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Division Spotlight
Operations & Power
Members focus on the dissemination of knowledge and information in the area of power reactors with particular application to the production of electric power and process heat. The division sponsors meetings on the coverage of applied nuclear science and engineering as related to power plants, non-power reactors, and other nuclear facilities. It encourages and assists with the dissemination of knowledge pertinent to the safe and efficient operation of nuclear facilities through professional staff development, information exchange, and supporting the generation of viable solutions to current issues.
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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Nuclear Science and Engineering
June 2025
Nuclear Technology
Fusion Science and Technology
May 2025
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.
Takuya Nagasaka, Martin L. Grossbeck, Takeo Muroga, James F. King
Fusion Science and Technology | Volume 39 | Number 2 | March 2001 | Pages 664-668
Fusion Materials | doi.org/10.13182/FST01-A11963315
Articles are hosted by Taylor and Francis Online.
Charpy impact tests of Japanese and US reference V-4Cr-4Ti alloys, NIFS-HEAT-1 (180 wppm oxygen) and US832665 (310 wppm Oxygen), were examined after gas-tungsten-arc (GTA) welding in a purified argon atmosphere. To investigate the effects of further reduction of oxygen level in the fusion zone, filler wires made of HP (high-purity V-4Cr-4Ti, 36 wppm oxygen) were used as well as those made of the reference alloys. Charpy impact property of NIFS-HEAT-1 in as-GTA-welded condition was superior to that of US832665. Use of the high-purity filler wires improved the impact property further. Good correlation was obtained between ductile-brittle-transition temperature (DBTT) and the oxygen level in the fusion zone. Since oxygen contamination from the atmosphere is avoidable by controlling its impurity level, oxygen reduction in weld materials, such as plate and wire, is crucial to obtain good weldability. Only contamination element detected in this study was hydrogen. Contamination occurred not only in fusion zone but also in base metal. Degassing of hydrogen after the welding may improve the impact property further.
