around said open end, a cover for said open end having a sealing surface for mating with said container sealing surface, characterized in that one sealing surface has an annular undercut recess, said recess being enlarged below said surface, the other sealing surface has an integral annular projection of a shape complementary to said undercut recess, said projection being disposed in said recess.
Claim 5
Dependent Claim
32 words
The device of claim 2 in which said projection comprises a rib of dovetailed cross-section on said container sealing surface and said cover sealing surface comprises cast metal enclosing said dovetailed rib.
Claim 6
Dependent Claim
34 words
The device of claim 2 in which said recess is in said container sealing surface, said cover has channels communicating with said recess, and said channels and said recess are filled with cast metal.
Claim 7
Dependent Claim
21 words
The device of claim 2 in which said cover has a depending central boss extending into the interior of said container.
Claim 8
Dependent Claim
27 words
The device of claim 2 which includes a shielding cover secured to the container and a cover plate overlying said shielding cover and underlying said container cover.
Claim 9
Dependent Claim
19 words
The device of claim 2 which includes an inner container for holding the fuel elements disposed within said container.
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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) | 1988-04-01 | 1988-10-01 | 1989-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-04-01 | 1992-10-01 | 1993-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-04-01 | 1996-10-01 | 1997-04-02 | $7700.00 | Window Closed / Lapsed |