METHOD FOR NONDESTRUCTIVE INSPECTION OF PRODUCT IN COURSE OF ITS OPERATION Russian patent published in 2014 - IPC G01M17/00 

FIELD: instrumentation.

SUBSTANCE: defectiveness of a product is defined by nondestructive inspection method (critical sizes χ_cr of defects in the course of operation and sizes of [χ]_p.o. defects permissible in operation, N_rev, probability of defects revealing P_exist, initial defectiveness N_init, residual defectiveness N_res before the operation start, residual defectiveness of a product after repair if the latter was carried out, revealed defects by existing test methods). The residual defectiveness at the moment of reaching the inspection time at initial frequency F_exist which will change due to the increase of defects in the course of operation. The value of the residual defectiveness shift is defined by calculations depending on the mechanism and operating conditions. The obtained new curve is regarded as a limit curve of residual defectiveness which is not permitted to be exceeded at new frequency F_new. The limit curve of residual defectiveness is used to determine requirements to a new ISNI.

EFFECT: decreased frequency of in-service nondesructive inspection without product reliability deterioration.

2 cl, 8 dwg