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August 4–7, 2024
Marco Island, FL|JW Marriott Marco Island
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Fusion Science and Technology
Latest News
Vogtle-3 shuts down for valve issue
One of the new Vogtle units in Georgia was shut down unexpectedly on Monday last week for a valve issue that has been investigated and repaired. According to multiple local news outlets, Georgia Power reported on July 17 that unit 3 was back in service.
Southern Company spokesperson Jacob Hawkins confirmed that Vogtle-3 went off line at 9:25 p.m. on July 8 “due to lowering water levels in the steam generators caused by a valve issue on one of the three main feedwater pumps.”
A. B. Sazonov, G. V. Veretennikova, E. P. Magomedbekov
Fusion Science and Technology | Volume 54 | Number 2 | August 2008 | Pages 584-587
Technical Paper | Materials Interactions | doi.org/10.13182/FST08-A1883
Articles are hosted by Taylor and Francis Online.
Mineral and synthetic oils used as lubricants or operating fluids in pumps are mixtures of branched or cyclic saturated hydrocarbons. They are chemically inert but their slow partial oxidation is possible even at room temperature. Specific activity of pump oils contacted with gaseous tritium for a long time may exceed 1013 Bq/kg.Studies of waste oils show that more than 90% of the radionuclide is bound with oxidation products. This selectivity is owned to predominant formation of quasifree tritons or 3HeT+ ions when one of the two nuclei in the T2 molecule decays. The sequence of ion-molecule triton transport reactions is the mechanism responsible for accumulation of tritium by oxidation products with higher proton affinity.The most effective technique of oil decontamination is adsorption of tritiated species by polar adsorbents (silica gels, zeolites). The detritiation degree for these adsorbents amounts to 95%. Then complete thermal oxidative destruction can be used to convert adsorbed organic compounds into CO2 and water. Thus, adsorption, thermal oxidation and adsorbent regeneration may be proposed as the technology of tritium recycling since HTO returns to the isotope separation system. As a result, the radiation danger related with storage of high activity waste oils can be significantly decreased.