US4342722A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control rod for a nuclear reactor
Assignee: URANIUM PECHINEY UGINE KUHLMANN A CORP OF FRANCE
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Filing: 1980-10-24
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Granted: 1982-08-03
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Expires: 2000-10-24
Abstract
Abstract A control rod having a center of thermal neutron absorbing material is provided specifically for use within the core of a nuclear reactor, extending through the central zone of maximum flux density. The center is formed of a plurality of portions, normally three, arranged end to end and defining joins therebetween. A central one of said portions extends continuously through the zone of maximum flux density with the joins located outward of this zone.
Inventors
- 👤 Jacques Blum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:53
CPC Classifications
G; G21; G21C; G21C7/00; G21C7/06; G21C7/08; G21C7/10; G21C7/005; Y; Y02; Y02E; Y02E30/00; Y02E30/30
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
134 words
In the core of a nuclear reactor having a central zone of maximum flux density and a control rod the improvement comprising said control rod having a length equal to said reactor core and being fixedly positioned within the reactor core such that the center of said control rod is central of and extends through said zone of maximum flux density, said control rod comprising a core having a plurality of at least three elongated sections made of boron glass positioned end to end to define non-overlapping joins therebetween, and at least one of said elongated sections is more than one-half the length of said control rod and is located centrally of said zone of maximum flux density of said core, and said joins being located outward of said zone of maximum flux density.
Claim 2
Dependent Claim
134 words
In the core of a nuclear reactor having a central zone of maximum flux density and a control rod the improvement comprising said control rod having a length equal to said reactor core and being fixedly positioned within the reactor core such that the center of said control rod is central of and extends through said zone of maximum flux density, said control rod comprising a core having a plurality of at least three elongated sections made of boron glass positioned end to end to define non-overlapping joins therebetween, and at least one of said elongated sections is more than one-half the length of said control rod and is located centrally of said zone of maximum flux density of said core, and said joins being located outward of said zone of maximum flux density.
Claim 3
Dependent Claim
22 words
The control rod of claim 1 wherein at least one of said sections extends continuously through the zone of maximum flux density.
References Cited (Backward Citations)
US3255086A
Cited
US3175955A
Cited
US3267002A
Cited
US3264192A
Cited
US3510398A
Cited
FR2041723A1
Cited
US3773617A
Cited
JPS5217189A
Cited
US4169760A
Cited
JPS5267491A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-08-02 | 1986-02-01 | 1986-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-08-02 | 1990-02-01 | 1990-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-08-02 | 1994-02-01 | 1994-08-03 | $7700.00 | Window Closed / Lapsed |