Published 1981 | Version v1
Miscellaneous Open

User manual of Quabox/Cubbox computer code

Creators

Description

The Quabox/Cubbox code solves the neutron diffusion equation in function of space and time, in two and three dimensions. The expansion method of neutron flux is based in the spatial flux of second, third and sixth ordem of local polynoms. Results with high acuraccy of flux spatial distribution are obtained even when a great smash is used. The integration of the equation is done using a steady technique of ADE-ADI matrix decomposition. This methods allow a efficient tridimensional evaluation of power

Availability note (English)

MF available from INIS under the Report Number.

Abstract (Portuguese)

O codigo Quabox/Cubbox resolve a equacao de difusao de neutrons dependente do espaco e do tempo, em coordenadas cartesianas em duas ou tres dimensoes. O metodo de expansao do fluxo de neutrons e baseadO na aproximacao espacial do fluxo por polinomios locais de 20, 30 ou 60 ordem. Resultados com alta precisao da distribuicao espacial do fluxo sao obtidos mesmo quando se usa uma malha grande. A integracao das equacoes dependentes do tempo e feita por uma tecnica estavel de decomposicao de matrizes ADE-ADI. Esses metodos implantados permitem um eficiente calculo tridimensional de potencia

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Additional details

Additional titles

Original title (Portuguese)
Manual de utilizacao do programa Quabox/Cubbox

Publishing Information

Imprint Pagination
86 p.
Report number
INIS-BR--1705

INIS

Country of Publication
Brazil
Country of Input or Organization
Brazil
INIS RN
20085653
Subject category
S22: GENERAL STUDIES OF NUCLEAR REACTORS; S99: GENERAL AND MISCELLANEOUS;
Descriptors DEI
C CODES; COMPUTER CALCULATIONS; NEUTRON DIFFUSION EQUATION; NEUTRON FLUX; Q CODES; THREE-DIMENSIONAL CALCULATIONS; TWO-DIMENSIONAL CALCULATIONS
Descriptors DEC
COMPUTER CODES; RADIATION FLUX