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Abstract

This report presents the results of the Centrifugally Cast Stainless Steel Round Robin Test (CCSSRRT). The CCSSRRT is the first phase of an effort to investigate and improve the capability and reliability of NDE inspections of light water reactor piping systems. This phase was a screening test to identify the most promising procedures presently available for CCSS. The next phase will be an in-depth programme to evaluate the capability and reliability of in-service inspections (ISI) for piping. In the CCSSRRT, 15 centrifugally cast stainless steel pipe sections containing welds and laboratory-grown thermal fatigue cracks in both columnar and equiaxed base material were used. These pipe specimens were inspected by a total of 18 teams from Europe and the United States using a variety of NDE techniques, mostly ultrasonic (UT). The inspections were carried out at the team's facilities and included inspections from both sides of the weld and inspections restricted to one side of the weld. Several of the techniques employed in the CCSSRRT demonstrated a potential for discriminating between cracked and uncracked material. However, because of the high number of false crack calls reported by many of the inspecting teams it was difficult to demonstrate that some of the techniques could effectively discriminate between thermal fatigue cracks and uncracked centrifugally cast stainless steel.

Additional information

Authors: DOCTOR S R BATTELLE PNL, RICHLAND (USA) JEHENSON P JRC ISPRA ESTAB. (ITALY) , BATTELLE PNL, RICHLAND (USA);JRC ISPRA ESTAB. (ITALY)
Bibliographic Reference: 9TH INTERNATIONAL CONFERENCE ON NDE IN THE NUCLEAR INDUSTRY, TOKYO (JAPAN), APRIL, 25-28, 1988, AVAILABILITY: CEC-LUXEMBOURG, DG-XIII-C-3, MENTIONING PAPER EN 34033
Availability: Can be ordered online
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