US3607644A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid-safety-rod system with a flexible diaphragm accumulator
Assignee: European Atomic Energy Community Euratom
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Filing: 1968-10-02
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Granted: 1971-09-21
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Expires: 1988-10-02
Abstract
Abstract A liquid-safety-rod system for nuclear reactors comprising a lower poison-solution reservoir, a poison-solution accumulator containing a flexible diaphragm connected therewith, a source of high-pressure gas to force the poison solution out of the accumulator into a connecting collector and thence into tubes extending through the reactor core and a washing circuit comprising a washing-liquid reservoir, a washing-residue reservoir and a pump connected to said tubes.
Inventors
- 👤 Alberto Agazzi
- 👤 Armando Broggi
- 👤 Sergio Galli De Paratesi
- 👤 Luciano Ghiurghi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:08
CPC Classifications
G; G21; G21C; G21C7/00; G21C7/06; G21C7/22; G21C9/00; G21C9/02; G21C9/033; Y; Y02; Y02E; Y02E30/00; Y02E30/30
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
24 words
A liquid-safety-rod system as claimed in claim 1, in which the upper ends of said tubes are connected to at least one upper collector.
Claim 2
Dependent Claim
47 words
A liquid-safety-rod system as claimed in claim 1, in which the upper ends of said tubes, said overflow accumulator, said lower reservoir and said first chamber are all connected to a reference low gaseous pressure, there being an isolating valve in the connection from said first chamber.
Claim 3
Independent Claim
239 words
A system of liquid safety rods for a nuclear reactor having a core comprising tubes passing through said core from bottom to top, issuing from at least one lower collector and terminating in at least one upper collector, a washing circuit comprising a washing-liquid reservoir, a washing-residue reservoir and a pump, said washing-liquid reservoir being connected to said lower collector through said pump and connecting pipes, and said washing-residue reservoir being connected to said upper collector by valved pipe means, and a poison-solution circuit comprising a poison-solution reservoir and a pump, connected by conduit means to a poison-solution accumulator with a diaphragm, having at the bottom of said accumulator a chamber containing the poison solution, and an overflow reservoir situated below the level of the reactor core, each said poison-solution accumulator and said overflow reservoir being connected to said lower collector, said overflow reservoir having a discharge pipe issuing from a level just below that of the inlet of the rods in the reactor core and terminating in said poison-solution reservoir which is situated lower than the connection of said overflow reservoir and said discharge pipe, said poison-solution accumulator having a gas chamber above said diaphragm connected by means of valves either to an intake of high-pressure driving gas or to a reference low pressure, said reference low pressure also being connected to said washing-liquid reservoir, said washing-residue reservoir, said poison-solution reservoir, said overflow reservoir and said upper collector.
Claim 4
Dependent Claim
38 words
A system as claimed in claim 4, wherein said poison-solution chamber of said diaphragm accumulator is connected by a quick-acting valve to said lower collector, said overflow reservoir also being connected to said lower collector by valve means.
Claim 5
Dependent Claim
60 words
A system as claimed in claim 4, wherein the gas chamber of said diaphragm accumulator is connected either to high pressure or to said reference low pressure by means of a quick-acting three-way valve, the lower collector being connected by means of a valve to the overflow reservoir and to the liquid chamber of said diaphragm accumulator without intermediate means.
Claim 6
Dependent Claim
76 words
A system as claimed in claim 4, wherein said diaphragm accumulator has a liquid chamber iN the form of a part-spherical bowl and a gas chamber so constructed that the pressure of the driving gas is distributed uniformly over the diaphragm, and having means for ensuring the reproducibility of the position of the diaphragm and therefore of the volume of poison solution, and wherein the center of the diaphragm has reinforcement means, which limits its deformation.
Claim 7
Dependent Claim
29 words
A system as claimed in claim 7, wherein said means for ensuring the reproducibility of the diaphragm position are ribs disposed on the interior surface of said gas chamber.
Claim 8
Dependent Claim
35 words
A system as claimed in claim 4, wherein said diaphragm accumulator is disposed such that said diaphragm is substantially at the level of said discharge pipe when said liquid chamber is full of poison solution.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-20 | 1975-03-22 | 1975-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-20 | 1979-03-22 | 1979-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-20 | 1983-03-22 | 1983-09-21 | $7700.00 | Window Closed / Lapsed |