Eddy current method for the characterization of broached tube support plate blockage

A method for determining tube support plate blockage of a steam generator includes the following steps: measuring at least five different eddy current values per tube support intersection; calculating a nominal clean fit radius of flow hole; determining a center signal response; converting the cente...

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Bibliographische Detailangaben
Hauptverfasser:	POP MIHAI G. M, WYATT JOSEPH R, GRIFFITH JOHN C, FLECK JEFFREY M
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING DRESSING OR CONDITIONING OF ABRADING SURFACES FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS GRINDING HEATING INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES LIGHTING MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING MEASURING MEASURING ANGLES MEASURING AREAS MEASURING IRREGULARITIES OF SURFACES OR CONTOURS MEASURING LENGTH, THICKNESS OR SIMILAR LINEARDIMENSIONS MECHANICAL ENGINEERING METHODS OF STEAM GENERATION PERFORMING OPERATIONS PHYSICS POLISHING STEAM BOILERS STEAM GENERATION TESTING TRANSPORTING WEAPONS
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Beschreibung
Zusammenfassung:	A method for determining tube support plate blockage of a steam generator includes the following steps: measuring at least five different eddy current values per tube support intersection; calculating a nominal clean fit radius of flow hole; determining a center signal response; converting the center signal response to a deposit thickness; determine an edge reduction; converting the edge reduction to an edge thickness; calculating the resulting flow hole radius; verifying the reasonableness of the resulting flow hole radius; and determining a virtual calibration range.