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Application of Advanced Ultrasonic Technique Vs. ASME Code Experience of Kozloduy NPP, Unit #1 RPV Examinations

Autor: Mato Cvitanovic - INETEC Institute for Nuclear Technology, Croatia
Co-Autor: Vladimir Zado, INETEC Institute for Nuclear Technology, Croatia; Ivo Alexandrov,
Sabin Sabinov, Vasil Nichev - Kozloduy NPP, Bulgaria
Contact

ABSTRACT

1. INTRODUCTION

2. APPROACH TO TRANSDUCER CALIBRATION AND DATA ANALYSIS OF THE NOZZLE BORE DISSIMILAR METAL WELDS ULTRASONIC EXAMINATIONS

TRANSDUCER SLED POSITION TRANSDUCER S/N (REFR.ANGLE IN DEGREE/BEAM DIRECTION) REFERENT REFLECTOR ON CAL.BLOCK No. 02A AMPLITUDE DIFFERENCE (dB) REFERENT REFLECTOR ON CAL.BLOCK No. 02A AMPLITUDE DIFFERENCE (dB) REFERENT REFLECTOR ON CAL. BLOCK No. 02A AMPLITUDE DIFFERENCE (dB)
2 99-523(45/IN) 12 +11.7 8* +2.9 11 +7.9
8 99-519(70/IN) 13 +6.8 14 +3.4 15 +3.4
Table 2: Differences-Example (Examination Sensitivity Comparison)
*Per Procedure reflector is not used for calibration and need to be verified for detection only

3. ASME CODE DISSIMILAR METAL WELD EXAMINATIONS

4. CONCLUSION

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