Delnov V.N., Gabrianovich B.N., Yuriev Yu.S.
A.I. Leypunsky Institute for Physics and Power Engineering, Obninsk, Russia
The paper gives consideration to the engineering solutions on optimization of thermal hydraulics of characteristic elements in the flow-through part ofthe basic equipment and auxiliary systems of the nuclear power plants, that were obtained on the basis of patent information analysis. Header systems, input devices and their individual elements are considered as characteristic elements. An analysis is made of the engineering solutions related to such characteristic elements of the flow-through part as a distributing header system with the central feed of stream and its side exit,a return spatial turn, a distributing header system with the central feed of stream to the tube plate, a header system with the side feed of stream and its central exit, a collecting header systemand input devices. The paper describes the influence of relative positioning of the structural components in the flow-through part, the
design of its entrance region and tube plate, a ratio of the header sizes, complementary structural components, a profile of the vessel and bottom on thermal hydraulics of the characteristic elements of the flow-through part. Indication is given to the directions of improving the design of flow-through part characteristic elements thatmake it possible to reduce energyconsumption for working medium pumping, to provide the required profile of a mass flow rate of working mediumat the characteristic elements outlet, to eliminate the stagnant and vortex zones in their flow-through part, to intensify mixing of the working medium, and to improve the efficiency of removal of impurities from the working
medium. The engineering solutionsare related to BN- and pressure-vessel-type reactors, a steam generator, an intermediate heat exchanger andmodules for working medium purification.
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