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Materials Science & Technology
The objectives of MSTD are: promote the advancement of materials science in Nuclear Science Technology; support the multidisciplines which constitute it; encourage research by providing a forum for the presentation, exchange, and documentation of relevant information; promote the interaction and communication among its members; and recognize and reward its members for significant contributions to the field of materials science in nuclear technology.
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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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Fusion Science and Technology
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.”
J. T. Gill, R. E. Ellefson, R. P. Paulick, C. M. Colvin, R. L. Yauger, E. E. Johns, R. L. Anderson, E. L. Lewis, P. H. Lamberger, R. E. Vallee
Fusion Science and Technology | Volume 14 | Number 2 | September 1988 | Pages 876-883
Tritium Properties and Interactions with Material | Proceedings of the Third Topical Meeting on Tritium Technology in Fission, Fusion and Isotopic Applications (Toronto, Ontario, Canada, May 1-6, 1988) | doi.org/10.13182/FST88-A25245
Articles are hosted by Taylor and Francis Online.
A recent tritium inventory imbalance at Mound required an investigation into its causes. Much tritium was found as HTO in unsuspected zeolite traps of a T-purification system. Isotopic exchange from ammonia was postulated as a mechanism for entry of T into the zeolitic water. Gases from a T-processing system which had experienced air in-leakage were shown, by trapping of condensibles, to contain substantial H-isotopic waters and ammonias. Further evidence for tritiated ammonia was inferred from changes in pressure and T purity in otherwise unperturbed tanks of N2 and (H/D/T)2. From two such tanks which held N2 and T2 at equilibrium, ammonia was trapped and decomposed; a preliminary equilibrium constant for N2 + 3T2 ⇔ 2NT3 was determined. Controlled experiments by laser Raman spectrometry are in progress to investigate N2/T2 equilibria and kinetics. Results for gas mixtures in the 60–130 kPa (500–1000 torr) range (per reactant) suggest that the forward rate and the equlibrium attained are α [T2]2 . G-values for NT3 production were ≈1–2 molecules atm-1 (T2) (100eV)-1. Self-decomposition of NT3 proceded in an exponential decay with a G = 15–30. A lower value was observed at pressures where β--absorption in the gas was poor.