k0-Instrumental Neutron Activation Analysis Establishment at CDTN, Brazil: A successful story

Menezes, Maria Ângela de B. C.; Sabino, Claudia de Vilhena Schayer; Franco, Mílton Batista; Kastner, Geraldo Frederico; Rossi, Enrico

doi:10.1023/a:1026104613854

Cited by 29 publications

(16 citation statements)

References 3 publications

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“…The neutron fluence rate was simulated calculating in the angled neutron extractor (5 cm diameter), in an earlier study [6]. Considering that the reactor IPR-R1 operates routinely for 8 hours, 28,000 s, it was necessary to make the same evaluation in a neutron extractor with a larger diameter (10 cm) to increase the neutron fluence rate in order to reach better precision and lower detection limits [8].…”

Section: Neutron Fluence Rate In the Angled Neutron Extractormentioning

confidence: 99%

Monte Carlo Simulations for a Preliminary Design of TRIGA IPR-R1 PGAA Facility

Guerra¹,

Leal²,

Pereira³

et al. 2016

JCCE

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Abstract:In this paper, the evaluation of a preliminary design of a PGAA (prompt gamma activation analysis) facility based on Monte Carlo simulations is presented and discussed. The implementation of the PGAA method at the CDTN (nuclear technology development centre) would increase the applications of the TRIGA reactor. The preliminary design is based on a quasi vertical hollow cylinder (called neutron extractor) in the reactor pool to extract the neutron flux. This study evaluates the neutron flux in the upper position of the cylinder in the suggested position of the samples to be analyzed by the PGAA. The calculations of the radioactive capture reaction rates and of the detection limits for some isotopes were performed. Through all these calculations, the feasibility of the application of the PGAA method at the IPR-R1 installations was evaluated. According to the obtained results, it can be concluded that is possible to apply the PGAA method at the IPR-R1 reactor, even with its design restrictions.

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Section: Neutron Fluence Rate In the Angled Neutron Extractormentioning

confidence: 99%

Monte Carlo Simulations for a Preliminary Design of TRIGA IPR-R1 PGAA Facility

Guerra¹,

Leal²,

Pereira³

et al. 2016

JCCE

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“…Hair zinc was determined without any chemical process by the k 0 -instrumental neutron activation analysis 15 at the Division for Reactor and Irradiation, Laboratory of Neutron Activation Analysis, Development Center for Nuclear Technology/ Brazilian Commission for Nuclear Energy (Centro de Desenvolvimento da Tecnologia Nuclear/ Comissão Nacional de Energia Nuclear CDTN/ CNEN), using the TRIGA MARK I IPR-R1 nuclear reactor, based on the method described by Menezes et al…”

Section: Hair Sampling and Analysismentioning

confidence: 99%

Plasma zinc and hair zinc levels, anthropometric status and food intake of children in a rural area of Brazil

2010

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Plasma zinc and hair zinc levels, anthropometric status and food intake of children in a rural area of Brazil A B S T R A C T ObjectiveThe objective of this study was to investigate the levels of plasma zinc, hair zinc, growth and food consumption in children aged 6 to 24 months in a rural area of Diamantina (MG), Brazil. MethodsPlasma and hair zinc concentrations were analyzed using flame atomic absorption spectrometry and neutron activation analysis, respectively. Weight-for-age, weight-for-height and height-for-age, expressed as Z-scores, were measured according to the World Health Organization reference curves. Dietary zinc intake was determined by a 3-day dietary recall filled out by the mother or guardian. ResultsZinc deficiency was found in 11.2% and 16.8% of the children according to plasma zinc e hair zinc levels, respectively. Mean plasma zinc and hair zinc for children ≤11 (49) and >11 (127)

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“…No método k 0 , padrões não são utilizados e sim monitores de fluxos de nêutrons, parâmetros espectrais do reator e sistema de espectrometria gama absolutamente calibrado (BODE; FERNANDES; GREENBERG, 2000;CAVALCANTE et al, 2016;DE CORTE, 1987;DE SOETE;GIJBELS;HOSTE, 1972;FRIEDLANDER et al, 1981;HAZENFRATZ et al, 2016;MENEZES & JACIMOVIC, 2008;MENEZES et al, 2003;).…”

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Estudo sobre os teores de Tório, Urânio e Potássio nas águas superficiais e sedimento marginal do Rio Piracicaba, Minas Gerais, Brasil

Queiroz

Sabará

Queiroz

et al. 2017

Eng. Sanit. Ambient.

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Keywords: radioisotopes; rio piracicaba; Minas Gerais; environmental risk; neutron activation analysis. INTRODUÇÃOA exigência quanto ao desenvolvimento sustentável é uma realidade associada ao crescimento socioeconômico com a demanda por novos serviços e produtos em um mercado atingido duramente pela rapidez da evolução tecnológica. A dicotomia entre as facilidades alcançadas através dos recursos técnicos disponíveis e o bem-estar social faz parte dessa realidade.

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k0-Instrumental Neutron Activation Analysis Establishment at CDTN, Brazil: A successful story

Cited by 29 publications

References 3 publications

Monte Carlo Simulations for a Preliminary Design of TRIGA IPR-R1 PGAA Facility

Monte Carlo Simulations for a Preliminary Design of TRIGA IPR-R1 PGAA Facility

Plasma zinc and hair zinc levels, anthropometric status and food intake of children in a rural area of Brazil

Estudo sobre os teores de Tório, Urânio e Potássio nas águas superficiais e sedimento marginal do Rio Piracicaba, Minas Gerais, Brasil

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