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Radiation Protection & Shielding
The Radiation Protection and Shielding Division is developing and promoting radiation protection and shielding aspects of nuclear science and technology — including interaction of nuclear radiation with materials and biological systems, instruments and techniques for the measurement of nuclear radiation fields, and radiation shield design and evaluation.
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2024 ANS Winter Conference and Expo
November 17–21, 2024
Orlando, FL|Renaissance Orlando at SeaWorld
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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
TEPCO launches English-language fuel debris portal website
Tokyo Electric Power Company has added an English-language version of its Fuel Debris Portal Site to its website. According to the company, the portal is intended to deliver information pertaining to melted nuclear fuel debris at the Fukushima Daiichi site to the public in an easy-to-understand manner.
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.