Patent ID: 8243870
Filing Date: 2012-08-14
Classification: G21C,Y02E

Abstract:
1. An apparatus for removing a thermal sleeve from a cold leg of a reactor coolant system, the thermal sleeve being installed to minimize the effect of thermal shock at a junction between a coolant pipe of a reactor and a safety injection pipe connected to a midway position of the coolant pipe, the apparatus comprising: a sleeve removal tool including a corn head formed at a front end of a shaft having a predetermined length, a pressure plate provided below the corn head to maximize the effect of hydraulic pressure inside the safety injection pipe, the pressure plate being divided into a plurality of sections so as to be folded or unfolded, a spring connected to an upper surface of the pressure plate to keep the pressure plate in an unfolded state, and a guide wheel provided at a midway position of the shaft to guide the sleeve removal tool into the safety injection pipe: a horizontal movement carrier including a plurality of bodies connected to each other by use of a link, a seating rod into which the sleeve removal tool is seated and coupled, and moving wheels installed to the respective bodies so as to allow the horizontal movement carrier to horizontally slide and move along the coolant pipe; and a vertical movement carrier including first and second anti-separation bars provided respectively at front and rear ends thereof to prevent the horizontal movement carrier from being separated from the vertical movement carrier during upward or downward movement thereof inside the reactor, the second anti-separation bar located at the front end of the vertical movement carrier being pivotally rotatable about a hinge.