Patent US4172807A successfully refreshed from Google Patents.
US4172807A
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Method for anchoring radioactive substances in a body resistant to leaching by water
Assignee: ABB Norden Holding AB
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Filing: 1977-10-31
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Granted: 1979-10-30
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Expires: 1997-10-31
Abstract
Abstract Disclosed is a method for containing high-level radioactive waste in a body resistant to leaching by water. The method includes the steps of providing a mass containing radioactive substances and either a material which is resistant to leaching by water or a material which when heated forms a material resistant to leaching by water, enclosing the mass in a capsule, and then isostatically pressing the capsule at a temperature and pressure sufficient to form a coherent, dense body from the mass.
Inventors
- 👤 Hans Larker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:47
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/622; C04B35/64; C04B35/645; C04B35/6455; G; G21; G21F; G21F9/00; G21F9/28; G21F9/30
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
79 words
A method for anchoring radioactive waste from nuclear fuel in a body resistant to leaching by water comprising providing a mass containing radioactive substances and either a material which is resistant to leaching by water or a material which, when heated, forms a material resistant to leaching by water, enclosing the mass in a gas and liquid impervious capsule and isostatically pressing at a pressure and temperature sufficient for the formation of a coherent, dense body of the mass.
Claim 2
Independent Claim
79 words
A method for anchoring radioactive waste from nuclear fuel in a body resistant to leaching by water comprising providing a mass containing radioactive substances and either a material which is resistant to leaching by water or a material which, when heated, forms a material resistant to leaching by water, enclosing the mass in a gas and liquid impervious capsule and isostatically pressing at a pressure and temperature sufficient for the formation of a coherent, dense body of the mass.
Claim 3
Dependent Claim
28 words
A method according to claim 1, wherein particles of a radioactive material are mixed with particles of a material resistant to leaching by water to form the mass.
Claim 4
Dependent Claim
21 words
A method according to claim 2, wherein the material resistant to leaching consists of a material containing one or more oxides.
Claim 5
Dependent Claim
16 words
A method according to claim 3, wherein the material resistant to leaching consists of aluminum oxide.
Claim 6
Dependent Claim
15 words
A method according to claim 2, wherein the material resistant to leaching consists of quartz.
Claim 7
Dependent Claim
16 words
A method according to claim 3, wherein the material resistant to leaching consists of titanium dioxide.
Claim 8
Dependent Claim
22 words
A method according to claim 2, wherein the material resistant to leaching consists of rock existing in nature, such as a silicate.
Claim 9
Dependent Claim
19 words
A method according to claim 1, wherein the mass includes a material in which the radioactive substances are fixed.
Claim 10
Dependent Claim
21 words
A method according to claim 8, wherein the mass contains compounds of radioactive substances which are resistant to leaching by water.
Claim 11
Dependent Claim
26 words
A method according to claim 8, wherein the mass contains a material obtained by heating an ion exchange material in which the radioactive substances are fixed.
Claim 12
Dependent Claim
15 words
A method according to claim 10, wherein the ion exchange material consists of a zeolite.
Claim 13
Dependent Claim
15 words
A method according to claim 10, wherein the ion exchange material consists of a titanate.
Claim 14
Dependent Claim
27 words
A method according to claim 8, wherein the mass contains material resistant to leaching by water in addition to material in which the radioactive substances are fixed.
Claim 15
Dependent Claim
24 words
A method according to claim 13, wherein the additional material resistant to leaching by water consists of a material containing one or more oxides.
Claim 16
Dependent Claim
13 words
A method according to claim 1 wherein the capsule consists of metallic material.
Claim 17
Dependent Claim
13 words
A method according to claim 1 wherein the capsule consists of quartz glass.
Claim 18
Dependent Claim
14 words
A method according to claim 1 wherein the capsule consists of boron silicate glass.
Claim 19
Dependent Claim
18 words
A method according to claim 1 wherein the pressure during the isostatic pressing is at least 10 MPa.
Claim 20
Dependent Claim
18 words
A method according to claim 1 wherein the temperature during the isostatic pressing is at least 700° C.
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) | 1982-10-29 | 1983-04-30 | 1983-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-10-29 | 1987-04-30 | 1987-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-10-29 | 1991-04-30 | 1991-10-30 | $7700.00 | Window Closed / Lapsed |