US3850796A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Leakproof connection means between hoop and nozzle of pressure vessel
Assignee: Babcock Atlantique SA
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Filing: 1972-05-10
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Granted: 1974-11-26
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Expires: 1992-05-10
Abstract
Abstract Illustrative embodiments of the invention are directed to the structure within a pressure vessel for a nuclear reactor. Sealing rings are placed against the seats of the pressure vessel discharge nozzles. These rings are field-fastened to the structure through distortionless electron beam welding. These seals are flexible and do not apply uncontrollable stresses to the pressure vessel while establishing a leak-tight condition between the inlet and outlet coolant flow at any anticipated reactor temperature. This invention eliminates the usual core barrel and pressure vessel machining operations and, additionally, insures the necessary leak-tight joints at working temperatures.
Inventors
- 👤 P Thome
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 04:13
CPC Classifications
G; G21; G21C; G21C13/00; G21C13/02; G21C15/00; G21C15/22; Y; Y02; Y02E; Y02E30/00; Y02E30/30
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
135 words
A reactor system for operation at elevated temperature comprising a pressure vessel having inlet and discharge nozzles, a distribution hoop within said pressure vessel having a fluid passage opening in alignment with a respective one of said inlet and discharge nozzles, sleeve means interposed between said hoop opening and said respective nozzle to establish a leakproof cOnnection between said hoop and said nozzle, said sleeve having a groove in the surface thereof to accommodate stresses that are developed between said hoop and said pressure vessel, wherein said hoop further comprises a hollow metal cylinder, two layers of anti-corrosion metal each on respective inner and outer hoop surfaces, a ring of metal within said hoop fluid passage opening, and a bead of anti-corrosion weld metal joining said ring to said anti-corrosion metal layers on said hoop.
Claim 2
Dependent Claim
135 words
A reactor system for operation at elevated temperature comprising a pressure vessel having inlet and discharge nozzles, a distribution hoop within said pressure vessel having a fluid passage opening in alignment with a respective one of said inlet and discharge nozzles, sleeve means interposed between said hoop opening and said respective nozzle to establish a leakproof cOnnection between said hoop and said nozzle, said sleeve having a groove in the surface thereof to accommodate stresses that are developed between said hoop and said pressure vessel, wherein said hoop further comprises a hollow metal cylinder, two layers of anti-corrosion metal each on respective inner and outer hoop surfaces, a ring of metal within said hoop fluid passage opening, and a bead of anti-corrosion weld metal joining said ring to said anti-corrosion metal layers on said hoop.
Claim 3
Dependent Claim
61 words
A system according to claim 1 wherein said sleeve means further comprises a pair of arms, one of said arms being disposed toward said hoop and another of said arms being disposed toward said nozzle, said arms terminating in transversely disposed annular hoop and nozzle contact surfaces, and electron beam welds joining said annular surfaces to said respective hoop and nozzle.
Claim 4
Dependent Claim
24 words
A system according to claim 2 wherein said sleeve further comprises a metal structure that is relatively thinner than said hoop and said nozzle.
Claim 5
Dependent Claim
49 words
A system according to claim 2 wherein one of said arms further comprises another ring, said ring being disposed on the end of said one arm adjacent to and in contact with said nozzle, said ring and said arm forming said groove, said groove being spaced from said nozzle.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-11-25 | 1978-05-27 | 1978-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-25 | 1982-05-27 | 1982-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-25 | 1986-05-27 | 1986-11-26 | $7700.00 | Window Closed / Lapsed |