NDT.net - October 1999, Vol. 4 No. 10

Experience Gained From Inservice Inspection of PWR Main Coolant Pump Welds, Conducted from the Inner Surface, using a Qualified UT and ECT Procedure

G. Maes, J. Cermak (AIB-Vinçotte International, Belgium)
H. Martinsen, H. Fernström (Vattenfall AB Ringhals, Sweden)

Corresponding Author Contact:
Email: guy.maes@aib-vincotte.be

TABLE OF CONTENTS


ABSTRACT

INTRODUCTION

THE RINGHALS EXAMINATION CONCEPT FOR THE RCP INSERVICE INSPECTION

OUTLINE OF THE COMBINED UT AND ECT PROCEDURE

DESIGN OF THE NDT SYSTEM

QUALIFICATION AND CERTIFICATION

INSERVICE INSPECTIONS AT THE RINGHALS SITE

CONCLUSIONS

References

  1. Silk M.G., "Ultrasonic techniques for inspecting austenitic welds", in Research Techniques in NDT, Vol. IV, Academic Press, 1980.
  2. Fernström H., "Inservice inspection of PWR reactor coolant loops - A challenging project", 14th Int. Conf. on NDE in the Nuclear and Pressure Vessel Industries, Stockholm (Sweden), September 1996.
  3. Attaar M., Alford J.W., Davis J.B., Pratt W., Kwech H., "Robot for internal inspection of an RCP casing", 14th Int. Conf. on NDE in the Nuclear and Pressure Vessel Industries, Stockholm (Sweden), September 1996.
  4. Martinsen H., "Results from Round Robin Test performed by Vattenfall Ringhals on cast stainless steel", Report nr. 0788/96, June 1996
  5. PISC Report nr. 34, "Report on the evaluation of the inspection results of the cast-to-cast PISC III assemblies 41, 42 and weld B of assembly 43", EUR 15664 EN, 1995.
  6. PISC Report nr. 35, "Report on the evaluation of the inspection results of the wrought-to-cast PISC III assemblies 51 and weld A of assembly 43", EUR 15665 EN, 1995.
  7. Dombret Ph., Maes G., Cermak J., Davis J.B., Attaar M., "Development of a UT/ET procedure for the internal examination of PWR main coolant loop components", 14th Int. Conf. on NDE in the Nuclear and Pressure Vessel Industries, Stockholm (Sweden), September 1996.
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