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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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Latest News
Ontario eyes new nuclear development
A 1,300-acre site left undeveloped on the shores of Lake Ontario four decades ago could see new life as the home to a large nuclear facility.
Shanwen Zhang, Yuntao Song, Zhongwei Wang, Xuebing Peng, Jianfeng Zhang, Yongfa Qin, Linlin Tang, Qiang He
Fusion Science and Technology | Volume 73 | Number 1 | January 2018 | Pages 43-49
Technical Note | doi.org/10.1080/15361055.2017.1368334
Articles are hosted by Taylor and Francis Online.
The Wendelstein 7-X (W7-X), the largest modular stellarator in the world, is in operation at Max Planck Institute for Plasma Physics in Greifswald, Germany. The magnet system of the W7-X consists of 50 nonplanar and 20 planar superconducting coils, which are supported by a massive central support structure. All superconducting coils have been subjected to gravity and electromagnetic force due to the interaction between self-field and the coil current in the test conditions in Saclay, France. Each coil is equipped with a few mechanical sensors. Some of the sensors have indicated considerable deviation from the numerical prediction. The nonplanar coil Type 1 is an example of such deviations. This technical note presents structural analyses performed to verify the numerical modeling by checking the stresses in the measurement points. In order to find the reason from the finite element model, three factors are considered: mesh refinement, increasing the region of mesh refinement, and changing the element supports. The results show that the three factors have no impact on the stresses at the measurement points. Finally, special attention has been paid to the sensors during commissioning of the W7-X, which revealed that lack of information about boundary conditions or temperature fluctuations could be the reason for the original discrepancies.