CONTROL ROD DRIVE (CRD) TUBES, METHOD OF MANUFACTURE, AND INSTALLATION THEREOF

摘要

A control rod drive (CRD) tube, its manufacture, and installation in a pressurized water reactor (PWR) are disclosed. The control rod drive tube includes a tube body adapted to penetrate an aperture in an RPV head; and an offset flange formed around the circumference of the tube body at a predetermined location along the length of the tube body. The offset flange increases in the circumferential direction from a first point along the circumference of the tube body to a second point along the circumference of the tube body. [Reference numerals] (690) Alloy