US3773616A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nuclear reactor comprising a core cover
Assignee: Commissariat à l'Énergie Atomique et Aux Énergies Alternatives
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Filing: 1971-10-13
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Granted: 1973-11-20
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Expires: 1991-10-13
Abstract
Abstract A core cover is carried by an inner rotating shield plug which is mounted in eccentric relation to an outer rotating shield plug and is smaller in diameter than the outer plug and the reactor core. The cover forms above the core a lateral projection with respect to the inner plug. The rotation of the inner plug about its own axis is intended to free part of the reactor core so as to permit handling of fuel assemblies within the core by means of an articulated handling arm which is carried by the outer plug.
Inventors
- 👤 M Aubert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 04:37
CPC Classifications
G; G21; G21C; G21C13/00; G21C13/02; G21C13/06; G21C13/073; G21C19/00; G21C19/16; Y; Y02; Y02E; Y02E30/00; Y02E30/30
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
151 words
A nuclear reactor comprising a core cover, two rotatable shield plugs including an inner plug which supports the cover by means of an axial extension and is mounted eccentrically within the second rotating shield plug or outer plug which is larger in diameter and disposed in coaxial relation to the reactor core, and a fuel-assembly handling flask mounted laterally on said outer plug above the reactor core, the inner plug having a smaller diameter than the reactor core and the cover forming above the reactor core a lateral projection with respect to said plug, the rotation of the inner plug about its own axis exposing part of the reactor core for handling of fuel assemblies within the core by means of an articulated handling arm carried by the outer plug, rotation of the cover by the inner plug moving the cover out of the axis of rotation of the outer plug.
Claim 2
Dependent Claim
151 words
A nuclear reactor comprising a core cover, two rotatable shield plugs including an inner plug which supports the cover by means of an axial extension and is mounted eccentrically within the second rotating shield plug or outer plug which is larger in diameter and disposed in coaxial relation to the reactor core, and a fuel-assembly handling flask mounted laterally on said outer plug above the reactor core, the inner plug having a smaller diameter than the reactor core and the cover forming above the reactor core a lateral projection with respect to said plug, the rotation of the inner plug about its own axis exposing part of the reactor core for handling of fuel assemblies within the core by means of an articulated handling arm carried by the outer plug, rotation of the cover by the inner plug moving the cover out of the axis of rotation of the outer plug.
Claim 3
Dependent Claim
39 words
A reactor according to claim 1, said reactor having around the core a neutron shield comprising a top wall extending above the reactor core, said wall being of two separate sections secured respectively to each of the two plugs.
Claim 4
Dependent Claim
19 words
A reactor according to claim 2, the neutron shield surrounding laterally the fuel-handling flask and the articulated handling arm.
Claim 5
Dependent Claim
32 words
A reactor according to claim 2, the top wall of the neutron shield being immediately above the core cover and having a radial passage for the displacement of the articulated handling arm.
Claim 6
Dependent Claim
46 words
A reactor according to claim 1, including a radial external surface for the axial extension and a radial external surface for the core cover, the external surface of the axial extension of the inner plug being internally tangent to the external surface of the core cover.
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) | 1976-11-19 | 1977-05-21 | 1977-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-19 | 1981-05-21 | 1981-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-19 | 1985-05-21 | 1985-11-20 | $7700.00 | Window Closed / Lapsed |