Authors & Affiliations
Melnikov V.P., Posazhennikov A.M., Zuboreva M.V., Voronin I.A., Doboni K.A.
A.I. Leypunsky Institute for Physics and Power Engineering, Obninsk, Russia
Melnikov V.P. – Leading Researcher, Cand. Sci. (Tech.).
Posazhennikov A.M. – Head of Laboratory.
Zuboreva M.V. – Junior Researcher.
Voronin I.A. – Senior Researcher. Contacts: 1, pl. Bondarenko, Obninsk, Kaluga region, Russia, 249033. Tel.: +7 (484) 399-51-91; e-mail:
Doboni K.A. – Research Intern.
Abstract
During the operation of circuits with heavy liquid metal coolant (lead, lead-bismuth), impurities accumulate, which have a negative impact on the operation of systems and devices in the circuits of liquid metal cooling of nuclear power plants. Filters with various types of filter materials are used for cleaning from undissolved impurities, while bulk-type filter materials are the most effective.
When developing the filter design in order to ensure its effective operation, knowledge of the features of possible mechanisms for capturing impurities by the filter, as well as its hydraulic resistance to the movement of the coolant in all elements, including in the filter material, is required. The use of reference information makes it possible to determine almost all the values of the local filter resistances, depending on its design. However, it is advisable to determine the hydraulic resistance of the filter material experimentally, since it may depend on its specific characteristics (porous structure, geometry, thickness of layers, etc.). Since direct measurement of the hydraulic resistance of the filter material during the flow of HLMC is quite a difficult task, it was decided to carry out a measurement on a modeling liquid – water. According to the results of the conducted studies, it was found that the hydraulic resistance of the EKOWOOL-M2-4 filter material (10 layers) is no more than 0.05 MPa at a filtration rate of 1 cm/s. The data obtained are in good agreement with the previously conducted experimental measurements, so for 10 layers of MKTT-2.2A, the hydraulic resistance was 0.035 MPa at a filtration rate of 1 cm/s.
Keywords
heavy liquid metal coolant, suspended impurities, coolant filter, filter material, impurity particles, lead-bismuth alloy, filter hydraulic resistance, filter resistance, hydraulic studies, filtration efficiency, coolant velocity
Article Text (PDF, in Russian)
UDC 621.039.534
Problems of Atomic Science and Technology. Series: Nuclear and Reactor Constants, 2023, no. 4, 1:15