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Division Spotlight
Young Members Group
The Young Members Group works to encourage and enable all young professional members to be actively involved in the efforts and endeavors of the Society at all levels (Professional Divisions, ANS Governance, Local Sections, etc.) as they transition from the role of a student to the role of a professional. It sponsors non-technical workshops and meetings that provide professional development and networking opportunities for young professionals, collaborates with other Divisions and Groups in developing technical and non-technical content for topical and national meetings, encourages its members to participate in the activities of the Groups and Divisions that are closely related to their professional interests as well as in their local sections, introduces young members to the rules and governance structure of the Society, and nominates young professionals for awards and leadership opportunities available to members.
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.”
V. Subramanian, P. Sahoo, N. Malathi, R. Ananthanarayanan, R. Baskaran, B. Saha
Nuclear Technology | Volume 165 | Number 3 | March 2009 | Pages 257-269
Technical Paper | Fission Reactors | doi.org/10.13182/NT09-A4100
Articles are hosted by Taylor and Francis Online.
In the context of safety analysis of fast reactors, information on chemical speciation of sodium aerosol formed due to sodium fire is important. Clough and Garland studied theoretically the formation of NaOH and Na2CO3. Hofmann et al. and Cherdron and Jordan reported their experimental results on chemical speciation of sodium aerosols after certain periods of exposure to atmosphere based on wet chemical analysis. It is difficult to obtain quantitative information on chemical species present in dilute solutions by conventional chemical analysis. Appropriate chemical instrumentation is needed for this purpose, the development of which, along with the methodology adopted for chemical speciation, is discussed in this paper. The present technique provides rapid information on the composition of species as a function of time following a sodium fire. Experiments were conducted in the Aerosol Test Facility (ATF) in which sodium aerosols were generated, collected on filter papers, dissolved in water, and subjected to chemical characterization using a laboratory-developed high-resolution conductometric titration facility. The titration plots revealed the presence of NaOH and Na2CO3 as the two major components in the dissolved aqueous solutions. The concentrations of these species were derived with due consideration of the hydrolysis of Na2CO3 in water. It was possible to relate these concentrations to the compositions of the samples on the filter paper residues through a separate series of measurements on the dissolved solutions of the synthetic mixtures of NaOH and Na2CO3 of known compositions in the solid phase. It has been confirmed by our experimental results that for the initial mass concentration of the aerosol at ~2 gm-3 and in a confined environment of 1 m3, at a relative humidity of 50 to 65%, the entire species of sodium compound aerosol becomes sodium carbonate within 500 s from the onset of fire.