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Conference Spotlight
Nuclear Energy Conference & Expo (NECX)
September 8–11, 2025
Atlanta, GA|Atlanta Marriott Marquis
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The Standards Committee is responsible for the development and maintenance of voluntary consensus standards that address the design, analysis, and operation of components, systems, and facilities related to the application of nuclear science and technology. Find out What’s New, check out the Standards Store, or Get Involved today!
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Fusion Science and Technology
Latest News
The RAIN scale: A good intention that falls short
Radiation protection specialists agree that clear communication of radiation risks remains a vexing challenge that cannot be solved solely by finding new ways to convey technical information.
Earlier this year, an article in Nuclear News described a new radiation risk communication tool, known as the Radiation Index, or, RAIN (“Let it RAIN: A new approach to radiation communication,” NN, Jan. 2025, p. 36). The authors of the article created the RAIN scale to improve radiation risk communication to the general public who are not well-versed in important aspects of radiation exposures, including radiation dose quantities, units, and values; associated health consequences; and the benefits derived from radiation exposures.
Kiyohiko Nishimura, Keisuke Matsuoka, Masami Fujiwara, Kozo Yamazaki, Jiro Todoroki, Tetsuo Kamimura, Tsuneo Amano, Heiji Sanuki, Shoichi Okamura, Minoru Hosokawa, Hiroshi Yamada, Shugo Tanahashi, Shin Kubo, Yasuyuki Takita, Tatsuo Shoji, Osamu Kaneko, Harukazu Iguchi, Chihiro Takahashi
Fusion Science and Technology | Volume 17 | Number 1 | January 1990 | Pages 86-100
Technical Paper | Stellarator System | doi.org/10.13182/FST90-A29173
Articles are hosted by Taylor and Francis Online.
The Compact Helical System was designed for research on transport in a low-aspect-ratio helical system. The machine parameters were chosen on the basis of a physics optimization study. Considerable effort was devoted to reducing error fields from current feeds and crossovers. The final machine parameters are as follows: major radius of 1 m; minor radius of the helical field coil of 0.313 m; plasma aspect ratio Ap = 5; pole number and toroidal period number of the helical field coil of l = 2 and m = 8, respectively; and helical pitch modulation of α = 0.3.
