US3781191A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nuclear control rod having embedded filaments
Assignee: UNC NUCLEAR INDUSTRIES Inc A CORP OF
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Filing: 1972-02-22
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Granted: 1973-12-25
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Expires: 1992-02-22
Abstract
Abstract A nuclear reactor control rod for regulating or shutting-down the power of a nuclear reactor is described. The control rod features filaments of a neutron absorber bonded together and to a foil backing to form a sheet. Plural sheets are laminated to form a plate, and plural plates may be joined together in a cruciform shape. A preferred method to make such a control comprises forming the sheets by plasma-spraying a corrosion-resistant metal to bond the filaments to the foil backing.
Inventors
- 👤 C Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:57
CPC Classifications
G; G21; G21C; G21C7/00; G21C7/06; G21C7/08; G21C7/10; G21C7/113; Y; Y02; Y02E; Y02E30/00; Y02E30/30
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
19 words
The invention as claimed in claim 1 wherein the high absorption material is one of boron, hafnium and cadmium.
Claim 2
Dependent Claim
22 words
A control rod element as claimed in claim 2 wherein the filaments are each spaced from the foil sheets by bonding metal.
Claim 3
Dependent Claim
14 words
A control rod element as claimed in claim 3 wherein the coolant is water.
Claim 4
Dependent Claim
27 words
A control rod element as claimed in claim 4 wherein the element comprises plural said lamina bonded together by said bonding metal to form a plate-like member.
Claim 5
Dependent Claim
18 words
A control element as claimed in claim 5 wherein the said bonded metal is less than 100% dense.
Claim 6
Dependent Claim
25 words
A control element as claimed in claim 6 wherein the element has a cruciform shape made up of plural of said plate-like mEmbers joined together.
Claim 7
Dependent Claim
20 words
The invention as claimed in claim 4 wherein the filaments are of boron with a diameter of about 0.005 inches.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-24 | 1977-06-25 | 1977-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-24 | 1981-06-25 | 1981-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-24 | 1985-06-25 | 1985-12-25 | $7700.00 | Window Closed / Lapsed |