Patent US4600610A successfully refreshed from Google Patents.
US4600610A
Expired / Lapsed
US
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Molded body for embedding radioactive waste and process for its production
Assignee: Nukem GmbH
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Filing: 1982-11-09
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Granted: 1986-07-15
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Expires: 2002-11-09
Abstract
Abstract There are known molded bodies for the safe, long time fixation of radioactive and toxic wastes which have a matrix of graphite and inorganic binding agent, preferably nickel sulfide. An increased resistance to leaching is obtained with molded bodies that have a waste containing nucleus and a waste free shell made of the same graphite matrix.
Inventors
- 👤 Milan Hrovat
- 👤 Hans Huschka
- 👤 Lothar Rachor
- 👤 Thomas Schmidt-Hansberg
- 👤 Reinhard Kroebel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:54
CPC Classifications
G; G21; G21F; G21F9/00; G21F9/28; G21F9/30; G21F9/301; G21F9/302; G21F9/34; Y; Y10; Y10T; Y10T428/00; Y10T428/23; Y10T428/239
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
93 words
A molded body comprising graphite and an inorganic binder for the safe, long time fixation of radioactive or toxic waste consisting essentially of (1) a nucleus containing the waste bound in a matrix of graphite and inorganic binder and (2) a surrounding shell of the same matrix free of waste, the shell having been pressed on the matrix at a pressure of 10 to 100 MN/m 2 , the molded body having a density above 90% of the theoretical value and very tight and free from pores which go through the molded body.
Claim 2
Dependent Claim
93 words
A molded body comprising graphite and an inorganic binder for the safe, long time fixation of radioactive or toxic waste consisting essentially of (1) a nucleus containing the waste bound in a matrix of graphite and inorganic binder and (2) a surrounding shell of the same matrix free of waste, the shell having been pressed on the matrix at a pressure of 10 to 100 MN/m 2 , the molded body having a density above 90% of the theoretical value and very tight and free from pores which go through the molded body.
Claim 3
Dependent Claim
13 words
A molded body according to claim 1 wherein the waste is radioactive waste.
Claim 4
Dependent Claim
16 words
A molded body according to claim 1 wherein the inorganic binder is a stable metal sulfide.
Claim 5
Dependent Claim
13 words
A molded body according to claim 3 wherein the binder is nickel sulfide.
Claim 6
Dependent Claim
17 words
A molded body according to claim 4 wherein the nucleus contains 1 to 70 volume % waste.
Claim 7
Dependent Claim
17 words
A molded body according to claim 3 wherein the nucleus contains 1 to 70 volume % waste.
Claim 8
Dependent Claim
17 words
A molded body according to claim 1 wherein the nucleus contains 1 to 70 volume % waste.
Claim 9
Dependent Claim
17 words
A molded body according to claim 7 wherein the nucleus contains 10 to 50 volume % waste.
Claim 10
Dependent Claim
22 words
A molded body according to claim 7 wherein the shell is composed of a plurality of individual parts which are joined together.
Claim 11
Dependent Claim
22 words
A molded body according to claim 5 wherein the shell is composed of a plurality of individual parts which are joined together.
Claim 12
Dependent Claim
22 words
A molded body according to claim 1 wherein the shell is composed of a plurality of individual parts which are joined together.
Claim 13
Dependent Claim
16 words
A molded body according to claim 11 wherein the shell is surrounded by a steel jacket.
Claim 14
Dependent Claim
16 words
A molded body according to claim 10 wherein the shell is surrounded by a steel jacket.
Claim 15
Dependent Claim
16 words
A molded body according to claim 11 wherein the shell is surrounded by a steel jacket.
Claim 16
Dependent Claim
16 words
A molded body according to claim 7 wherein the shell is surrounded by a steel jacket.
Claim 17
Dependent Claim
16 words
A molded body according to claim 6 wherein the shell is surrounded by a steel jacket.
Claim 18
Dependent Claim
16 words
A molded body according to claim 5 wherein the shell is surrounded by a steel jacket.
Claim 19
Dependent Claim
16 words
A molded body according to claim 1 wherein the shell is surrounded by a steel jacket.
Claim 20
Dependent Claim
26 words
A molded body according to claim 3 wherein the shell has been pressed on the matrix at a pressure of 30 to 100 MN/m 2 .
Claim 21
Dependent Claim
23 words
A molded body according to claim 1 wherein the pressing pressure is 10 to 50 MN/m 2 and the inorganic binder is sulfur.
Claim 22
Dependent Claim
17 words
A molded body according to claim 1 having a density which is 99% of the theoretical density.
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) | 1989-07-14 | 1990-01-13 | 1990-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-07-14 | 1994-01-13 | 1994-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-07-14 | 1998-01-13 | 1998-07-15 | $7700.00 | Window Closed / Lapsed |