Abstracts and Available Papers Presented at the 2003 International RERTR Meeting
A MTR FUEL ELEMENT FLOW
DISTRIBUTION MEASUREMENT
PRELIMINARY RESULTS
W. M. Torres, P. E.
Umbehaun, D. A. Andrade and J. A. B. Souza
Centro de Engenharia Nuclear
Instituto de Pesquisas Energéticas e Nucleares
Avenida Professor
Lineu Prestes 2242
Cidade Universitária
– São Paulo – São Paulo – ZIP 05508-970 - Brasil
Abstract
An instrumented dummy fuel element
(DMPV-01) with the same geometric characteristics of a MTR fuel element was
designed and constructed for flow distribution measurement experiments at the
IEA-R1 reactor core. This dummy element was also used to measure the flow
distribution among the rectangular flow channels formed by element fuel plates.
Two probes with two pressure taps were constructed and assembled inside the
flow channels to measure pressure drop and the flow velocity was calculated
using pressure drop equation for closed channels. This work presents the
experimental procedure and results of flow distribution measurement among the
flow channels. Results show that the flow rate in the peripheral channels is 10
to 15% lower than the average flow rate. It is important to know the flow rate
in peripheral channels because of uncertainties in values of flow rate in the
open channel formed by two adjacent fuel elements. These flow rates are
responsible by the cooling of external fuel plates.
Contact: Mr. Walmir Maximo Torres
IPEN
Av. Professor
Lineu Prestes 2242
Cidade
Universitária – São Paulo
Brazil
CEP05508-970
Phone: +55 (11) 3816-9199 ext. 268
Fax: +55 (11) 3816-9428
E-mail: [email protected]
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