US3915792A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transfer hood for handling fuel assemblies in nuclear reactors and especially fast reactors
Assignee: Commissariat à l'Énergie Atomique et Aux Énergies Alternatives
•
Filing: 1973-06-01
•
Granted: 1975-10-28
•
Expires: 1993-06-01
Abstract
Abstract A hood for transferring fuel assemblies between two or more separate guide ramps inclined to the vertical at the same angle of slope and extending respectively through a first passage into the reactor vessel and through a second passage into a fuelassembly storage chamber. The hood comprises at least one shielded duct joined to a flanged rotating portion which is so arranged that the open lower end of the shielded duct is positioned in the line of extension of one guide ramp and then the other as a result of displacement of the rotating portion.
Inventors
- 👤 Michel Aubert
- 👤 Daniel Merland
- 👤 Charley Renaux
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:13
CPC Classifications
G; G21; G21C; G21C19/00; G21C19/20; Y; Y02; Y02E; Y02E30/00; Y02E30/30
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
189 words
A TRANSFER HOOD FOR A NUECLEAR AND ESPECIALLY A FAST REACTOR COMPRISING A CORE, A GROUP OF FUEL ASSEMBLIES, FOR SAID CORE, A PRESSURE VESSEEL CONTAINING SAID CORE, AT LEAST ONE SEPARATE CHAMBER ADJACENT SAID VESSEL FOR THE STORAGE OF FUEL ASSEMBLES AFTER WITHDRAWAL OF SAID ASSEMBLIES FROM SAID PRESSURE VESSEL, AT LEAST TWO SEPARTE AND OBLIQUE GUIDE RAMPS HAVING THE SAME ANGLE OF INCLINATION WITH RESPECT TO THE VERTICAL, ONE OF SAID GUIDE RAMPS EXTENDING THROUGH A FIRST PASSAGE INTO SAID PRESSURE VESSEL, THE SECOND OF SAID GUIDE RAMPS EXTENDING THROUGH A SECOND PASSAGE INTO SAID FUEL ASSEMBLY STORAGE THROUGH, A ROTATING TRANSFER HOOD, TWO SHIELDED DUCTS IN SAID HOOD EACH HAVING AN OPEN LOWER END, A HORIZONTAL POSITIONING FLANGE FOR SAID HOOD, SAID HOOD ROTATING ABOUT A VERTICAL AXIS, SAID LOWER ENDS OF SAID SHIELDED DUCTS OPENING OVER ONE OF SAID GUIDE RAMPS AND THEN THE OTHER UPON ROTATION OF SAID HOOD, SAID HORIZONTAL GLANGE OF SAID HOOD INCLUDING A PERIPHERAL TOOTHED RING, A PINION DRIVEN BY A REDUCTION-GEAR MOTOR ENGAGING SAID GING, A SUPPORT FRAME FOR SAID HOOD MOUNTED ON SAID PRESSURE VESSEL, A ROLLER-BEARING MOUNTING
Claim 2
Dependent Claim
189 words
A TRANSFER HOOD FOR A NUECLEAR AND ESPECIALLY A FAST REACTOR COMPRISING A CORE, A GROUP OF FUEL ASSEMBLIES, FOR SAID CORE, A PRESSURE VESSEEL CONTAINING SAID CORE, AT LEAST ONE SEPARATE CHAMBER ADJACENT SAID VESSEL FOR THE STORAGE OF FUEL ASSEMBLES AFTER WITHDRAWAL OF SAID ASSEMBLIES FROM SAID PRESSURE VESSEL, AT LEAST TWO SEPARTE AND OBLIQUE GUIDE RAMPS HAVING THE SAME ANGLE OF INCLINATION WITH RESPECT TO THE VERTICAL, ONE OF SAID GUIDE RAMPS EXTENDING THROUGH A FIRST PASSAGE INTO SAID PRESSURE VESSEL, THE SECOND OF SAID GUIDE RAMPS EXTENDING THROUGH A SECOND PASSAGE INTO SAID FUEL ASSEMBLY STORAGE THROUGH, A ROTATING TRANSFER HOOD, TWO SHIELDED DUCTS IN SAID HOOD EACH HAVING AN OPEN LOWER END, A HORIZONTAL POSITIONING FLANGE FOR SAID HOOD, SAID HOOD ROTATING ABOUT A VERTICAL AXIS, SAID LOWER ENDS OF SAID SHIELDED DUCTS OPENING OVER ONE OF SAID GUIDE RAMPS AND THEN THE OTHER UPON ROTATION OF SAID HOOD, SAID HORIZONTAL GLANGE OF SAID HOOD INCLUDING A PERIPHERAL TOOTHED RING, A PINION DRIVEN BY A REDUCTION-GEAR MOTOR ENGAGING SAID GING, A SUPPORT FRAME FOR SAID HOOD MOUNTED ON SAID PRESSURE VESSEL, A ROLLER-BEARING MOUNTING
Claim 3
Dependent Claim
23 words
A transfer hood according to claim 1, said shielded ducts being inclined to the vertical at the same angle as said guide ramps.
Claim 4
Dependent Claim
59 words
A transfer hood according to claim 1, including a chain-type hoist at the upper end of each of said ducts for controlling a carriage, a flask supported by said carriage containing the fuel assembly to be transferred as said carriage is displaced within said duct and along said inclined guide ramp in the line of extension of said duct.
Claim 5
Dependent Claim
20 words
A transfer hood according to claim 3, including a well sealed to said duct receiving the chain of said hoist.
Claim 6
Dependent Claim
33 words
A transfer hood according to claim 1 including at least one slidevalve body in said frame isolating each of said inclined guide ramps from said shielded ducts during rotation of of said hood.
Claim 7
Dependent Claim
57 words
A transfer hood according to claim 5, including means for applying said valve body against said pressure vessel and said storage chamber in leak-tight manner after rotation of said hood over said inclined guide ramps, said means including at least one spring and an annular bellows element connected to said valve body and to said support frame.
References Cited (Backward Citations)
US3089836A
Cited
US3773616A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-10-27 | 1979-04-28 | 1979-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-27 | 1983-04-28 | 1983-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-27 | 1987-04-28 | 1987-10-28 | $7700.00 | Window Closed / Lapsed |