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[en] In service inspection (ISI) of aged power plant parts has a delicate task to provide information on presence, position, orientation and size of defects in material. As far as results of ISI are just a starting point for elaborate procedure of structural integrity assessment, the accuracy and reliability of these results are particularly important. Time of Flight Diffraction (TOFD) technique is regarded as superior ultrasonic technique capable to fulfil required goals. In Slovenia TOFD is approved in nowadays routine inspection of components of conventional power plants. As there were no practical use of TOFD in Slovenian NPP yet, some experience from Slovenian conventional thermal power plants are presented. Results of TOFD inspections of turbine rotor and turbine inlet casing are shown. Simplified integrity assessment procedure (Nuclear Electric R6 procedure) can satisfy needs for assessing integrity of components in conventional PP, instead of detailed 3-D finite element simulation. Example of application of R6 procedure in conventional PP is shown in this paper . Although R6 results are relatively conservative, this relatively simple to use procedure could meet requirements for assessing safety margins in domestic Nuclear power plant too. (author)
Source
Mavko, B.; Cizelj, L.; Kovac, M. (Nuclear Society of Slovenia (Slovenia)) (eds.); Nuclear Society of Slovenia, Ljubljana (Slovenia); Inst. Jozef Stefan, Ljubljana (Slovenia). Funding organisation: Ministry of Science and Technology of Slovenia, Ljubljana (Slovenia); Ministry of Economic Affairs of Slovenia, Ljubljana (Slovenia); European Nuclear Society, Brussels (Belgium); American Society of Mechanical Engineers, New York, NY (United States); NPP Krsko (Slovenia); Westinghouse Electric Systems Europe S.A., Brussels (Belgium); CAE, Toronto (Canada); Siemens AG, Erlangen, Offenbach (Germany); Faculty of Mathematics and Physics, Univ. of Ljubljana (Slovenia); Framatome, Paris (France); Inetec, Zagreb (Croatia); SIAP d.o.o, Pesnica pri Mariboru (Slovenia); IBE d.d. Consulting Engineers, Ljubljana (Slovenia); Inst. of Metals and Technology, Ljubljana (Slovenia); NUMIP d.o.o, Krsko (Slovenia); Q Techna d.o.o., Krsko (Slovenia); Elmont d.o.o., Krsko (Slovenia); Slovenian Nuclear Safety Administration, Ljubljana (Slovenia); Agency for Radwaste Management, Ljubljana (Slovenia); ENCONET Consulting GmbH, Vienna (Austria); The Inst. of Metal Constructions, Ljubljana (Slovenia); The Milan Vidmar Electroinstitute, Ljubljana (Slovenia); Welding Inst., Ljubljana (Slovenia); 13.8 Megabytes; ISBN 961-6303-29-5; 
; 2000; [8 p.]; International Conference Nuclear Energy in Central Europe 2000; Bled (Slovenia); 11-14 Sep 2000; Also available from Slovenian Nuclear Safety Administration, Zelezna cesta 16, Ljubljana (SI) or Nuclear Society of Slovenia, Jamova 39, Ljubljana (SI); 17 refs., 6 figs.
; 2000; [8 p.]; International Conference Nuclear Energy in Central Europe 2000; Bled (Slovenia); 11-14 Sep 2000; Also available from Slovenian Nuclear Safety Administration, Zelezna cesta 16, Ljubljana (SI) or Nuclear Society of Slovenia, Jamova 39, Ljubljana (SI); 17 refs., 6 figs.