Instrumented fuel assembly
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2017
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60 YEARS OF IEA-R1: INTERNATIONAL WORKSHOP ON UTILIZATION OF RESEARCH REACTORS
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Resumo
The flow rate in the channel between two fuel assemblies is very difficult to
estimate or measured. This flow rate is very important to the cooling process of the
external plates. This work presents the project and construction of an instrumented
fuel assembly with the objectives of perform more accurate safety analysis for the
IEA-R1 reactor; determine the actual cooling conditions (mainly in the outermost
fuel plate) and validate computer codes used for thermalhydraulic and safety analysis
of research reactors. Fourteen thermocouples were installed in this instrumented
fuel assembly. Four in each lateral channel, one in the inlet nozzle and one in the outlet nozzle. There are three thermocouples in each channel to measure the
clad temperature and one thermocouple to measure the fluid temperature. Three
series of experiments, for three different core configuration were carried out with
the instrumented fuel assembly. In two experiments a box was installed around the
core to reduce the cross flow between the fuel assembly and measure the impact
in the temperatures of external plates. The experimental results obtained with the
instrumented fuel element are very consistent with the phenomenology involved.
Given the amount of information generated and its utility in the design, improvement
and qualification in construction, assembly and manufacturing of instrumented fuel,
this project turned out to be an important landmark on the thermal-hydraulic study
of research reactor cores. The proposed solutions could be useful for other research
reactors.
Como referenciar
UMBEHAUN, P.E.; ANDRADE, D.A.; TORRES, W.M.; RICCI, W. Instrumented fuel assembly. In: 60 YEARS OF IEA-R1: INTERNATIONAL WORKSHOP ON UTILIZATION OF RESEARCH REACTORS, November 28 - December 01, 2017, São Paulo, SP. Abstract... São Paulo, SP: Instituto de Pesquisas Energéticas e Nucleares, 2017. p. 87-88. Disponível em: http://repositorio.ipen.br/handle/123456789/28789. Acesso em: 20 Mar 2026.
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.