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Nuclear Criticality Safety
NCSD provides communication among nuclear criticality safety professionals through the development of standards, the evolution of training methods and materials, the presentation of technical data and procedures, and the creation of specialty publications. In these ways, the division furthers the exchange of technical information on nuclear criticality safety with the ultimate goal of promoting the safe handling of fissionable materials outside reactors.
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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.”
W.M. Shu, K. Okuno, Y. Hayashi, S. Ohira, Y. Naruse
Fusion Science and Technology | Volume 21 | Number 3 | May 1992 | Pages 1934-1938
Material and Tritium | doi.org/10.13182/FST92-A30002
Articles are hosted by Taylor and Francis Online.
Ion implantation driven permeation (IDP) behavior on pure molybdenum has been investigated using deuterium ion with low energy (200–2000 eV). The experimental results include measurements of the dependence of the permeation rate at the steady state upon the incident ion flux, temperature and incident ion energy. A good linear relationship was observed between the permeation rate and the incident ion flux. This suggests that the IDP process through pure molybdenum was controlled by diffusion of deuterium in both the front and back regions. The temperature dependence of the permeation rate varies with the incident ion energy. It is caused by the different mechanism of diffusion of the hydrogen isotope in the front region due to the trapping effect for incident ion energy ranging from 1.5 to 2 keV, or the formation of a short diffusion path (H-SIA) for incident ion energy ranging from 200 to 500 eV.