US4021676A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Waste canister for storage of nuclear wastes
Assignee: Energy Research and Development Administration ERDA
•
Filing: 1976-05-07
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Granted: 1977-05-03
•
Expires: 1996-05-07
Abstract
Abstract A waste canister for storage of nuclear wastes in the form of a solidified glass includes fins supported from the center with the tips of the fins spaced away from the wall to conduct heat away from the center without producing unacceptable hot spots in the canister wall.
Inventors
- 👤 James B. Duffy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 05:00
CPC Classifications
G; G21; G21F; G21F5/00; G21F5/005; Y; Y10; Y10S; Y10S422/00; Y10S422/903
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
125 words
A storage canister containing radioactive nuclear wastes in the form of a glass, radioactive isotopes being present therein in concentration sufficient to produce a large amount of heat, said canister comprising a canister body consisting of a side wall and top and bottom end caps, and a fin assembly disposed in the canister body, the fins extending from the center of the canister to a point spaced from the canister wall a distance effective to keep the temperature of the glass at the center of the canister at an acceptable level without producing unacceptable hot spots in the canister wall, the space between the end of the fin and the wall being filled with glass to provide thermal insulation between the fin and the wall.
Claim 2
Dependent Claim
125 words
A storage canister containing radioactive nuclear wastes in the form of a glass, radioactive isotopes being present therein in concentration sufficient to produce a large amount of heat, said canister comprising a canister body consisting of a side wall and top and bottom end caps, and a fin assembly disposed in the canister body, the fins extending from the center of the canister to a point spaced from the canister wall a distance effective to keep the temperature of the glass at the center of the canister at an acceptable level without producing unacceptable hot spots in the canister wall, the space between the end of the fin and the wall being filled with glass to provide thermal insulation between the fin and the wall.
Claim 3
Dependent Claim
49 words
A storage canister according to claim 1 wherein the fin assembly includes a pipe disposed on the axial center line of the canister body having eight fins radiating therefrom at 45° intervals and extending from a point near the top of the canister to the bottom of the canister.
Claim 4
Dependent Claim
66 words
A storage canister according to claim 2 and including a conical, ceramic standoff attached to the center of the lower end cap of the canister and over which the end of the central pipe fits and spacer rods tack welded to the outer edge of the fins near the top thereof to space the fins the desired distance away from the side wall of the canister.
Claim 5
Dependent Claim
52 words
A storage canister according to claim 3 wherein the canister body, central pipe and fins are formed of stainless steel, the canister is 12 inches in diameter, the canister body is 1/16-inch thick, and the fins are 1/4 -inch thick and terminate 1/2 inch away from the side walls of the canister.
References Cited (Backward Citations)
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Cited
US3092565A
Cited
US3365578A
Cited
US3282335A
Cited
US3369972A
Cited
US3610334A
Cited
US3727060A
Cited
US3780309A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-05-02 | 1980-11-01 | 1981-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-02 | 1984-11-01 | 1985-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-02 | 1988-11-01 | 1989-05-03 | $7700.00 | Window Closed / Lapsed |