Austenitic stainless steels for use in nuclear reactors
Abstract
Abstract AN AUSTENITIC STAINLESS STEEL FOR USE IN A WATER NUCLEAR REACTOR WHEREIN THE STEEL IS IN CONTACT WITH COOLANT AT ELEVATED TEMPERATURER AND PRESSURE, THE ALLOY CHARACTERIZED IN THAT IT HAS A LOW NEUTRON CAPTURE CROSS-SECTION, IS HIGHLY RESISTANT TO STRESS CORROSION IN THE PRESENCE OF CHLORIDES AND HAS A RELATIVELY HIGH STRENGTH, CONSISTING ESSENTIALLY OF BY WEIGHT, FROM 17 TO 22% NICKEL, FROM 14 TO 19% CHROMIUM, FROM 0.007 TO 0.015% CARBON, A MAXIMUM OF 0.015% NITROGEN, THE TOTAL OF CARBON AND NITROGEN NOT EXCEEDING 0.025%, A MAXIMUM OF 1.5% MANGANESE AND 0.02% COBALT, MANGANESE AND COBALT ARE ELEMENTS WHICH WHEN EXPOSED TO A NEUTRON FLUX ARE TRANSFORMED AT LEAST IN PART TO RADIOACTIVE ISOTOPES OF HIGH ACTIVITY, A MAXIMUM OF 0.5% SILICON, OTHER IMPURITIES NOT EXCEEDING 0.5%, AND THE BALANCE IRON. A NUCLEAR FUEL ELEMENT CLADDING EMPOLYING SAID STEEL IS ALSO DISCLOSED.
Inventors
- 👤 Robert J Allio
- 👤 Kenneth C Thomas
- 👤 Harry M Ferrari
Bibliographic Details
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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) | 1974-02-15 | 1974-08-17 | 1975-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-15 | 1978-08-17 | 1979-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-15 | 1982-08-17 | 1983-02-16 | $7700.00 | Window Closed / Lapsed |