Forced circulation
Abstract
Abstract THIS INVENTION INVOLVES A SYSTEM FOR PROCESSING LIQUID WASTERS CONTAINING DISSOLVED SOLIDS WHICH RESULT FROM THE OPERATION OF A NUCLEAR STEAM SUPPLY SYSTEM. THE PROCESSING SEQUENCE IS TO FIRST COLLECT THE LIQUID WASTES IN HOLD-UP TANK (12 AND 14). WHEN SUFFICIENT VOLUME IS COLLECTED, THE LIQUID WASTE IS PUMPED THROUGH A FILTER (28) TO THE FIRST STAGE OF A DUAL EVAPORATION PROCESS. THIS FIRST STAGE, THE PRE-CONCENTRATOR, CONSISTS OF A FORCED-CIRCULATION EVAPORTOR (30) WITH A VARY HIGH BOTTOMS-TO-DISTILLATE DECONTAMINATION FACTOR. THE CONCENTRATE FROM THIS UNIT IS FED TO ONE OF TWO THIN FILM EVAPORATORS (32) WHICH FURTHER CONCENTRATES THE LIQUID WASTE AND DISCHARGES SOLIDS TO LOW MOISTURE CONTENT. THE SOLIDS ARE THAN DRUMMED AND SHIPPED OFF-SITE FOR DISPOSAL. THE DISTILLATE PRODUCED FROM THE THIN FILM EVAPORATOR IS RECYCLED BACK TO THE ORIGINAL COLLECTION TANKS IN ORDER TO MAINTAIN A VARY HEIGH OVERALL DECONTAMINATION FACTOR FOR THE DRILLATE.
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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) | 1978-10-06 | 1979-04-07 | 1979-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-06 | 1983-04-07 | 1983-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-06 | 1987-04-07 | 1987-10-07 | $7700.00 | Window Closed / Lapsed |