The demonstration phase for piping and RPV shell welds has provided significant information relative to the reliability of ultrasonic examinations. More than 500 candidates and 20 organizations have participated in the Program. Measurements have exceeded 5,000 for sizing and 14,000 for piping detection and length sizing. Detection and sizing measurements for the RPV are on the order of 10% of the piping totals. Both piping and bolting statistics provide a significant database of inspection reliability information, which can provide a strong technical justification for future applications.

Phase II of the PDI program is addressing important problems that could significantly the cost and effectiveness of the US performance demonstration approach. These include the Nozzle inner-radius examination from the outside surface, nozzle to shell weld examinations and dissimilar metal welds. In each case PDI is pursuing an approach which will provide:
An effective demonstration of procedure, personnel and equipment capabilities
A cost effective method of demonstration and
A uniform implementation across the industry.

Important lessons we have learned through our experience in this process include: has been that The performance demonstration administrator can work with the candidate organization/personnel in a way that provides the candidate with the best opportunity for success without jeopardizing his independence or the security of test specimen information.

Reasonable solutions are possible to achieve effective yet cost efficient demonstrations. Overly conservative flaw size and reliability input requirements may frustrate the demonstration process and will certainly result in unreasonable costs and will likely result in disillusionment of all parties concerned.

The performance demonstration process has improved the capability and quality of ultrasonic examination in the US.