Diffusion of Radon Gas from Uranium Mill Tailings

[+] Author and Article Information
W. F. Phillips, D. A. Bell

Department of Mechanical Engineering, Utah State University, Logan, Utah 84322

J. Energy Resour. Technol 104(2), 130-133 (Jun 01, 1982) (4 pages) doi:10.1115/1.3230389 History: Received August 03, 1981; Revised January 30, 1982; Online October 22, 2009


A finite element model is presented which predicts radon diffusion in an n layer composite. The basis functions are obtained from an exact solution to the differential equation for a homogeneous layer. Thus the model gives the exact solution for n homogeneous layers and, by using many small layers, will give good results for any nonhomogeneous composite. The model can account for diffusion into the soil below the tailings, a finite radon concentration in the ambient and a radon source in each layer and the underlying base soil. In addition to the general matrix equation, closed form solutions are presented for some important special cases.

Copyright © 1982 by ASME
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