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Division Spotlight
Accelerator Applications
The division was organized to promote the advancement of knowledge of the use of particle accelerator technologies for nuclear and other applications. It focuses on production of neutrons and other particles, utilization of these particles for scientific or industrial purposes, such as the production or destruction of radionuclides significant to energy, medicine, defense or other endeavors, as well as imaging and diagnostics.
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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.”
C. B. Ashmore, D. Brown, S. Dickinson, H. E. Sims
Nuclear Technology | Volume 129 | Number 3 | March 2000 | Pages 387-397
Technical Paper | Reactor Operations and Control | doi.org/10.13182/NT00-A3069
Articles are hosted by Taylor and Francis Online.
Radiolytic oxidation is considered to be the main mechanism for the formation of I2 from aqueous CsI in the containment of a water-cooled reactor after a loss-of-coolant accident (LOCA) in a pressurized water reactor. Despite the amount of study over the last 60 yr on the radiation chemistry of iodine, there have, until recently, been few consistent sets of experiments spanning a wide enough range of conditions to allow models to be verified with confidence.The results from a set of experiments carried out to remedy this deficiency are described. In this work the rate of evolution of I2 from sparged irradiated borate solutions containing CsI labeled with 131I was measured on-line over a range of conditions. This work involved the measurement of the effects of pH, temperature, O2 concentration, I- concentration, phosphate concentration, dose-rate, and impurities on the rate of evolution of I2. The range of conditions was chosen to span as closely as possible the range of conditions expected in a LOCA, but also to help to elucidate some of the mechanisms especially at high pH.The pH was found to be a very important factor in determining iodine volatility. Over the temperature range studied, the extent of oxidation decreased with increasing temperature, but this was counteracted, to a greater or lesser extent, by the decrease in partition coefficient. The oxygen concentration was more important in solutions not containing phosphate. The fractional oxidation was not particularly dependent on iodide concentration, but GI2 was very dependent on [I-]. There was no effect of added impurities, Fe, Mn, Mo, or organics although, in separate work, silver was found to have a very important effect.During attempts to interpret the data, it was found that it was necessary to consider the iodine atom as a volatile species with a partition coefficient of 1.9 taken from thermodynamic data. The modeling work is described in a separate paper.