US3721116A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for detecting steam leakage in a heat exchanger having circulation tubes surrounded by liquid sodium and devices for the application of said method
Assignee: Electricite de France SA
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Filing: 1970-12-01
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Granted: 1973-03-20
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Expires: 1990-12-01
Abstract
Abstract THE LEAK FLOW RATE, IN PARTICULAR FOR THE DETERMINATION OF A MICRO-LEAK, IN HEAT EXCHANGERS EMPLOYED IN CONJUNCTION WITH FAST NUCLEAR REACTORS WHICH ARE COOLED BY LIQUID SODIUM IS DETERMINED EMPLOYING KNOWN MEANS BY LOCATING A GIVEN GROUP OF TUBES INCLUDING THE TUBE WHICH EXHIBITS LEAKAGE AMONG ALL THE TUBES OF A HEAT EXCHANGER WITHOUT MODIFYING THE OPERATING CONDITIONS OF THE INSTALLATION. THE TUBE IN THE GROUP IN WHICH A LEAK HAS DEVELOPED IS LOCATED. THE DEFECTIVE TUBE IS THEM PLUGGED OUTSIDE THE TANK WITHOUT DRAINING THE SODIUM CONTAINED THEREIN AND WITHOUT CONNECTING THE STREAM CIRCULATION TUBES TO THE ATMOSPHERE. D R A W I N G
Inventors
- 👤 A Brachet
- 👤 L Lannou
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 02:53
CPC Classifications
F; F28; F28F; F28F1/00; F28F1/003; F22; F22B; F22B37/00; F22B37/02; F22B37/42; F22B37/421; F28D; F28D7/00; F28D7/005; G; G01; G01M; G01M3/00; G01M3/02; G01M3/04; G01M3/20; G01M3/22; G01M3/226; G01M3/228; G21; G21C; G21C17/00; G21C17/002; Y; Y02; Y02E; Y02E30/00; Y02E30/30
Claims Analysis
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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) | 1976-03-19 | 1976-09-18 | 1977-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-19 | 1980-09-18 | 1981-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-19 | 1984-09-18 | 1985-03-20 | $7700.00 | Window Closed / Lapsed |