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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 Standards Committee is responsible for the development and maintenance of voluntary consensus standards that address the design, analysis, and operation of components, systems, and facilities related to the application of nuclear science and technology. Find out What’s New, check out the Standards Store, or Get Involved today!
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Latest News
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.
J. Vetrovec
Fusion Science and Technology | Volume 8 | Number 1 | July 1985 | Pages 1235-1240
Impurity Control and Vacuum Technology | Proceedings of the Sixth Topical Meeting on the Technology of Fusion Energy (San Francisco, California, March 3-7, 1985) | doi.org/10.13182/FST85-A39936
Articles are hosted by Taylor and Francis Online.
The key parameter in calculating the pumping speed of cryopanels is the capture probability. This probability is usually determined by Monte Carlo methods simulating molecular transport of gas. While such methods can be very accurate, they are also rather costly and inflexible. An alternate approach is proposed which uses an analytical method that draws on analogy between radiative heat transfer and molecular gas flow. This analytical method will be described, and it will be shown how it was used to obtain first estimates of pumping speed for the cryopanels for the MFTF-B Neutral Beamlines. The directional dependence of pumping speed is discussed in detail. The results of the calculations are compared to both the Monte Carlo results and experimental data.
