METHOD FOR REMOVAL OF PRESSURE TUBES AND CALANDRIA TUBES FROM A NUCLEAR REACTOR

摘要

A calandria tube, a pressure tube, and first and second end fittings joined to opposing end portions of the pressure tube, are removed from the calandria of a nuclear reactor by first cutting through the pressure tube inboard of each of first and second bell shaped end portions of the calandria tube to form a main pressure tube portion between first and second severed pressure tube end portions. The first and second end fittings together with the respective joined first and second severed pressure tube end portions are removed. The calandria tube is cut outboard of the main pressure tube portion and inboard of the second bell shaped end portion to form a main calandria tube portion, and a severed calandria tube end portion. The main calandria tube portion together with the main pressure tube portion are then removed from the calandria. The severed calandria tube end portion is also removed from the calandria.