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The Description of Particle Transport Problems with Helical Symmetry

Edward W. Larsen

Nuclear Science and Engineering / Volume 156 / Number 1 / Pages 68-73

May 2007

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We show that three-dimensional (3-D) particle transport (or diffusion) problems having helical symmetry can be described by a transport (or diffusion) equation possessing only two independent spatial variables. The new two-dimensional (2-D) equations are closely related to the 2-D (r,) equations. These results will provide (a) more efficient computer simulations of 3-D transport and diffusion problems with helical symmetry, and (b) a useful technique for validating 3-D transport and diffusion codes.

 
 
 
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