On the use of the average chord length

被引：7
|
作者：
Sanchez, R [1 ]
机构：
[1] CEA, Serv Etud Reacteurs & Modelisat Avancee, Direct Energie Nucl, Commissariat Energie Atom, Saclay, France
来源：
ANNALS OF NUCLEAR ENERGY | 2004年 / 31卷 / 18期
关键词：
D O I：
10.1016/j.anucene.2004.04.007
中图分类号：
TL [原子能技术]; O571 [原子核物理学];
学科分类号：
0827 ; 082701 ;
摘要：
The average chord length has been traditionally used in reactor physics for the estimation of escape probabilities for bodies of small optical size and in elementary formulas in shelf-shilding analysis. In this work, the role of the average chord length in the estimation of transmission probabilities of homogeneous bodies is analyzed and the correct chord length distribution is derived from the incoming angular flux distribution. The concept of average projection area is used to derive a generalization of Dirac's original formula to the case of an angular flux uniformly entering a non-convex body. (C) 2004 Elsevier Ltd. All rights reserved.
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页码：2211 / 2216
页数：6
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