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Division Spotlight
Fusion Energy
This division promotes the development and timely introduction of fusion energy as a sustainable energy source with favorable economic, environmental, and safety attributes. The division cooperates with other organizations on common issues of multidisciplinary fusion science and technology, conducts professional meetings, and disseminates technical information in support of these goals. Members focus on the assessment and resolution of critical developmental issues for practical fusion energy applications.
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 since 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. local time 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.”
Takatoshi Hijikata, Masahiro Sakata, Hajime Miyashiro, Kensuke Kinoshita, Tatsuhiro Higashi, Tadaharu Tamai
Nuclear Technology | Volume 115 | Number 1 | July 1996 | Pages 114-121
Technical Note | Enrichment and Reprocessing System | doi.org/10.13182/NT96-A35280
Articles are hosted by Taylor and Francis Online.
High-level radioactive waste (HLW) from reprocessing (Purex) light water reactor spent fuel contains a small number of long-lived nuclides, mainly actinide elements, having half-lives of longer than one million years. If actinide elements could be separated from HLW and transmuted to short-lived nuclides, not only would waste management be much simpler but also public support for nuclear power generation might be easier to obtain. Central Research Institute of Electric Power Industry (CRIEPI), Japan, has proposed a pyrometallurgical process to separate actinides from HLW. When the solvent used in the Purex process is reclaimed by NaCO3 and NaOH, a waste stream containing sodium with fission products and actinides is produced also. The focus of CRIEPI is the disposal of HLW from both the Purex and the solvent rinse processes. In this concept, HLW is converted to chlorides, the actinides as molten chlorides are reduced by lithium metal and extracted into liquid cadmium, and finally, the actinides are purified by electrorefining. However, in the extraction of actinides into liquid cadmium, some of the rare earth elements are expected to be recovered together with the actinides because of their chemical similarity. Thus, it is necessary to obtain thermodynamic data of the actinides and rare earth elements in molten chlorides and liquid cadmium. The distribution coefficients for uranium, neptunium, and rare earth elements are determined in molten LiCl-KCl eutectic salt/liquid cadmium (LiCl-KCl system) and molten LiCl-NaCl salt/liquid cadmium (LiCl-NaCl system) systems. The equilibrium distribution of uranium, neptunium, and rare earth elements is also calculated based on the Gibbs energies of formation of the metal chlorides and their activity coefficients in molten salts and cadmium.