Steam Generators Tubing Integrity Analysis at Ukrainian NPPs
V. Peker, O. Zinchenko, V. Korniets, ENERGOATOM;
R. Yermolenko, NDE Training and Certification Facility
2nd International Conference on NDE in Relation to Structural Integrity for Nuclear and Pressurized Components, May 24-26, 2000, New Orleans, Louisiana USA
Development, application and availability of advanced eddy-current techniques examination allow to conduct the ET-testing, excluding a subjective approach for assessment of examination results and developing the data base.
The ET-data collected provide opportunity to search for dynamical behavior of degradation mechanisms and defect themselves to conduct corresponding calculations and to estimate the terms of reliable and non-accidental operation.
Since 1997 in the frames of Lisbon Initiative and BMU Programme (Germany) the up-to-date equipment and technologies have been supplied for Ukrainian NPPs to conduct the ET of steam generators. The Intercontrole and INETEC companies provided training and certification of Ukrainian NPP specialists.
This articles deals with the analysis of trends in degradation mechanism of SG tubing depending on water-chemical regime of secondary circuit. The data collected and presented are based at results of SG tubes testing for 11 Ukrainian NPP units during the 1998 - 1999 years.