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Fusion Science and Technology
August 2025
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DOE fast tracks test reactor projects: What to know
The Department of Energy today unveiled 10 companies racing to bring test reactors online by next year to meet Trump's deadline of next Independance Day, leveraging a new DOE pathway that allows reactor authorization outside national labs. As first outlined in one of the four executive orders on nuclear energy released by President Trump on May 23 and in the request for applications for the Reactor Pilot Program released June 18, the companies must use their own money and sites—and DOE authorization—to get reactors operating. What they won’t need is a Nuclear Regulatory Commission license.
T. Sugie, T. Hatae, Y. Koide, T. Fujita, Y. Kusama, T. Nishitani, A. Isayama, M. Sato, K. Shinohara, N. Asakura, S. Konoshima, H. Kubo, H. Takenaga, Y. Kawano, T. Kondoh, A. Nagashima, T. Fukuda, H. Sunaoshi, O. Naito, S. Kitamura, Y. Tsukahara, A. Sakasai, Y. Sakamoto, T. Suzuki, K. Tobita, M. Nemoto, A. Morioka, M. Ishikawa, S. Ishida, N. Isei, N. Oyama, Y. Neyatani, K. Itami, S. Sakurai, H. Tamai, K. Tsuchiya, S. Higashijima, T. Nakano, S. Nagaya, S. Chiba, S. Lee, M. Shitomi
Fusion Science and Technology | Volume 42 | Number 2 | September-November 2002 | Pages 482-511
Technical Paper | doi.org/10.13182/FST02-A242
Articles are hosted by Taylor and Francis Online.
The diagnostic system of JT-60U (JT-60upgrade) is composed of about 50 individual diagnostic devices. Recently, the detailed radial profile measurements of plasma parameters have been improved, so that the internal structure of plasmas could be explored. The understanding of plasma confinement has been enhanced by density and temperature fluctuation measurements using a mm-wave reflectometer and electron cyclotron emission measurements, respectively. In addition, real-time control experiments of electron density, neutron yield, radiated power, and electron temperature gradient have been carried out successfully by corresponding diagnostic devices. These measurements and the real-time control contribute to improving plasma performance. Diagnostic devices for next generation fusion devices such as a CO2 laser interferometer/polarimeter and a CO2 laser collective Thomson scattering system have been developed.
