Prestressed concrete pressure vessel for nuclear reactors
Abstract
Abstract AT LEAST ONE OF THE ENDS OF THE PRESSURE VESSEL IS PIERCED BY AN OPENING DELIMITED BY TWO SUCCESSIVE FRUSTOCONICAL FACES WHICH ARE FLARED TOWARDS THE EXTERIOR. IN ORDER TO CLOSE THE OPENING, A SLAB OR CORRESPONDING SHAPE IS APPLIED AGAINST THE FIRST FACE OR INTERNAL FACE AND A SERIES OF WEDGE-SHAPED ELEMENTS ARE CLAMPED BOTH AGAINST SAID FIRST FACE AND AGAINST THE SECOND FACE OF THE OPENING BY MEANS OF RECTILINEAR CABLES WHICH ARE PASSED RIGHT THROUGH THE WEDGE ELEMENTS AND THE PRESSURE VESSEL WALL. PERIPHERAL PRESTRESSING CABLE SERVE TO COMPLETE THE FORCIBLE APPLICATION OF THE SLAB AND WEDGE ELEMENTS AGAINST THE VESSEL CYLINDER SO AS TO FORM A TIGHT PRESSURE-RESISTANT ASSEMBLY. NO RELATIVE DISPLACEMENT BETWEEN THE DIFFERENT COMPONENTS NEED BE FEARED AT THE TIME OF APPROACH TO FULL PRESSURE WITHIN THE PRESSURE VESSEL OR DURING OPERATION OF THE REACTOR.
Inventors
- 👤 Jean-Louis Cruset
- 👤 Pierre Launay
- 👤 Jacques Lemasson
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-08 | 1974-09-07 | 1975-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-08 | 1978-09-07 | 1979-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-08 | 1982-09-07 | 1983-03-09 | $7700.00 | Window Closed / Lapsed |