Reactor Physics
Mostrando 1-12 de 12 artigos, teses e dissertações.
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1. Determinação experimental de parâmetros de Física de Reatores utilizando refletor de água pesada no Reator IPEN/MB-01 / Experimental determination of Reactor Physics parameters using heavy water reflector at the IPEN/MB-01 Research Reactor facility
Este trabalho apresenta a realização de experimentos no reator nuclear IPEN/MB-01 submetido à presença de um refletor com água pesada instalado na sua face oeste. Após a instalação do refletor no reator foram conduzidos três tipos de experimentos: A calibração das barras de controle, a verificação da influência do aumento da temperatura do mode
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 26/07/2012
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2. Reações nucleares de alta energia (" Spallation") e sua aplicação em cálculo de sistemas nucleares acionados por Fonte / High energy nuclear reactions ("Spallation") and their application in calculation of the acceleration driven systems (ADS)
Neste trabalho apresentamos um estudo das reações nucleares de alta energia que são fundamentais na definição do termo fonte dos reatores nucleares subcríticos acionados por fonte externa. Estas reações nucleares, também conhecidas como "spallation", consistem na interação de hádrons de alta energia com os núcleons do núcleo atômico. A fenomen
Publicado em: 2011
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3. Simulação da geometria e do desempenho do detector de antineutrinos do Projeto Angra / Simulation of the design and performance of the detector antineutrinos Angra Project
In this work is presented a comparative study between some geometries for the Neutrinos Angra Project detector. This Project was born from a colaboration that is dedicated to the construction of a compact antineutrinos detector for monitoring, in real time, the thermal power of Angra II nuclear reactor. Through the antineutrinos ux is possible to get informa
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/11/2009
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4. Measurements of the neutron spectrum energy in the IPEN/MB-01 reactor core
This work presents the results of neutron spectrum measurements at central position of the IPEN/MB-01 reactor core. For this purpose has been used several activation foils (Au, Sc, U, Mg, Ti, Ni, and In Foils) that have been irradiated at central position of the reactor core (standard rectangular configuration 28 × 26 fuel rods) in the maximum power level (
Brazilian Journal of Physics. Publicado em: 2009-03
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5. A STUDY OF PHYSICS OF SUB CRITICAL MULTIPLICATIVES SYSTEMS DRIVEN BY SOURCES AND THE UTILIZATION OF DETERMINISTICS CODES IN CALCULATION OF THIS SYSTEMS / Um estudo da física de sistemas multiplicativos subcríticos acionados por fontes e a utilização de códigos determinísticos no cálculo destes sistemas
This work presents the Physics of Source Driven Systems (ADS). It shows some statics and kinetics parameters of the reactor Physics and when it is sub critical, that are important in evaluation and definition of these systems. The objective is to demonstrate that there are differences in parameters when the reactor is critical. Moreover, the work shows the d
Publicado em: 2008
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6. Filmes intermediários para deposição de diamantes CVD sobre aços / Intermediate films for diamond deposition on steel
The present work is inserted in the area of Chemical Vapor Deposition of Diamond thin and freestanding films. The CVD diamond deposition on steel substrates is still a great challenge to overcome. Iron-like materials present negative effects for the CVD diamond growth process, as catalytic effects in the preferential nucleation of the graphitic phase and hig
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 31/08/2006
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7. Theory and computer modelling of Alfvén wave heating in TCABR Tokamak / "Teoria e modelamento computacional de aquecimento de plasma por ondas de alfvén no tokamak TCABR"
In this work we present the study of the determination the best regimes and parameters¶for the heating experiments and current generation and plasma flow in the tokamak TCABR. Study of effects of plasma rotation in low frequency (LF), field penetration, absorption and ponderomotive forces in Tokamak Chauffage Alfvén Brésilien (TCABR)is investigated wi
Publicado em: 2006
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8. Estudo da formação de hidrogênio atômico no filamento do reator HFCVD / Study of the formation of atomic hydrogen in the filament of reactor HFCVD
A complexidade do entendimento no processo de deposição de diamantes HFCVD é causada pela interdependência de quatro estágios principais que são: formação de radicais perto do filamento, seu transporte, reações químicas na fase gasosa e reações químicas na superfície do substrato. Para entender os fenômenos que ocorrem durante o processo de d
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/02/2005
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9. Rossi-alpha experiment in the IPEN/MB-01 research reactor
One major objective of this work is to experimentally estimate the following kinetic parameters on the IPEN/MB-01 research reactor at São Paulo: the effective neutron delayed fraction, betaeff, the prompt neutron generation time, lambda, and the ratio betaeff/ lambda. In order to achieve our goal, we will use a microscopic noise technique called Rossi-alpha
Brazilian Journal of Physics. Publicado em: 2005-09
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10. Spallation physics and the ADS target design
This paper reviews the physics of the spallation which is a nuclear reaction in which a particle (e.g. proton) interacts with a nucleus. Given to the high energy of the incident proton, in a first stage it interacts with the individual nucleons in an intranuclear cascade which leads to the emission of secondary particles (neutrons, protons, mesons, etc.). In
Brazilian Journal of Physics. Publicado em: 2005-09
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11. Developement of crisp package for spallation reaction studies and its utilization in ADS (Accelerator Driven System)
The progress of nuclear physics had allowed a better understanding of nuclear structure and reaction mechanisms, but also enables important applications of nuclear energy in our modern way of life. We can point out those ones related to power generation from nuclear reactors, providing an almost inexhaustive power source due to the huge quantities of nuclear
Brazilian Journal of Physics. Publicado em: 2004-09
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12. Systematic investigation of protein phase behavior with a microfluidic formulator
We demonstrated a microfluidic device for rapidly generating complex mixtures of 32 stock reagents in a 5-nl reactor. This “formulation chip” is fully automated and allows thousands of experiments to be performed in a single day with minimal reagent consumption. It was applied to systematically study the phase behavior of the protein xylanase over a larg
National Academy of Sciences.