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An extension of diffusion theory for thermal neutrons near boundaries; Extension del campo de validez de la teoria de difusion para neutrones termico en las proximidades de bordes

Abstract

The distribution of thermal neutron flux has been measured inside and outside copper rods of several diameters, immersed in water. It has been found that these distributions can be calculated by means of elemental diffusion theory if the value of the coefficient of diffusion is changed. this parameter is truly a diffusion coefficient, which now also depends on the diameter of the rod. Through a model an expression of this coefficient is introduced which takes account of the measurements of the author and of those reported in PUGC P/928 (1995), ANL-5872 (1959), DEGR 319 (D) (1961). This model could be extended also to plane geometry. (Author) 19 refs.
Publication Date:
Jul 01, 1963
Product Type:
Technical Report
Report Number:
JEN-114
Subject:
22 GENERAL STUDIES OF NUCLEAR REACTORS; THERMAL NEUTRONS; THERMAL FISSION; CONTROL THEORY; DIFFUSION; NEUTRONS; RODS; GEOMETRY; IMPACT PARAMETER
OSTI ID:
21177947
Research Organizations:
Junta de Energia Nuclear (JEN), Madrid (Spain)
Country of Origin:
Spain
Language:
Spanish
Other Identifying Numbers:
TRN: ES09B0295
Availability:
Commercial reproduction prohibited; OSTI as DE21177947
Submitting Site:
SPN
Size:
64 pages
Announcement Date:
Jun 26, 2009

Citation Formats

Alvarez Rivas, J L. An extension of diffusion theory for thermal neutrons near boundaries; Extension del campo de validez de la teoria de difusion para neutrones termico en las proximidades de bordes. Spain: N. p., 1963. Web.
Alvarez Rivas, J L. An extension of diffusion theory for thermal neutrons near boundaries; Extension del campo de validez de la teoria de difusion para neutrones termico en las proximidades de bordes. Spain.
Alvarez Rivas, J L. 1963. "An extension of diffusion theory for thermal neutrons near boundaries; Extension del campo de validez de la teoria de difusion para neutrones termico en las proximidades de bordes." Spain.
@misc{etde_21177947,
title = {An extension of diffusion theory for thermal neutrons near boundaries; Extension del campo de validez de la teoria de difusion para neutrones termico en las proximidades de bordes}
author = {Alvarez Rivas, J L}
abstractNote = {The distribution of thermal neutron flux has been measured inside and outside copper rods of several diameters, immersed in water. It has been found that these distributions can be calculated by means of elemental diffusion theory if the value of the coefficient of diffusion is changed. this parameter is truly a diffusion coefficient, which now also depends on the diameter of the rod. Through a model an expression of this coefficient is introduced which takes account of the measurements of the author and of those reported in PUGC P/928 (1995), ANL-5872 (1959), DEGR 319 (D) (1961). This model could be extended also to plane geometry. (Author) 19 refs.}
place = {Spain}
year = {1963}
month = {Jul}
}