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Academic Articles
(Technical Note) Vol.1 (2009) p.63 - p.67
 
Progress of Performance Demonstration in Japan
 
Toshihiko SASAHARA, Tamotsu JIKIMOTO and Koichiro HIDE
 
Central Research Institute of Electric Power Industry, 2-6-1 Nagasaka, Yokosuka-shi, Kanagawa-ken, 240-0196, Japan
 
Abstract
On November 1, 2005, Central Research Institute of Electric Power Industry (CRIEPI) established PD Center to promote the Performance Demonstration (PD) qualification examination. The 1st Japanese PD qualification examination started in March, 2006, and was operated by PD Center of CRIEPI. As of August 31, 2008, 21 examination courses have finished and 24 out of 37 candidates passed the examination. The total number of test including retest was 60. Increase in the examination pass rate of retest personnel indicates improvements in the sizing technique by training. A common reason of failure is so called “overcall” that cannot identify weld to base-metal interface echoes from crack tip echoes. This result suggests an importance of more practical training using realistic samples.
 
Keywords
Performance Demonstration, ultrasonic examination, flaw depth sizing, IGSCC
 
Full Text: PDF
 
(Received: November 14th, 2008)