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Fusion Science and Technology
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NRC looks to leverage previous approvals for large LWRs
During this time of resurging interest in nuclear power, many conversations have centered on one fundamental problem: Electricity is needed now, but nuclear projects (in recent decades) have taken many years to get permitted and built.
In the past few years, a bevy of new strategies have been pursued to fix this problem. Workforce programs that seek to laterally transition skilled people from other industries, plans to reuse the transmission infrastructure at shuttered coal sites, efforts to restart plants like Palisades or Duane Arnold, new reactor designs that build on the legacy of research done in the early days of atomic power—all of these plans share a common throughline: leveraging work already done instead of starting over from square one to get new plants designed and built.
H. Funaba, K. Y. Watanabe, S. Sakakibara, S. Murakami, I. Yamada, K. Narihara, K. Tanaka, T. Tokuzawa, M. Osakabe, Y. Narushima, M. Yokoyama, S. Ohdachi, Y. Takeiri, H. Yamada, K. Kawahata, LHD Experiment Group
Fusion Science and Technology | Volume 58 | Number 1 | July-August 2010 | Pages 141-149
Chapter 3. Confinement and Transport | Special Issue on Large Helical Device (LHD) | doi.org/10.13182/FST10-A10801
Articles are hosted by Taylor and Francis Online.
The magnetic configuration of the Large Helical Device (LHD) changes with the increment in beta. To distinguish between the beta effect and the configuration effect on the gradual degradation of the global confinement property in the high-beta LHD plasmas, the local transport characteristics are studied by considering the change in the major radius of the magnetic flux surface with the beta value. A model transport coefficient that has the same nondimensional parameter dependence as the international stellarator scaling 2004 (ISS04) is introduced and used as the reference. The dependence of the local transport characteristics in high-beta plasmas on the major radial position of a geometric center of the magnetic flux surface is compared with that in low-beta plasmas. The dependence of the local transport in the peripheral region is correlated more with beta itself than the magnetic configuration effect, whereas the core transport appears to be correlated more with the configuration effect. The comparison of the experimental transport coefficients and the calculation results shows that the resistive pressure gradient-driven turbulence can be considered as one of the causes of this degradation.