The spectral indices of the IPEN/MB-01 reactor: measurements and calculation
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2002
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INTERNATIONAL CONFERENCE ON THE NEW FRONTIERS OF NUCLEAR TECHNOLOGY: REACTOR PHYSICS, SAFETY AND HIGH-PERFORMANCE COMPUTING
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This experimental work aims to obtain the spectral indices 28p, 25δ , C*, C8/F and (C8/F)epith of the
core of the 1PEN/MB-01 nuclear reactor. The measurements were performed with high precision at
the asymptotic central core region. Specifically for 28p and 25δ, this work adopts a novice approach
based on the direct gamma spectrometry of the irradiated fuel rods and the traditional one based on
uranium foils. The total and epithermal reaction rates were obtained from the direct gamma
spectrometry of an irradiated fuel element at the maximum neutron flux position. The gamma
spectrometry was performed by a fuel rod scanning equipment with a collimator of 1 cm opening size.
Correction factors for the cadmium perturbations were obtained both experimentally and from a
calculational approach carried out by MCNP-4B. Furthermore, this work also introduces a new
spectral index namely (C8/F)epith for verifying the adequacy of the nuclear data at the epithermal
neutron energy region. The analyses reveal that the correction factors are very sensitive to the nuclear
data library used by MCNP-4B; namely ENDF/B-V and ENDF/B-VI.5 libraries. The best results are
obtained when the correction factors and the spectral indices are calculated with ENDF/B-VI.5.
Como referenciar
BITELLI, U.D.; SANTOS, A. The spectral indices of the IPEN/MB-01 reactor: measurements and calculation. In: INTERNATIONAL CONFERENCE ON THE NEW FRONTIERS OF NUCLEAR TECHNOLOGY: REACTOR PHYSICS, SAFETY AND HIGH-PERFORMANCE COMPUTING, Oct. 7-10, 2002, Seoul, Korea. Proceedings... Disponível em: http://repositorio.ipen.br/handle/123456789/16917. Acesso em: 30 Dec 2025.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.