Control rod drive length measurement tool

A tool for checking the length of a control rod drive measured from the top of the control rod drive flange to the end of the uncoupling rod. The tool is a GO-NO-GO gauge with tight tolerance. The top of the tool supports a gage which has an arm that pivots about an axis parallel to the tool axis. T...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	SAXON, EDWARD W, ECKMANN, THOMAS R, ORTEGA, FRANK, SRIDHAR, BETTADAPUR N
Format:	Patent
Sprache:	eng
Schlagworte:	MEASURING MEASURING ANGLES MEASURING AREAS MEASURING IRREGULARITIES OF SURFACES OR CONTOURS MEASURING LENGTH, THICKNESS OR SIMILAR LINEARDIMENSIONS NUCLEAR ENGINEERING NUCLEAR PHYSICS NUCLEAR REACTORS PHYSICS TESTING
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Beschreibung
Zusammenfassung:	A tool for checking the length of a control rod drive measured from the top of the control rod drive flange to the end of the uncoupling rod. The tool is a GO-NO-GO gauge with tight tolerance. The top of the tool supports a gage which has an arm that pivots about an axis parallel to the tool axis. The arm has a stepped notch with a predetermined height equal to the length tolerance range (e.g., 0.0625 inch). The length is considered acceptable when the gage is rotated and the first edge of the stepped notch on the arm just clears the end of the uncoupling rod but the second edge stops the gage from pivoting any further. The length is not acceptable if the first edge of the stepped notch on the arm abuts the uncoupling rod, preventing the gage from pivoting any further, or if the gage misses the uncoupling rod entirely.