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Division Spotlight
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.
Meeting Spotlight
Conference on Nuclear Training and Education: A Biennial International Forum (CONTE 2025)
February 3–6, 2025
Amelia Island, FL|Omni Amelia Island Resort
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
Christmas Night
Twas the night before Christmas when all through the houseNo electrons were flowing through even my mouse.
All devices were plugged in by the chimney with careWith the hope that St. Nikola Tesla would share.
Pengbo Zhang, Ruihuan Li, Chong Zhang, Jijun Zhao
Fusion Science and Technology | Volume 66 | Number 1 | July-August 2014 | Pages 106-111
Technical Paper | doi.org/10.13182/FST13-746
Articles are hosted by Taylor and Francis Online.
The preferential site, segregation and embrittlement properties of hydrogen (H) in a vanadium (V) &Sgr;3 (111) [110] grain boundary (GB) were investigated by first-principles calculations. The solution and segregation energy of H at different interstitial and substitutional sites are calculated. Energetically, H prefers to occupy the GB space rather than substitutional sites and can segregate to the GB with segregation energy of −0.08 eV. Hydrogen is an embrittler at the GB by producing an embrittlement energy of about 0.41 eV, in agreement with experimental observations. Charge density distributions indicate that there are no strong chemical bonds between an H atom and the adjacent V atoms in the GB, and the presence of H atom weakens the bond strength between surrounding V atoms.
