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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. Podowski
Nuclear Science and Engineering | Volume 72 | Number 2 | November 1979 | Pages 256-261
Technical Paper | doi.org/10.13182/NSE79-A19470
Articles are hosted by Taylor and Francis Online.
The question of general asymptotic stability is considered for N-order coupled-core reactors neglecting neutron coupling time lag, but with general nonlinear reactivity functionals. Stability criteria, applicable to models with reactivity coupling effects, are established. As an illustration of the general results, the linear reactivity feedback model is investigated. In particular, a two-node model with temperature coupling effects is discussed in more detail.
