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Division Spotlight
Human Factors, Instrumentation & Controls
Improving task performance, system reliability, system and personnel safety, efficiency, and effectiveness are the division's main objectives. Its major areas of interest include task design, procedures, training, instrument and control layout and placement, stress control, anthropometrics, psychological input, and motivation.
Meeting Spotlight
International Conference on Mathematics and Computational Methods Applied to Nuclear Science and Engineering (M&C 2025)
April 27–30, 2025
Denver, CO|The Westin Denver Downtown
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
Argonne’s METL gears up to test more sodium fast reactor components
Argonne National Laboratory has successfully swapped out an aging cold trap in the sodium test loop called METL (Mechanisms Engineering Test Loop), the Department of Energy announced April 23. The upgrade is the first of its kind in the United States in more than 30 years, according to the DOE, and will help test components and operations for the sodium-cooled fast reactors being developed now.
J. Maisonneuve, T. Oda, S. Tanaka
Fusion Science and Technology | Volume 60 | Number 4 | November 2011 | Pages 1507-1510
Interaction with Materials | Proceedings of the Ninth International Conference on Tritium Science and Technology (Part 2) | doi.org/10.13182/FST11-A12718
Articles are hosted by Taylor and Francis Online.
The stability of hydrogen atoms trapped in vacancy clusters of a bcc iron structure is investigated by molecular statics calculations of the hydrogen binding energy to these clusters. The configurations having a minimum potential energy are obtained from the relaxation of a large number of different initial atomic configurations. Calculations of hydrogen binding energy to a mono-vacancy illustrate a relatively large gain of energy in trapping up to two hydrogen atoms in a monovacancy and the increasing difficulty to trap additional atoms due to hydrogen mutual repulsion. Comparison with ab-initio reference calculations of the hydrogen binding energy shows good agreement for up to three trapped hydrogen atoms. Based on the calculations conducted on the most stable vacancy-hydrogen complexes containing two to six vacancies, the maximum capacity of hydrogen atoms per vacancy was found to decrease with the size of vacancy cluster. The calculations of hydrogen binding energies to these clusters show that trapping two hydrogen atoms per vacancy is still a particularly favorable process for vacancy clusters.