US3625815A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control system for controlling a nuclear reactor plant
Assignee: Sulzer AG
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Filing: 1968-04-30
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Granted: 1971-12-07
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Expires: 1988-04-30
Abstract
Abstract The control rods of the different zones of the plant are moved simultaneously with or independently of the control rods of the other zones. Control of the rod movements is made dependent on the pressure of the working medium of the plant as well as the outlet temperature of the reactor coolant. Additionally, a control of the live steam mass flow of the plant is achieved by comparison between the live steam mass flow and the overall neutron flux of the nuclear reactor.
Inventors
- 👤 Ygal Fishman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:56
CPC Classifications
G; G21; G21D; G21D3/00; G21D3/08; G21D3/10; G21C; G21C7/00; G21C7/36; Y; Y02; Y02E; Y02E30/00; Y02E30/30
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
35 words
A control system as set forth in claim 1 wherein each zone has a coolant passing therethrough and said first measuring means includes means to measure the temperature of the coolant passing through each zone.
Claim 2
Dependent Claim
24 words
A control system as set forth in claim 1 wherein said first measuring means includes means to measure the neutron flux in each zone.
Claim 3
Dependent Claim
36 words
A control system as set forth in claim 3 wherein each zone has a coolant passing therethrough and said first measuring means further includes means to measure the temperature of the coolant passing through each zone.
Claim 4
Dependent Claim
50 words
A control system as set forth in claim 1 wherein each zone has a coolant passing therethrough and an outlet-connecting branch line for passage of the coolant from said zone, and wherein said first measuring means includes means to measure the temperature of the reactor coolant in said outlet-connecting branch.
Claim 5
Dependent Claim
54 words
A control system as set forth in claim 5 further comprises means for determining the mean value of the measured temperAture of said zones and a control loop means connected to said means for determining the mean value for controlling the mass flow of coolant through said zones to maintain the mean value constant.
Claim 6
Dependent Claim
70 words
A control system as set forth in claim 1 wherein the nuclear power plant includes a steam-generating plant, and which further comprises a second control means for controlling the total power of said reactor in dependence upon the power need of said steam-generating plant, said second control means effecting a zero corrective action upon a simultaneous change in steam-generating plant power need and an equivalent change in total reactor power.
Claim 7
Dependent Claim
16 words
A control system as set forth in claim 1 wherein each zone is prismatic in shape.
Claim 8
Dependent Claim
22 words
A control system as set forth in claim 1 wherein said reactor comprises two groups of said zones arranged in tiered relationship.
References Cited (Backward Citations)
GB845207A
Cited
US3391058A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-12-06 | 1975-06-07 | 1975-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-06 | 1979-06-07 | 1979-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-06 | 1983-06-07 | 1983-12-07 | $7700.00 | Window Closed / Lapsed |