US3930166A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Package for transporting or enclosing radioactive materials
Assignee: Robatel SLPI SA
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Filing: 1973-12-14
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Granted: 1975-12-30
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Expires: 1993-12-14
Abstract
Abstract Package for transporting or enclosing radioactive materials emitting a large amount of heat, having a heat protection device provided between a container metal casing and an external jacket. The device comprises concentric rows of radial metal vanes between which an endothermic insulating material is placed, so that heat emitted by the radioactive material is discharged under optimum conditions, whilst the endothermic material forms an effective heat barrier against external heat.
Inventors
- 👤 Camille Bochard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:27
CPC Classifications
G; G21; G21F; G21F5/00; G21F5/06; G21F5/10
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
172 words
Packaging for enclosing and transporting radio-active Material of the type including a material container surrounded by an anti-radiation shield located within a protective metal jacket whose inner wall is spaced from the outer wall of the shield to leave an annular space between said walls for housing an improved protective device operative to insulate the container against heat generated externally of the packaging, the improvement comprising: a. first and second metal rings concentrically disposed in said annular space and spaced from each other, the first ring being disposed in heat conductive relationship with said jacket and the second ring being disposed in heat conductive relationship with said shield: b. radially inwardly extending vanes fixed to the first ring and extending toward the second ring without contacting the latter, and radially outwardly extending vanes fixed to the second ring and extending toward the first ring without contacting the latter, the radially inwardly extending vanes alternating with the radially outwardly extending vanes; and c. endothermic insulating material filling the spaces between the adjacent vanes.
Claim 2
Dependent Claim
172 words
Packaging for enclosing and transporting radio-active Material of the type including a material container surrounded by an anti-radiation shield located within a protective metal jacket whose inner wall is spaced from the outer wall of the shield to leave an annular space between said walls for housing an improved protective device operative to insulate the container against heat generated externally of the packaging, the improvement comprising: a. first and second metal rings concentrically disposed in said annular space and spaced from each other, the first ring being disposed in heat conductive relationship with said jacket and the second ring being disposed in heat conductive relationship with said shield: b. radially inwardly extending vanes fixed to the first ring and extending toward the second ring without contacting the latter, and radially outwardly extending vanes fixed to the second ring and extending toward the first ring without contacting the latter, the radially inwardly extending vanes alternating with the radially outwardly extending vanes; and c. endothermic insulating material filling the spaces between the adjacent vanes.
Claim 3
Dependent Claim
40 words
Packaging according to claim 1, wherein one of the rings comprises an annular series of mutually attached U-shaped sections each having two legs joined by a web, and the legs of the adjacent sections being radially disposed to form vanes.
Claim 4
Dependent Claim
39 words
Packaging according to claim 1, wherein one of the rings comprises an annular series of mutually attached angle sections, each having a radially disposed leg forming a vane and an annularly disposed leg forming a part of the ring.
Claim 5
Dependent Claim
49 words
Packaging according to claim 1, wherein the spacing between adjacent vanes is no greater than the radial length of a vane, and wherein insulating material is interposed between the free end of each vane and the opposite ring toward which it extends, whereby to prevent heat conductive contact therebetween.
Claim 6
Dependent Claim
40 words
Packaging according to claim 4, wherein said insulating material comprises a plate having one side lying against a ring and having an opposite side grooved to receive a vane, said plates wedging the alternating vanes together in accurately maintained relationship.
Claim 7
Dependent Claim
35 words
Packaging according to claim 1, wherein said rings are supported within said annular space by heat-conductive sealing material disposed between the first ring and the jacket and between the second ring and the radiation shield.
Claim 8
Dependent Claim
13 words
Packaging according to claim 6, wherein the sealing material includes hydrated calcium sulphate.
Claim 9
Dependent Claim
13 words
Packaging according to claim 6, wherein the sealing material comprises, by volume, substantially:
Claim 10
Dependent Claim
57 words
Packaging according to claim 1, wherein the vanes of the second ring are radially longer than the vanes of the first ring, leaving a zone between the rings wherein the vanes are not alternately opposed, and said zone being filled with neutron absorbing material packed between the vanes of the second ring to form a neutron screen.
Claim 11
Dependent Claim
37 words
Packaging according to claim 9, wherein said neutron absorbing material comprises series of bundles each formed of polyethylene filaments coated with a boron-containing binder, the binder joining the bundles to one-another and sealing them between the vanes.
Claim 12
Dependent Claim
17 words
Packaging according to claim 10, wherein said neutron absorbing material has substantially the following composition by weight:
Claim 13
Dependent Claim
101 words
Packaging according to claim 1, wherein the first ring comprises an annular series of attached U-shaped sections, each having two legs joined by a web and the legs of adjacent sections being radially inwardly disposed to form vanes; and wherein the second ring comprises an annular series of attached angle sections, each haVing a radially disposed leg forming a vane and an annular disposed leg forming a part of the second ring; and the free ends of the vanes being spaced from the opposed ring by insulating material, whereby to prevent heat conductive contact between the vanes and the opposing rings.
Claim 14
Dependent Claim
28 words
Packaging according to claim 12, wherein said insulating material comprises plates wedged between the vanes and the opposing rings and grooved to receive the ends of the vanes.
Claim 15
Dependent Claim
36 words
Packaging according to claim 12, wherein the rings are supported within said annular space by heat conductive sealing material disposed between the first ring and the jacket and between the second ring and the radiation shield.
Claim 16
Dependent Claim
13 words
Packaging according to claim 14, wherein the sealing material includes hydrated calcium sulphate.
Claim 17
Dependent Claim
57 words
Packaging according to claim 12, wherein the vanes of the second ring are radially longer than the vanes of the first ring, leaving a zone between the rings wherein the vanes are not alternately opposed, and said zone being filled with neutron absorbing material packed between the vanes of the second ring to form a neutron screen.
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) | 1978-12-29 | 1979-06-30 | 1979-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-29 | 1983-06-30 | 1983-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-29 | 1987-06-30 | 1987-12-30 | $7700.00 | Window Closed / Lapsed |