EP0044381A1
Expired / Lapsed
EP
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Method for treating radioactive material and container for enclosing such material
Assignee: ABB Norden Holding AB
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Filing: 1981-05-11
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Granted: —
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Expires: 2001-05-11
Abstract
Abstract A container (1) for enclosing particulate or piece-formed radioactive material (6) which shall be converted into a solid body by isostatic pressing at a high temperature and a high pressure. The container may have a corrugated sheath (2) and suitably a plane lid (4) and a plane bottom (3). The corrugation makes possible axial compression of the container (1) prior to the pressing. Instead of the corrugated sheath (2) the container may have a cylindrical sheath (side wall) and bellows projecting into the sheath and joining the sheath of the container to a lid and a bottom. The bellows make it possible to insert the lid and the bottom by gas pressure, so that the material (6) present in the container is axially compressed.
Inventors
- 👤 Hans Larker
- 👤 Ragnar Tegman
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 12:11
CPC Classifications
G; G21; G21F; G21F9/00; G21F9/28; G21F9/34; G21F9/36
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
69 words
Method for treating radioactive particulate or piece-formed material (6) by enclosing the material in a gas-tight container (1) and compressing the material (6) into a solid body at a necessary temperature and a necessary pressure, characterised in that the material (6) is enclosed in a container (1) with a corrugated sheath (2) and that the material (6) is converted into a solid body by compression at a high temperature.
Claim 2
Dependent Claim
69 words
Method for treating radioactive particulate or piece-formed material (6) by enclosing the material in a gas-tight container (1) and compressing the material (6) into a solid body at a necessary temperature and a necessary pressure, characterised in that the material (6) is enclosed in a container (1) with a corrugated sheath (2) and that the material (6) is converted into a solid body by compression at a high temperature.
Claim 3
Dependent Claim
94 words
Method for treating radioactive particulate or piece-formed material (6) by enclosing the material in a gas-tight container (11) and compressing the material (6) into a solid body at a necessary temperature and a necessary pressure, characterised in that the material (6) is enclosed in a container (11) with a cylindrical sheath (12) with a lid (15) and/or a bottom (13) which are joined to the sheath (12) by bellows (14, 16), and that the container after filling of the material (6) is converted into a solid body by a compression at a high temperature.
Claim 4
Dependent Claim
94 words
Method for treating radioactive particulate or piece-formed material (6) by enclosing the material in a gas-tight container (11) and compressing the material (6) into a solid body at a necessary temperature and a necessary pressure, characterised in that the material (6) is enclosed in a container (11) with a cylindrical sheath (12) with a lid (15) and/or a bottom (13) which are joined to the sheath (12) by bellows (14, 16), and that the container after filling of the material (6) is converted into a solid body by a compression at a high temperature.
Claim 5
Dependent Claim
22 words
Method according to claim 1 or 2, characterised in that the conversion into a solid body takes place by isostatic pressing (HIP).
Claim 6
Dependent Claim
33 words
Method according to any of claim 1 to 3, characterised in that the containers (1, 11) after filling of the material (6) is compressed axially at room temperature prior to the final compression.
Claim 7
Dependent Claim
35 words
Method according to claim 4, characterised in that the compression is carried out so that the material (6) in the containers (1, 11) is densified to 40 % or more of the theoretically possible density.
Claim 8
Dependent Claim
16 words
Method according to claim 4 or 5, characterised in that the compression is carried out mechanically.
Claim 9
Dependent Claim
30 words
Method according to claim 4 or 5, characterised in that the compression is carried out isostatically in a pressure chamber under the influence of a gaseous or liquid pressure medium.
Claim 10
Dependent Claim
54 words
Container (1, 11, 19) for enclosing particulate or piece-formed material (6, 35), especially radioactive material, which shall be converted into a solid body by isostatic pressing at a high temperature, characterised in that the walls of said container are provided with at least one corrugated wall portion (2, 14, 16, 31, 32, 33, 34).
Claim 11
Dependent Claim
54 words
Container (1, 11, 19) for enclosing particulate or piece-formed material (6, 35), especially radioactive material, which shall be converted into a solid body by isostatic pressing at a high temperature, characterised in that the walls of said container are provided with at least one corrugated wall portion (2, 14, 16, 31, 32, 33, 34).
Claim 12
Dependent Claim
18 words
Container according to claim 8, characterised in that the said container (1) has a bellows-like side wall (2).
Claim 13
Dependent Claim
41 words
Container according to claim 8, characterised in that said container (11) has a cylindrical sheath (12) with a lid (15) and/or a bottom (13) which are joined to the sheath (12) by bellows (14, 16) projecting into said cylindrical sheath (12).
Claim 14
Dependent Claim
29 words
Container according to claim 8, characterised in that said container (11) has a cylindrical sheath with a bottom and/or lid portion provided with annular corrugations (31, 32, 33, 34).
Claim 15
Dependent Claim
35 words
Container according to any of claim 8 to 11, characterised in that the container (1, 11, 19) is built up from at least two capsules (2a, 2b, 12a, 12b, 20, 21), one within the other.
References Cited (Backward Citations)
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