Tollster
Veteran Member
Tolster,thanks for the info about your job.
The thing about u.t. verses r.t. is u.t is most operator dependant.[if operator is flawed so is test]
R.t. you have a piece of film,where every body and his brother can agrue about it,they can see it as well as the guy who made the shot and interpreted it.
But,after looking at these welds, don't think u.t./m.t. /p.t/e.t.[be real hard to x-ray the fillit weld],is needed,just a very casual v.t..
The versus has always been argument, but as UT has evolved, particularly with the automated UT, its considerably more accurate, and when viewed on an optical disc, its hard to hide any calibration errors. But like other NDE exams, it still has variables, many folks still consider it voo-doo, but it has a place and I believe the two disciplines compliment one another and should be used in conjunction when questions arise, or independent of each other depending on time, dose, and mobility come into play.
Danno, never been to Seabrook, but Pilgrim station (Mass.), and Millstone (Conn.). At last count I have only been to 32 US nukes. Its interesting stuff and many of the welds we examine are existing welds off the reactor, pumps, valves coolant etc.. We still do new stuff for mods and replacements. But I tend to enjoy the existing weld inspection the most. The main concerns are cyclic, and thermal fatique, and IGSCC in the stainless. I can only count about 5 outages in 22 years I personally have extended due to major findings in existing equipment. I was at TMI during 9-11, and mapped the head indications at Davis Besse.

This was a high dose, high contamination dive on a recirc valve bowl internal. I have one set of cotton coveralls, plastic booties, cotton gloves , cotton hood, two sets of rubber gloves, and two sets of rubber boot covers, one gortex "ninja" coverall, one powervisor, and one cotton face sock. I was performing a stellite seat verification with the stick magnet you see in my hand.