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Nuclear Energy Conference & Expo (NECX)
September 8–11, 2025
Atlanta, GA|Atlanta Marriott Marquis
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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.
Joel H. Ferziger, Alan H. Robinson
Nuclear Science and Engineering | Volume 21 | Number 3 | March 1965 | Pages 382-389
Technical Paper | doi.org/10.13182/NSE65-A20041
Articles are hosted by Taylor and Francis Online.
The disadvantage factor of a two-region slab lattice has been calculated using Case's formalism in one-velocity transport theory. Although the problem has not been solved exactly, the Fredholm equations for the expansion coefficients which are derived converge extremely rapidly under iteration. For the numerical calculations, an IBM-7090 code based on the results has been written; the disadvantage factor can be calculated with this code in two seconds. The problem treated in this paper is highly idealized, but Case's formalism admits extensions and may lead to efficient means of calculating disadvantage factors for more realistic models; some of the extensions will be given in a later paper.
