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Nuclear Energy Conference & Expo (NECX)
September 8–11, 2025
Atlanta, GA|Atlanta Marriott Marquis
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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.
S. K. Combs, L. R. Baylor, D. T. Fehling, P. W. Fisher, C. R. Foust, D. A. Rasmussen, J. B. Wilgen, B. E. Chapman, S. P. Oliva, S. C. Prager, J. S. Sarff, M. D. Wyman, D. L. Brower, W. X. Ding, S. D. Terry, B. H. Deng
Fusion Science and Technology | Volume 44 | Number 2 | September 2003 | Pages 513-517
Technical Paper | Fusion Energy - Plasma Engineering, Heating, and Current Drive | doi.org/10.13182/FST03-A388
Articles are hosted by Taylor and Francis Online.
A compact pellet injection system that was recently developed at the Oak Ridge National Laboratory has been installed on the Madison Symmetric Torus (MST) at the University of Wisconsin and used in initial plasma fueling experiments. The system, referred to as a "pellet injector in a suitcase," is a pipe gun device with a four-barrel capability (presently equipped with two 1.0-mm-bore barrels), and it uses a cryogenic refrigerator for in-situ hydrogen pellet formation (typically, D2 pellets). This new, portable, stand-alone pellet injection system was developed to provide a flexible means of plasma fueling on a wide variety of magnetic confinement devices, with relatively low costs for installation and operation. The injector has already been used to produce useful results with pellets on MST plasmas, including significant and rapid increases (almost 100%) in the line average density, and effectively depositing fuel in the plasma core (central densities of [approximately equal to] 1.4 × 1019 m-3). In this paper, the injection system, its performance, and reliability will be described, and results from some initial MST pellet experiments will be highlighted.