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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.
Bin Han, Bryan Bednarz, Yaron Danon, Robert Block, X. George Xu
Nuclear Technology | Volume 168 | Number 2 | November 2009 | Pages 576-579
Shielding Materials | Special Issue on the 11th International Conference on Radiation Shielding and the 15th Topical Meeting of the Radiation Protection and Shielding Division (Part 2) / Radiation Measurements and Instrumentation | doi.org/10.13182/NT09-A9246
Articles are hosted by Taylor and Francis Online.
High-energy photons from medical accelerators are used to treat tumors in cancer patients. One consequence is the production of neutrons from photonuclear interactions in the high-Z accelerator components. The release and capture of neutrons produce radioactive nuclei that can irradiate patients and medical personnel. The goal of this study is to develop a method for quantifying the activation of accelerator components using MCNPX. To benchmark this method, we took activation measurements from the irradiation of a series of zinc plates using a 55-MeV electron beam and compared them with MCNPX calculations. The measured cumulative photon-induced activity from 68Zn(,p)67Cu interactions in all of the plates was 10.8 MBq, which is in 5.4% agreement with the calculated value of 10.2 ± 1.1 MBq. Based on these results, a series of simulations were performed in order to optimize the photon- and neutron-induced activity in tungsten for subsequent experiments. The radioactivity from activated short-lived isotopes and subsequent buildup can be significant from repeated accelerator operations during a day. The approach described in this paper is useful in quantifying the origin and the amount of nuclear activation and the buildup of radioactivity.
