Abstract
The paper analyses the main factors affecting the reliability indicators of plate heat exchangers used at NPPs of various factors, namely: materials of heat exchange plates and gaskets, types of working media, loading modes (temperature and pressure), and resistance of sealing elements to ionizing radiation. There are no regulatory methods for thermal and hydraulic calculations for plate heat exchangers used for nuclear power plants. Only separate test methods for plate heat exchangers are proposed. The main failures are identified: external leaks, internal leaks and cases of clogging of heat exchangers. In the conclusions of the work it is proposed to analyze information on the failures of plate heat exchangers operated at LNPP-2, NVNPP-2 and supplied by foreign and domestic firms for more accurate prediction of the operation of plate heat exchangers during operation at NPPs.
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