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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. Kobayashi, T. Shimizu, Y. Seki
Fusion Science and Technology | Volume 15 | Number 2 | March 1989 | Pages 1008-1012
Safety And Environment — II | doi.org/10.13182/FST89-A39825
Articles are hosted by Taylor and Francis Online.
If a loss-of-coolant accident occurs in a fusion reactor, the temperature in the vacuum vessel will rise. If the decay heat is not removed, then the plasma vacuum boundary may melt. In this paper, the effects of the decay heat in a LOCA are analysed numerically based on the Fusion Experimental Reactor (FER). ... the fusion power: ∼ 460 MW. In the case of a loss-of-coolant accident with the plasma shut down, it is assumed that the decay heat is removed by the radiation of the divertor only. If the radiant effect is a quarter of the black radiation, the divertor plate will not melt, because the temperature rise is less than 150 K. Secondly, it is assumed that the decay heat is removed by the radiation between the outer shield and the heat shield. When the initial shield temperature is low and the amount of the shield is large, the temperature rise is negligible, because the heat capacity is large enough to absorb the heat. The effect of the natural convection outside of the cryostat is negligible to remove the heat.