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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 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.
M. V. Mataušek
Nuclear Science and Engineering | Volume 65 | Number 1 | January 1978 | Pages 161-164
Technical Note | doi.org/10.13182/NSE78-A27136
Articles are hosted by Taylor and Francis Online.
The previously reported work on the spherical harmonics treatment of epithermal-neutron spectra in reactor lattices is further extended and improved. The condensed matrix representation is introduced for the space- and lethargy-dependent vector of the spherical harmonics flux moments. Detailed recurrence relations for the factors resulting from numerical integration of the lethargy transfer integrals, in both the fast and the resonance regions, are provided. For solving systems of interface and boundary condition equations in the space variable, a procedure based on the coefficient matrix partitioning is presented.
