Authors & Affiliations
Zhukov A.V., Kuzina U.A., Sorokin A.P., Privezentsev V.V., Rymkevich K.S.
A.I. Leypunsky Institute for Physics and Power Engineering, Obninsk, Russia
Kuzina U.A. - Head of Laboratory of Safety Department, Cand. Sci. (Tech.), A.I. Leypunsky Institute for Physics and Power Engineering. Contacts: 1, sq. Bondarenko, Obninsk, Kaluga reg., Russia, 249033, Tel.: (484) 399-83-63, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
Zhukov A.V. – Leading researcher of Safety Department, Dr. Sci. (Tech.), A.I. Leypunsky Institute for Physics and Power Engineering.
Sorokin A.P. – Deputy Director of Safety Department, Dr. Sci. (Tech.), A.I. Leypunsky Institute for Physics and Power Engineering.
Privezentsev V.V. – Leading researcher of Safety Department, Cand. Sci. (Tech.), A.I. Leypunsky Institute for Physics and Power Engineering.
Rimkevich K.S. – Leading engineer of Safety Department, A.I. Leypunsky Institute for Physics and Power Engineering.
Abstract
As a result of experimental thermal hydraulic research using a model fuel assembly of BREST reactor core with spacer grids in the area of the non-heated bearing rod experimental data describing the bearing rod effect to the temperature fields and heat transfer of fuel pin simulators were for the first
time obtained. It is revealed that temperature of surface of the measuring pin simulator and coolant
temperature in the cells near the bearing rod decrease. Thus «the temperature hole» that influences
to heat transfer and maximum temperature non-uniformities along the perimeter of fuel pin simulators near the bearing rod is formed. In the model with the bearing rod on the smooth heating areas
the maximum temperature non-uniformity along the perimeter of the measuring pin simulator increased three times at Pe≅1150 in comparison with the model without the bearing rod. The spacer
grids in the model with the bearing rod result to some increase in non-uniformities (about 20%).When
processing temperature fields along the whole perimeter of the measuring fuel pin simulator decrease
in Nusselt numbers is about 10% in comparison with the model assembly without the bearing rod.
The reason is the increased temperature non-uniformities along the perimeter of the measuring pin
simulator. The spacer grids result in local increase of Nusselt numbers ~25% up in comparison with
smooth heating areas at Pe≅1150.
Keywords
fast reactor, liquid metal coolant, fuel assembly, fuel pin simulators, spacer grids, non-heated bearing rod, experimental thermal hydraulic research, heat transfer, temperature field, smooth heating areas
Article Text (PDF, in Russian)
References
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UDC 621.039
Problems of Atomic Science and Technology. Series: Nuclear and Reactor Constants, 2016, issue 5, 5:14
