Izvestiya vuzov. Yadernaya Energetika

The peer-reviewed scientific and technology journal. ISSN: 0204-3327

Relations for calculating the transport and thermodynamic properties of lead-bismuth eutectics

3/19/2020 2020 - #01 Chemistry, physics and technology of reactor coolants

Chusov I.A. Pronyaev V.G. Novikov G.E. Obysov N.A.

DOI: https://doi.org/10.26583/npe.2020.1.11

UDC: 621.039.5

The eutectic lead-bismuth alloy has relatively recently begun to be used as a coolant primarily in nuclear transport power plants. At present, this eutectic is regarded as a possible coolant for promising new generation reactor plants.

The generalized systematic analysis of the results of experiments to determine the transport and thermodynamic properties of lead-bismuth eutectics was carried out by P.L. Kirillov with his staff and published back in 1998. However, they do not include numerous experimental results of studies of Russian specialists, which are characterized by methodical thoughtfulness, use of modern instrumentation and careful data processing. The emergence of new data has led to the need to clarify and correct the existing computational relationships.

Recommended ratios for calculating the thermodynamic and transport properties of lead-bismuth eutectics (44.5% Pb + 55.5% Bi) are presented: density, coefficient of dynamic viscosity, specific heat capacity, thermal conductivity coefficient, surface tension coefficient, specific electrical resistance and local sound velocity as a function of temperature. The mentioned relations are based on the calculated analysis of data given in 38 experimental works carried out in our country and abroad and published for the period from 1923 to 2015. The authors had information about 1085 experimental points, but only 1058 points were suitable for direct estimates. The main difficulty in data processing was that the experiments considered in the work were carried out at different times using various measurement methods, ununiform statistical processing methods, different degree of bismuth purity, etc. The basis of data evaluation methods was a modified method of least squares, which allowed taking into account the errors of the experimental data accepted for consideration.

Error values of the proposed relations and temperature ranges of their applicability are given in this paper. The article is based on the results of the work of the Thermodynamic Properties Data Center (TsDTS IATE NIYaU MIFI) of Rosatom State Corporation.


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lead-bismuth eutectic heat capacity thermal conductivity local sound velocity regression density viscosity