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Conference Spotlight
Nuclear Energy Conference & Expo (NECX)
September 8–11, 2025
Atlanta, GA|Atlanta Marriott Marquis
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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.
W. F. Vogelsang
Nuclear Technology | Volume 15 | Number 3 | September 1972 | Pages 470-474
Technical Note | Reactor | doi.org/10.13182/NT72-A16045
Articles are hosted by Taylor and Francis Online.
A simple model is proposed to investigate the relations between breeding, inventory, and doubling time in the blanket of a fusion reactor using the T(D,n)He4 reaction. It is assumed that the amount of tritium removed per unit time is proportional to the amount present and the effects of radioactive decay are included. A series of numerical calculations was made using pa rameters appropriate for a 5000-MW(th) reactor. From these calculations it appears that to keep the blanket inventory and the initial inventory for startup to reason able values, the tritium removal system must be de signed to provide a mean tritium residence time in the blanket less than ∼1 day, preferably with the mean residence time approaching 0.1 day. Breeding ratios in the range of 1.02 to 1.1 give acceptable doubling times and, in general, higher breeding ratios are not desirable, especially when considered from a hazards viewpoint.