scholarly journals 2DB: A TWO DIMENSIONAL DIFFUSION-BURNUP CODE FOR FAST REACTOR ANALYSIS.

1968 ◽  
Author(s):  
W.W. Jr. Little ◽  
R.W. Hardie
Keyword(s):  
Fast Reactor ◽  
Two Dimensional ◽  
Dimensional Diffusion

Comparison of calculations of a two-dimensional model of a fast reactor

1980 ◽  
Vol 48 (6) ◽  
pp. 353-356 ◽  
Author(s):  
A. I. Voropaev ◽  
O. P. Chukhlova ◽  
A. A. Van'kov ◽  
L. N. Kudryashov ◽  
R. V. Nikol'skii
Keyword(s):  
Fast Reactor ◽  
Two Dimensional ◽  
Dimensional Model ◽  
Two Dimensional Model

Asymptotic analysis of some two-dimensional diffusion problems

1995 ◽  
Vol 448 (1933) ◽  
pp. 213-236 ◽  
Keyword(s):  
Linear Problem ◽  
Vacancy Concentration ◽  
Surface Concentration ◽  
Two Dimensional ◽  
Surface Source ◽  
Dimensional Diffusion ◽  
Equilibrium Vacancy ◽  
Equilibrium Vacancy Concentration ◽  
Dimensional Surface ◽  
Diffusion Problems

In this paper we discuss two-dimensional surface source and implant problems for a substitutional-interstitial diffusion model. We present asymptotic solutions in the limit of the surface concentration of impurity (or peak concentration of the implant) being far greater than the equilibrium vacancy concentration. Using leading order composite solutions we plot contours of constant impurity concentration. Some of these contours differ markedly from those of the corresponding linear problem, having the ‘bird’s beak’ shape which is frequently observed in experiments. We also discuss a two-dimensional surface source problem for a va­cancy model.

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