US3727060A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Package for the storage and transportation of radioactive substances containing both neutron and gamma radiation absorbing material
Assignee: TRANSNUCLEAIRE SOC TRANSPORTS
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Filing: 1970-08-13
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Granted: 1973-04-10
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Expires: 1990-08-13
Abstract
Abstract The package has a composite wall comprising from inside to outside, a inner shell surrounding the useful cavity, a layer of dense material for protection against gamma radiations and an outer shell. A layer of neutron-absorbing material is arranged against the other surface of the outer shell, heat conducting elements, such as fins or pins, being fixed against the outer shell and projecting at the surface of the layer.
Inventors
- 👤 P Blum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:47
CPC Classifications
F; F16; F16L; F16L3/00; F16L3/08; F16L3/12; F16L3/13; G; G21; G21F; G21F5/00; G21F5/06; G21F5/10
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
45 words
Package according to claim 1, wherein said layer of neutron-absorbing material is arranged against the outer surface of the outer shell, said heat-conducting elements being of the type of fins or pins, fIxed against said outer shell, and projecting at the surface of said layer.
Claim 2
Dependent Claim
33 words
Package according to claim 1, wherein said layer of neutron absorbing material is situated inside the outer shell and said heat-conductive elements, of which at least one end is free, are buried therein.
Claim 3
Dependent Claim
14 words
Package according to claim 2, wherein the heat-conducting elements have a general radial direction.
Claim 4
Dependent Claim
19 words
Package according to claim 2, wherein the heat-conducting elements have a general direction inclined with respect to the radius.
Claim 5
Dependent Claim
76 words
Package according to claim 2, wherein the heat-conducting elements are constituted by metallic blades fixed by welding on the outer shell of the package, parallel to the axis of the latter, said blades including on their free edge a succession of teeth folded by their sides at their blade support and having undergone twisting so that their flat portions are situated in successive planes substantially parallel between themselves and perpendicular to the axis of the package.
Claim 6
Dependent Claim
45 words
Package according to claim 3, wherein the heat-conducting elements are metallic and have a section especially in a ''''U'''' or in an ''''I,'''' said elements being arranged so that the horizontal bar of the ''''U'''' or the vertical limb of the ''''I'''' are oriented radially.
Claim 7
Dependent Claim
56 words
Package according to claim 3, wherein the heat-conducting elements are fixed by their ends against the corresponding constituent element of the wall of the package, the other end being curved with respect to the general direction of the element so as to be substantially parallel to the corresponding constitutent element, of the wall of the package.
Claim 8
Dependent Claim
15 words
Package according to claim 1, wherein the neutron absorbing hydrogeneous material is rich in boron.
Claim 9
Dependent Claim
39 words
Package according to claim 1, comprising a plurality of said cavities bounded by inner shells and distributed around its axis, the spaces comprised between the various inner shells being at least partially filled by a metal lighter than lead.
Claim 10
Dependent Claim
33 words
Package according to claim 2, including a layer of material of the type of mortar or cement with a hydraulic binder base arranged between said outer shell and said layer of dense material.
Claim 11
Dependent Claim
14 words
Package according to claim 11, wherein the hydraulic binder is of the aluminous type.
Claim 12
Dependent Claim
74 words
Package according to claim 1, comprising a removable protective jacket, of which the two edges are fixed to continous rims which occur at the two ends of the package, the assembly being such that clean water can be circulated in the space arranged between said jacket and the wall of the package, whereby, on operations of immersion in a pool, contamination of the portion of the package comprising the cooling elements, can be avoided.
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) | 1976-04-09 | 1976-10-09 | 1977-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-09 | 1980-10-09 | 1981-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-09 | 1984-10-09 | 1985-04-10 | $7700.00 | Window Closed / Lapsed |