FIELD: nuclear engineering.
SUBSTANCE: proposed method for periodic checkup of supporting structures hot pipelines covered with heat insulation in nuclear power stations includes visual check, excitation of free natural oscillations of pipeline section under check by applying single force pulses, analysis of these oscillations to obtain natural dynamic characteristics of pipeline, installation and rigid fixation of hollow barrels, each incorporating lid and at least two plates for mounting measuring transducers, and installation of heat insulation on pipeline; free natural oscillations are excited by force applied to upper lids of hollow barrels, spectrums of natural oscillation frequencies obtained during initial operating period of pipeline and by moment of checkup are compared, and microdefects in supporting structures of hot pipelines, if any, are judged from results of this comparison.
EFFECT: enhanced efficiency of checkup.
1 cl, 3 dwg
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