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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.
Jarmo Kalilainen, Haeseong Kim, Abdel Dehbi, Terttaliisa Lind (PSI)
Proceedings | 2018 International Congress on Advances in Nuclear Power Plants (ICAPP 2018) | Charlotte, NC, April 8-11, 2018 | Pages 571-577
Particle depletion in an enclosure with turbulent natural convection was investigated using severe accident code MELCOR 2.1. A model of the experimental DIANA facility was created and the results of the simulation were compared against the experimental and LES data from earlier work. Three particle sizes 0.5 ?m, 1.0 ?m and 2.5 ?m were used in the study. The temperature difference between the vertical isothermal walls of the enclosure was varied between 40 K, 20 K and 10 K. The MELCOR model reproduced the stratified temperature field and the encircling natural convective flow in the cavity qualitatively. The deposition rate was well matched between the MELCOR and experimental data, but further analysis indicated that the thermophoresis was overestimated in the MELCOR modeling, thus compensating for the turbulent deposition, which was not considered in this MELCOR simulation work.
