US4608223A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Abnormal transient display system for nuclear reactor operation
Assignee: B&W Nuclear Service Co
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Filing: 1982-03-01
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Granted: 1986-08-26
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Expires: 2002-03-01
Abstract
Abstract A system for monitoring a limited number of operating conditions in a nuclear reactor and for graphically displaying same on a display device is disclosed. The system parameters selected are those which typically change as a result of a reactor trip. As long as these system parameters remain within a "post-trip window" on the graphic display, the power plant is operating normally. If, however, any of the foregoing system parameters falls outside this "window", this is an immediate indication to the power plant operator to institute the necessary procedures to remedy same. A sequential controller (26) is provided to continuously sequentially sample the foregoing operating parameters and to transmit data regarding same to the display device.
Inventors
- 👤 Robert C. Twilley, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:49
CPC Classifications
G; G21; G21C; G21C17/00; Y; Y02; Y02E; Y02E30/00; Y02E30/30
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
116 words
A system for monitoring abnormal transient conditions in a coolant fed pressurized water nuclear reactor installation comprising display means for providing a static display area formed from a pressure-temperature area which is bounded by a saturation curve and enclosing certain reactor operating perameters indicating that the nuclear steam supply system installation is within normal operating limits within this static display area and means for providing a dynamic display of reactor coolant hot leg temperature, said dynamic display being superimposed on said static display to indicate normal reactor operation so long as the dynamic display is within the static display area, and means for sequentially sampling said operating perameters permitting the continuous updating of said dynamic display.
Claim 2
Independent Claim
116 words
A system for monitoring abnormal transient conditions in a coolant fed pressurized water nuclear reactor installation comprising display means for providing a static display area formed from a pressure-temperature area which is bounded by a saturation curve and enclosing certain reactor operating perameters indicating that the nuclear steam supply system installation is within normal operating limits within this static display area and means for providing a dynamic display of reactor coolant hot leg temperature, said dynamic display being superimposed on said static display to indicate normal reactor operation so long as the dynamic display is within the static display area, and means for sequentially sampling said operating perameters permitting the continuous updating of said dynamic display.
Claim 3
Dependent Claim
25 words
The system as defined in claim 1 wherein said static display is comprised of a graphical display having pressure versus temperature as the axes thereof.
Claim 4
Dependent Claim
30 words
The system as defined in claim 2 wherein reactor coolant and steam outlet pressure existing in the nuclear steam supply system are displayed on one axis of said graphical display.
Claim 5
Dependent Claim
31 words
The system as defined in claim 2 wherein reactor coolant and steam outlet temperature existing in the nuclear steam supply system are displayed on the other axis of said graphical display.
Claim 6
Dependent Claim
30 words
The system as defined in claim 1 wherein said static display further includes an indication of the saturation curve and the subcooled margin line of the nuclear steam supply system.
Claim 7
Dependent Claim
24 words
The system as defined in claim 1 wherein said dynamic display includes an indication of the cold leg temperature of the reactor coolant system.
Claim 8
Dependent Claim
23 words
The system as defined in claim 1 wherein said dynamic display includes an indication of the saturation temperature of the steam input pressure.
Claim 9
Dependent Claim
15 words
The system as defined in claim 1 further including means for recording said dynamic display.
References Cited (Backward Citations)
US4258424A
Cited
US4292129A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-08-25 | 1990-02-24 | 1990-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-08-25 | 1994-02-24 | 1994-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-08-25 | 1998-02-24 | 1998-08-26 | $7700.00 | Window Closed / Lapsed |