US3036964A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control method and apparatus
Assignee: Northrop Grumman Space and Mission Systems Corp
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Filing: 1957-11-12
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Granted: 1962-05-29
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Expires: 1977-11-12
Abstract
No abstract record available.
Inventors
- 👤 Wendell A Horning
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:28
CPC Classifications
G; G21; G21C; G21C7/00; G21C7/26; Y; Y02; Y02E; Y02E30/00; Y02E30/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
METHOD OF OPERATING A BOILING WATER NUCLEAR REACTOR CORE, COMPRISING THE STEPS OF: DISPLACING WATER MODERATOR BY INSERTING INTO SAID REACTOR CORE A PLURALITY OF MODERATOR CONTROL ELEMENTS, EACH OF A MATERIAL HAVING A NEUTRON MODERATION CHARACTERISTIC APPRECIABLY LESS THAN THAT OF WATER AND HAVING A NEUTRON ABSORPTION CHARACTERISTIC AT LEAST AS LOW AS THAT OF ALUMINUM, THEREFORE DISPLACING A DETERMINABLE PORTION OF THE WATER MODERATOR OF SAID REACTOR CORE FROM PROXIMITY OF THE CORE DURING LOW TEMPERATURE OPERATION WHEN THE WATER MODERATOR IS MOST DENSE; RAISING THE POWER LEVEL OF OPERATION OF SAID REACTOR CORE, AND THEN WITHDRAWING SAID CONTROL ELEMENTS FROM SAID REACTOR CORE.
Claim 2
Dependent Claim
106 words
METHOD OF OPERATING A BOILING WATER NUCLEAR REACTOR CORE, COMPRISING THE STEPS OF: DISPLACING WATER MODERATOR BY INSERTING INTO SAID REACTOR CORE A PLURALITY OF MODERATOR CONTROL ELEMENTS, EACH OF A MATERIAL HAVING A NEUTRON MODERATION CHARACTERISTIC APPRECIABLY LESS THAN THAT OF WATER AND HAVING A NEUTRON ABSORPTION CHARACTERISTIC AT LEAST AS LOW AS THAT OF ALUMINUM, THEREFORE DISPLACING A DETERMINABLE PORTION OF THE WATER MODERATOR OF SAID REACTOR CORE FROM PROXIMITY OF THE CORE DURING LOW TEMPERATURE OPERATION WHEN THE WATER MODERATOR IS MOST DENSE; RAISING THE POWER LEVEL OF OPERATION OF SAID REACTOR CORE, AND THEN WITHDRAWING SAID CONTROL ELEMENTS FROM SAID REACTOR CORE.
References Cited (Backward Citations)
US2832732A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-05-28 | 1965-11-27 | 1966-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-05-28 | 1969-11-27 | 1970-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-05-28 | 1973-11-27 | 1974-05-29 | $7700.00 | Window Closed / Lapsed |