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Conference Spotlight
Nuclear Energy Conference & Expo (NECX)
September 8–11, 2025
Atlanta, GA|Atlanta Marriott Marquis
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Fusion Science and Technology
August 2025
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Industry Update—August 2025
Here is a recap of industry happenings from the recent past:
SMR service center targeted for Ontario
GE Vernova Hitachi Nuclear Energy has announced plans to invest as much as $50 million to establish a Canadian BWRX-300 Engineering and Service Center near Ontario Power Generation’s Darlington New Nuclear Project site. The Ontario government had previously approved the construction of the first of four BWRX-300 small modular reactors at the site. The center will provide engineering and technical services for the long-term operation and maintenance of the future fleet of SMRs in Ontario. It will also serve as a hub for innovation and training, knowledge sharing, supply chain engagement, and workforce development.
K. Ida, M. Yoshinuma, K. Tanaka, R. Sakamoto, S. Inagaki, LHD Experiment Group
Fusion Science and Technology | Volume 58 | Number 1 | July-August 2010 | Pages 150-159
Chapter 3. Confinement and Transport | Special Issue on Large Helical Device (LHD) | doi.org/10.13182/FST10-A10802
Articles are hosted by Taylor and Francis Online.
The interlinkage of particle, momentum, and heat transport in plasmas appears as a nondiffusive term of each transport equation. The physical mechanisms determining the diffusive and nondiffusive terms of particle, momentum, and heat transports are described. The nondiffusive term in the particle transport and impurity transport, which causes an inward pinch or outward flux, is driven by the temperature gradient and the magnetic field curvature. One significant piece of evidence of the nondiffusive term of particle transport is observed in the impurity transport as an impurity hole, where the impurity profiles become extremely hollow and the inward flow due to the density gradient is balanced with the outward flow driven by the ion temperature gradients. The outward convection of impurity observed contradicts the neoclassical prediction but is expected to contribute to the purity of plasma in the ion root even if the radial electric field is negative. The nondiffusive term in the momentum transport, which drives spontaneous toroidal rotation, is also observed in the plasmas in the Large Helical Device (LHD). The spontaneous rotations are driven by the electric field near the plasma edge and the ion temperature gradient at the midradius in the plasma. In the heat transport, no clear nondiffusive term is observed, and it is considered to be diffusive. The temperature and temperature gradient dependences of the diffusive terms are studied with the perturbation transport study and the slow transition between two transport branches that have a weak and a strong temperature dependence of thermal diffusivity.