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Fusion Science and Technology
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.
Ichiro Yamamoto, Susumu Hatta, Akira Kanagawa
Fusion Science and Technology | Volume 21 | Number 2 | March 1992 | Pages 977-982
Material; Storage and Processing | doi.org/10.13182/FST92-A29878
Articles are hosted by Taylor and Francis Online.
The present paper analyzes the separative performance of a “cryogenic-wall” thermal diffusion column of which the cold-wall temperature is lower than 77.35 K. Because the value of thermal diffusion factor αT for H2-HT mixture decreases in lower temperature region and is probably negative under ∼70 K, an estimated enhancement of the separation factor is not so large: the total separation factor (αβ)max of the column with rh = 0.015 cm, rc = 1.5 cm, Z = 150 cm and ΔT = 1200 K increases from ∼3.3×103( Tc = 77.35 K, Popt = ∼0.04 MPa) to ∼6.0×103( Tc = 30 K, Popt = ∼0.027 MPa) when the column is operated under the feed rate of 10 cm3(converted to the value of 0.1 MPa and 288.15 K)/min and the cut θ is 0.1.