EXTENDING TYPE NOZZLE DAM

摘要

PURPOSE: An extension type nozzle dam is provided to prevent a sealing gasket due to hydraulic pressure by supporting a sealing gasket with a disk formed with extended wing pieces. CONSTITUTION: A support unit(1) is temporarily fixed to the peripheral part of a nozzle after passing through the inlet of a steam generator. An extension unit is separated from the lower side of the support unit and is inserted into the nozzle. The extension unit includes a lower plate(21) combined with the lower side of the support unit and a plurality of wing pieces(22). The plurality of wind pieces are radially hinge-coupled with the lower plate. A driver(3) extends the extension unit or folds the extended unit.