Published 1983 | Version v1
Miscellaneous Metadata-only

Feedback static model for neutronic and thermalhydraulic simulation of fast reactors

Creators

  • 1. Instituto de Engenharia Nuclear, Rio de Janeiro (Brazil)

Description

From the simplified model of the reference state of the Super Phenix, the feedback process to correct the microscopic cross sections with the reactor state is analyzed. Two dominant terms are considered in this process: the Doppler effect and the spectral effect. Spatial and cellulars calculations with 1DX and Hetaire code, aiming to determine the coefficients of Doppler effect and Spectral C1 e C2, respectivity. It was verified that the spectral contribution in the variation of the cross sections with the temperature is 12%, that means a great contamination in the Doppler effect. (E.G.)

Abstract (Portuguese)

A partir do estado de referencia do modelo simplificado do reator SUPER PHENIX, analisamos o processo de realimentacao para a correcao das secoes de choque microscopicas com o estado do reator. Consideramos dois termos dominantes neste processo, que sao: o efeito Doppler e o efeito espectral. Para isso, foram feitos calculos espaciais e celulares com os codigos 1DX e HETAIRE, a fim de determinar os coeficientes dos efeitos Doppler e espectral, C1 e C2 respectivamente. Verificou-se que a contribuicao espectral na variacao da secao de choque com a temperatura e de 12%, o que representa uma significante contaminacao no efeito Doppler. (Autor)

Additional details

Additional titles

Original title (Portuguese)
Modelo de realimentacao estatico para simulacao neutronica e termohidraulica de reatores rapidos

Publishing Information

Imprint Title
Proceedings of the 4. Brazilian Meeting on Reactor Physics
Imprint Pagination
469 p.
Journal Page Range
p. 216-229(ST3-F).
Report number
INIS-BR--260

Conference

Title
4. Brazilian Meeting on Reactor Physics.
Dates
3-5 Nov 1983.
Place
Itaipava, RJ (Brazil).

INIS

Country of Publication
Brazil
Country of Input or Organization
Brazil
INIS RN
16027426
Subject category
S21: SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS;
Resource subtype / Literary indicator
Conference
Descriptors DEI
COMPUTER CALCULATIONS; COMPUTERIZED SIMULATION; CROSS SECTIONS; DOPPLER EFFECT; FAST REACTORS; FLUID FLOW; H CODES; HEAT TRANSFER; NUMBER CODES; TEMPERATURE DEPENDENCE
Descriptors DEC
COMPUTER CODES; ENERGY TRANSFER; EPITHERMAL REACTORS; REACTORS; SIMULATION

Optional Information

Notes
Imprint:Anais do 4. Encontro Nacional de Fisica de Reatores.