US4250832A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for storing radioactive materials
Assignee: Toshiba Corp
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Filing: 1978-11-28
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Granted: 1981-02-17
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Expires: 1998-11-28
Abstract
Abstract A method and apparatus for storing radioactive materials, in which a metal halide or a metal carbonyl compound is introduced from a cylinder to the vicinity of a solid material while a gaseous radioactive material provided from a reservoir, ionized and accelerated is being implanted into the solid material, so as to allow the elemental metal to be deposited on the surface of the solid material, thereby detaining the radioactive material in the solid material and newly providing the surface of the solid material with a metal layer for multi-layer implantation.
Inventors
- 👤 Satoru Ozaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:19
CPC Classifications
G; G21; G21F; G21F9/00; G21F9/02
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
183 words
An apparatus for storing radioactive materials in a solid material, comprising: an ion source for ionizing gaseous radioactive material to be stored; an accelerator for accelerating the ionized radioactive material, the accelerator consisting of an electrode group; an implantation chamber for housing the solid material into which the accelerated ions of the radioactive material are to be implanted; evacuation means connected to the implantation chamber; means for introducing at least one metal compound selected from metal halides and metal carbonyls to the vicinity of the solid material; means for controlling the temperature of the solid material to fall within the range suitable for decomposing the metal compound to deposit the elemental metal on the surface of the solid material and for permitting implantation of the radioactive material into the solid material simultaneously with formation of a new metal layer on the surface of the solid material; and means forming apertures provided between the ion source and the accelerator and between the accelerator and the implantation chamber so as to create a pressure difference between the ion source, the accelerator and the implantation chamber.
Claim 2
Independent Claim
183 words
An apparatus for storing radioactive materials in a solid material, comprising: an ion source for ionizing gaseous radioactive material to be stored; an accelerator for accelerating the ionized radioactive material, the accelerator consisting of an electrode group; an implantation chamber for housing the solid material into which the accelerated ions of the radioactive material are to be implanted; evacuation means connected to the implantation chamber; means for introducing at least one metal compound selected from metal halides and metal carbonyls to the vicinity of the solid material; means for controlling the temperature of the solid material to fall within the range suitable for decomposing the metal compound to deposit the elemental metal on the surface of the solid material and for permitting implantation of the radioactive material into the solid material simultaneously with formation of a new metal layer on the surface of the solid material; and means forming apertures provided between the ion source and the accelerator and between the accelerator and the implantation chamber so as to create a pressure difference between the ion source, the accelerator and the implantation chamber.
Claim 3
Dependent Claim
25 words
An apparatus as set forth in claim 1, which further comprises means for moving the solid material at a predetermined speed, thereby performing continuous operation.
Claim 4
Dependent Claim
39 words
An apparatus as set forth in claim 1, said means for introducing at least one metal compound further comprising means for introducing the at least one metal compound at a partial pressure of 10 -1 to 10 -4 torr.
Claim 5
Dependent Claim
20 words
An apparatus as set forth in claim 1, wherein said metal carbonyls comprise nickel carbonyl, iron carbonyl or chromium carbonyl.
Claim 6
Dependent Claim
34 words
An apparatus as set forth in claim 1, wherein said metal halides comprise chlorides, bromides and iodides of silicon, germanium, titanium, zirconium, hafnium, vanadium, chromium, tantalum, iron, cobalt, copper, beryllium, niobrium, molybdenum and tungsten.
Claim 7
Dependent Claim
30 words
The apparatus according to claim 1, wherein the temperature control means controls the temperature of the solid material to fall within the range of from 300° C. to 800° C.
Claim 8
Dependent Claim
21 words
The apparatus according to claim 1, or 6, which further comprises means for introducing a carrier gas for the metal compound.
Claim 9
Dependent Claim
21 words
The apparatus according to claim 1 or 6, which further comprises means for introducing hydrogen gas together with the metal halide.
References Cited (Backward Citations)
US2820722A
Cited
US3326178A
Cited
US3380853A
Cited
US3704216A
Cited
US3908183A
Cited
US4051063A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-02-17 | 1984-08-18 | 1985-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-02-17 | 1988-08-18 | 1989-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-02-17 | 1992-08-18 | 1993-02-17 | $7700.00 | Window Closed / Lapsed |