HEIGHT MEASUREMENT DEVICE OF CONTROL ROD DRIVE SHAFT

摘要

A height measurement device of a control rod drive shaft(CRDS) is provided to measure total height of the CRDS and button height of the CRDS at the same time when the separated CRDS is connected to a nuclear reactor control rod, by comprising a measurement unit installed on an upper part of a center through-hole of a base frame. A base frame(16) has through-holes(12,14). A tube(18) is installed to penetrate through a center through-hole of the base frame. A guide part(20) is installed on the outer circumference of a bottom of the tube, and guides a control rod drive shaft of a nuclear reactor to a path of the tube. A shaft is slid up and down according to the guide of the control rod drive shaft. A measurement unit measures the total height of the control rod drive shaft and the height of a control rod drive shaft button at the same time. A hooking ring(26) is installed to penetrate through the through-holes(12,14) of the base frame.