US3603383A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Steam generator, particularly for pressurized water nuclear reactors
Assignee: Siemens AG
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Filing: 1968-03-25
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Granted: 1971-09-07
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Expires: 1988-03-25
Abstract
Abstract Steam generator particularly for pressurized water reactors includes an elongated pressure vessel, a bundle of heat exchanger tubes located in the vessel and extending substantially parallel to one another in the longitudinal direction of the vessel, and a pair of spaced-apart tube support plates mounted in the vessel and formed with recesses wherein respective ends of the tubes extend. The tubes are spaced from one another a distance that is only a fraction of the diameter thereof, and have a reduced diameter over a length thereof of several decimeters adjacent the tube support plates.
Inventors
- 👤 Horst Michael
- 👤 Hans-Peter Schabert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:11
CPC Classifications
F; F28; F28F; F28F9/00; F28F9/02; F28F9/0236; F28F9/0239; F22; F22B; F22B1/00; F22B1/02; F22B1/023; F22B1/026; F28F9/007; F28F9/013; F28F9/0137
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
96 words
Steam generator particularly for pressurized-water reactors comprising an elongated pressure vessel, a bundle of heat exchanger tubes located in the vessel and extending substantially parallel to one another in the longitudinal direction of the vessel, and a pair of spaced-apart tube support plates mounted in the vessel and formed with recesses wherein respective ends of said tubes extend, said tubes being spaced from one another a distance that is only a fraction of the diameter thereof, and having a reduced diameter over a length thereof in the order of several decimeters adjacent said tube support plates.
Claim 2
Dependent Claim
96 words
Steam generator particularly for pressurized-water reactors comprising an elongated pressure vessel, a bundle of heat exchanger tubes located in the vessel and extending substantially parallel to one another in the longitudinal direction of the vessel, and a pair of spaced-apart tube support plates mounted in the vessel and formed with recesses wherein respective ends of said tubes extend, said tubes being spaced from one another a distance that is only a fraction of the diameter thereof, and having a reduced diameter over a length thereof in the order of several decimeters adjacent said tube support plates.
Claim 3
Dependent Claim
22 words
Steam generator according to claim 1 wherein one of said end support plates has a base floatingly suspended in said pressure vessel.
Claim 4
Dependent Claim
75 words
Steam generator according to claim 1 wherein said pressure Vessel has an outer casing, and said tube support plates are located at opposite ends of said pressure vessel, said pressure vessel being of widened construction at said ends thereof and having at said widened ends connections to a primary and a secondary fluid flow path passing through said bundle of heat exchanger tubes and openings formed in said pressure vessel casing at said widened ends.
Claim 5
Dependent Claim
53 words
Steam generator according to claim 1 including spacers located between adjacent tubes of said bundle, said spacers being in continuous engagement with said tubes along the entire length thereof between said lengths of reduced diameter, for spacing said tubes from one another so as to form a fluid flow path between said tubes.
Claim 6
Dependent Claim
19 words
Steam generator according to claim 4, wherein said spacers are formed of wires substantially helically wound on said tubes.
Claim 7
Dependent Claim
22 words
Steam generator according to claim 4 wherein said spacers are formed of twisted sheet-metal strips located in intermediate spaces between said tubes.
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) | 1974-09-06 | 1975-03-08 | 1975-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-06 | 1979-03-08 | 1979-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-06 | 1983-03-08 | 1983-09-07 | $7700.00 | Window Closed / Lapsed |