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Nuclear Energy Conference & Expo (NECX)
September 8–11, 2025
Atlanta, GA|Atlanta Marriott Marquis
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Latest News
ANS joins others in seeking to discuss SNF/HLW impasse
The American Nuclear Society joined seven other organizations to send a letter to Energy Secretary Christopher Wright on July 8, asking to meet with him to discuss “the restoration of a highly functioning program to meet DOE’s legal responsibility to manage and dispose of the nation’s commercial and legacy defense spent nuclear fuel (SNF) and high-level radioactive waste (HLW).”
Dmitriy Vasilkov, Stanislav Grebenshchikov, Irina Grishina, Vyacheslav Ivanov, Nikolay Kharchev, Alexey Meshcheryakov, Vladimir Stepakhin
Fusion Science and Technology | Volume 80 | Number 7 | October 2024 | Pages 826-832
Research Article | doi.org/10.1080/15361055.2023.2201165
Articles are hosted by Taylor and Francis Online.
The results of experiments on high-temperature plasma confinement in a quasi-stationary fusion facility are presented. The results were obtained on the L-2M stellarator in which superposition of magnetic fields with three-dimensional spatial symmetry is created with the help of external windings. The plasma was created and heated using microwave pulses with a record specific power of 2 to 4 MW/m3. Under these conditions, spontaneous transition processes were observed in a plasma stable with respect to large-scale instabilities, leading to an abrupt increase in energy. High thermal loads on the wall of the vacuum chamber are observed in the area of the helical separatrix, which leads to an increase in the penetration of impurities into the plasma. Plasma energy and confinement time correspond to L-2M single-machine scaling at lower powers while at specific powers above 3 MW/m3, confinement time decreases due to the accumulation of impurities. The research results can be used to develop fusion energy facilities or to simulate astrophysical phenomena.