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Sugie, Tatsuo; Hatae, Takaki; Koide, Yoshihiko; Fujita, Takaaki; Kusama, Yoshinori; Nishitani, Takeo; Isayama, Akihiko; Sato, Masayasu; Shinohara, Koji; Asakura, Nobuyuki; et al.
Fusion Science and Technology (JT-60 Special Issue), 42(2-3), p.482 - 511, 2002/09
Times Cited Count:6 Percentile:3.03(Nuclear Science & Technology)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 has been 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, the 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.
Onizawa, Toshikazu; Hoshino, Masato; Nemoto, Hidenori; Akiyama, Kazuki
no journal, ,
Low level liquid waste generated from reprocessing of spent nuclear fuel in the Tokai Reprocessing Plant solidified with bitumen from 1982 to 1997. About 30,000 of bituminized wastes were produced, and stored in the storage facility. Recently, the leakage phenomenon due to the corrosion of bituminized waste drum occurred in the other nuclear facility. Based on the malfunction event, we have advanced the development of observation device for grasping soundness of the bituminized waste drums stored in the storage facility. This paper is reported about our effort to develop a remote observation device of the bituminized waste drums stored in the storage facility and the observation results with the developed device.