Published October 1989 | Version v1
Report Open

Utilization of transmission probabilities in the calculation of unit-cell by the interface-current method

Creators

Description

A widely used but otherwise physically incorrect assumption in unit-cell calculations by the method of interface currents in cylindrical or spherical geometries, is that of that of isotropic fluxes at the surfaces of the cell annular regions, when computing transmission probabilities. In this work, new interface-current relations are developed without making use of this assumption and the effects on calculated integral parameters are shown for an idealized unit-cell example. (author)

Availability note (English)

MF available from INIS under the Report Number.

Abstract (Portuguese)

Uma hipotese amplamente utilizada e fisicamente incorreta em calculos de celulas cilindricas ou esfericas pelo metodo das correntes de interface, e a de fluxos isotropicos nas superficies das regioes em que se subdivide a celula, na obtencao das probabilidades de transmissao. Neste trabalho sao desenvolvidas novas relacoes entre as correntes de interface resultantes da suspensao dessa hipotese e avaliados os efeitos em parametros integrais de uma exemplo idealizado de celula unitaria. (autor)

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Additional details

Additional titles

Original title (Portuguese)
Utilizacao de probabilidades de transmissao aperfeicoadas no calculo de celulas unitarias pelo metodo das correntes de interface

Publishing Information

Imprint Pagination
22 p.
Report number
CTA-IEAv-RP--041/89

INIS

Country of Publication
Brazil
Country of Input or Organization
Brazil
INIS RN
21040384
Subject category
S22: GENERAL STUDIES OF NUCLEAR REACTORS; S21: SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS;
Descriptors DEI
B CODES; CYLINDRICAL CONFIGURATION; NEUTRON FLUX; REACTOR CELLS
Descriptors DEC
COMPUTER CODES; CONFIGURATION; RADIATION FLUX