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Nuclear Nonproliferation Policy
The mission of the Nuclear Nonproliferation Policy Division (NNPD) is to promote the peaceful use of nuclear technology while simultaneously preventing the diversion and misuse of nuclear material and technology through appropriate safeguards and security, and promotion of nuclear nonproliferation policies. To achieve this mission, the objectives of the NNPD are to: Promote policy that discourages the proliferation of nuclear technology and material to inappropriate entities. Provide information to ANS members, the technical community at large, opinion leaders, and decision makers to improve their understanding of nuclear nonproliferation issues. Become a recognized technical resource on nuclear nonproliferation, safeguards, and security issues. Serve as the integration and coordination body for nuclear nonproliferation activities for the ANS. Work cooperatively with other ANS divisions to achieve these objective nonproliferation policies.
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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.”
Michael Epstein, Hans K. Fauske, Charles F. Askonas, Marc A. Vial, Patricia Paviet-Hartmann
Nuclear Technology | Volume 163 | Number 2 | August 2008 | Pages 294-306
Technical Paper | Reprocessing | doi.org/10.13182/NT08-A3989
Articles are hosted by Taylor and Francis Online.
Adiabatic calorimetry testing was performed to determine the Arrhenius relations for the chemical self-heat rates generated by the oxidation of tri-n-butyl phosphate saturated with nitric acid ("organic phase"). The adiabatic calorimetry tests showed that the runaway reaction is tempered at ~109°C when the organic phase rests on top of a layer of aqueous nitric acid ("aqueous phase"). It is believed that tempering in the laboratory-scale two-layer organic/aqueous system is mainly due to the upward transport of dissolved water from the aqueous phase to the organic phase where the water evaporates into rising reaction product gas bubbles. The rate of water transport depends strongly on the location and rate of product gas bubble generation. Isothermal tests were performed that clearly reveal that the reaction product gas bubbles originate in the underlying aqueous layer and that their rate of generation is bubbling enhanced reactant mass transfer controlled. A semiempirical expression for the rate of gas generation was developed from the measurements and from available correlations on enhanced mass transfer in bubbling pools. The empirical and semiempirical relations reported here for chemical self-heat rates and reaction product gas production are necessary to determine the thermal stability boundaries of single-layer and two-layer systems, predictions of which appear in the companion paper, "Thermal Stability and Safe Venting of the Tri-N-Butyl Phosphate-Nitric Acid-Water ("Red Oil") System - III: Predictions of Thermal Stability Boundaries and Required Vent Size," Nuclear Technology, Vol. 163, p. 307 (2008).