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Division Spotlight
Operations & Power
Members focus on the dissemination of knowledge and information in the area of power reactors with particular application to the production of electric power and process heat. The division sponsors meetings on the coverage of applied nuclear science and engineering as related to power plants, non-power reactors, and other nuclear facilities. It encourages and assists with the dissemination of knowledge pertinent to the safe and efficient operation of nuclear facilities through professional staff development, information exchange, and supporting the generation of viable solutions to current issues.
Meeting Spotlight
Utility Working Conference and Vendor Technology Expo (UWC 2024)
August 4–7, 2024
Marco Island, FL|JW Marriott Marco Island
Standards Program
The Standards Committee is responsible for the development and maintenance of voluntary consensus standards that address the design, analysis, and operation of components, systems, and facilities related to the application of nuclear science and technology. Find out What’s New, check out the Standards Store, or Get Involved today!
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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.”
Yoshiharu Sakamura, Masaaki Akagi
Nuclear Technology | Volume 179 | Number 2 | August 2012 | Pages 220-233
Technical Paper | Reprocessing | doi.org/10.13182/NT179-220
Articles are hosted by Taylor and Francis Online.
A series of pyrochemical reprocessing tests involving pretreatment, electrolytic reduction, and electrorefining processes were conducted using [approximately]100 g of simulated spent oxide fuel. In the pretreatment process, a simulated spent oxide fuel consisting of dense UO2 pellets containing typical fission product elements (strontium, cerium, neodymium, samarium, zirconium, palladium, and molybdenum) was powderized by voloxidation, which corresponds to fuel decladding. Porous oxide pellets were then fabricated from the obtained oxide powder. In the electrolytic reduction process, [approximately]100 g of the porous oxide pellets was loaded in a cathode basket and electrolytic reduction was performed for 7.6 h in a LiCl-Li2O salt at 650°C. The UO2 was reduced to metallic uranium with a reduction yield of 99.2% and a current efficiency of 74%. All the strontium dissolved into the salt. It was verified that the preparation of porous oxide pellets was highly advantageous in improving the rate of oxide reduction. In the subsequent electrorefining process, the reduction product was loaded in an anode basket and electrorefining was performed for 5.8 h in a LiCl-KCl-UCl3 salt at 500°C. Most of the uranium in the reduction product was anodically dissolved in the salt and the refined uranium metal was collected on a stainless steel cathode. Most of the rare earth elements were dissolved in the salt, whereas zirconium, palladium, and molybdenum remained in the anode residue. The concentration of UCl3 in the salt slightly decreased during electrorefining, since U3+ reacted with the oxides contained in the reduction product to form a uranium oxide precipitate.