Eddy current testing of heat exchange tube and tubesheet expansion section of steam generator in nuclear power plant

The quality of the expansion joint of the heat transfer tube of the nuclear power plant steam generator and the tube sheet must be strictly tested while being manufactured. The eddy current testing method is used to implement nondestructive testing of the expanded pipe section. At the same time, the defects found in the testing process are analyzed and summarized, which can provide technical reference for the peers in the actual testing work in the future.