A new formulation of the pseudocontinuous synthesis algorithm applied to the calculation of neutronic flux in PWR reactors
Description
A new formulation of the pseudocontinuous synthesis algorithm is applied to solve the static three dimensional two-group diffusion equations. The new method avoids ambiguities regarding interface conditions, which are inherent to the differential formulation, by resorting to the finite difference version of the differential equations involved. A considerable number of input/output options, possible core configurations and control rod positioning are implemented resulting in a very flexible as well as economical code to compute 3D fluxes, power density and reactivities of PWR reactors with partial inserted control rods. The performance of this new code is checked against the IAEA 3D Benchmark problem and results show that SINT3D yields comparable accuracy with much less computing time and memory required than in conventional 3D finite differerence codes. (Author)
Availability note (English)
MF available from INIS under the Report Number.Abstract (Portuguese)
Uma nove formulacao de um algoritmo de sintese pseudocontinua e utilizada para resolver equacoes de difusao estaticas tri-dimensional a dois grupos de energia. O novo metodo evita ambiguidades relacionadas as condicoes de interface, inerentes a formulacao diferencial, utilizando uma versao de diferencas finitas das equacoes diferenciais envolvidas. Foram implantadas varias opcoes de entrada e saida de dados, possiveis configuracoes do nucleo e posicionamento das barras de controle, resultando assim num codigo muito flexivel e economico para a determinacao do fluxo neutronico tridimensional, densidade de potencia e reatividade de reatores PWR com barras de controle parcialmente inseridas. O desempenho deste novo codigo foi testada atraves do problema 'Benchmark - 3D IAEA' e os resultados mostraram que o SINT3D tem precisao comparavel com a de codigos de diferencas finitas 3D requerendo menos tempo e memoria de computador. (Autor)Files
12632821.pdf
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Additional details
Additional titles
- Original title (Portuguese)
- Implantacao de um novo algoritmo de sintese pseudocontinua para calculo de fluxo neutronico em reatores PWR
Publishing Information
- Imprint Pagination
- 204 p.
- Report number
- INIS-mf--6675
INIS
- Country of Publication
- Brazil
- Country of Input or Organization
- Brazil
- INIS RN
- 12632821
- Subject category
- S22: GENERAL STUDIES OF NUCLEAR REACTORS; S21: SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS;
- Resource subtype / Literary indicator
- Thesis
- Descriptors DEI
- ALGORITHMS; BENCHMARKS; FINITE DIFFERENCE METHOD; MULTIGROUP THEORY; NEUTRON DIFFUSION EQUATION; NEUTRON FLUX; PWR TYPE REACTORS; S CODES
- Descriptors DEC
- COMPUTER CODES; ITERATIVE METHODS; NUMERICAL SOLUTION; RADIATION FLUX; REACTORS; TRANSPORT THEORY; WATER COOLED REACTORS; WATER MODERATED REACTORS