The NPP Steam Generators Tube Inspections by Eddy Current and Relation to its Structural Integrity in Russia
K. Kornienko, Concern Rocenrgoatom; A. Getman, VNIIAES; N. Davidenko, Concern Rosenergoatom, Moscow, Russia
ABSTRACT
A unit 2 Balakovo NPP was shut down because steam generator (SG) tubes had failed with outer diameter stress corrosion cracking (ODSCC). Novel, single-pass eddy current transmit-receive probes, were successful in detecting all significant cracks so that the cracked tubes could be plugged and the unit restarted. Results from metallurgical examinations were used to obtain probability-of detection and sizing accuracy plots to quantify the performance of this new inspection technique. Reviews of accumulate experience of using Eddy Current equipment and communicating probe. The Typical defects meet when checking. Validity of revealing the defects, strategy of evaluation of validity at the decryption of results of checking. The Condition Development to safe usage of tube, having defects. Information on damaging the tube on the unit 2 Balakovo NPP, Areas of location of defects, nature of defects, metallurgical examinations of samples of tubes are presented.
Publication Source: First International Conference on NDE in Relation to Structural Integrity for Nuclear and Pressurised Components , 20 - 22 October 1998, Amsterdam, Netherlands. Held by the Joint Research Centre of the European Commission. Publisher:Woodhead Publishing Limited
NDTnet
