QUOTE(AhGuan @ Jan 19 2010, 03:23 PM)
I fresh graduate in nuclear science, so all those radiation n radioactive thingy is really deep in my heart

...I'm keen on RT, especially CR and flash radiography...i did a final yr project on RT before....but then what i can see is, RT is not always a popular method of NDT even it's widely used..most company pefer UT, TOFD and phased array...haizz....but then i think RT is still a very important method..coz not all inspection can be done with UT only...
So nice that our neighbour down south banned Co-60...perhaps with using CR, and digital radiography then we don't need to use Co-60 or have to do exposure up to several hours...damn vry dangerous to do RT on site with Co-60 pig....But then, coz NDT=private sector=business, so they all prefer conventional and leceh screen film RT due to cost.
p.s. I'm going for RT level II course after CNY, is there any NDT coy taking freshies???
Thats coz of the limitations of RT, especiall the safety and health aspects of it in doing inspection.
Not many companies prefer TOFD or phased array due to the cost involved. Conventional UT is now pretty standard but phased array is in a league of its own in terms of the cost. The disadvantage of RT is that it cant accurately determine planar defects and theres a limit on thickness.
Phased array with TOFD was designed to complement conventional UT methods with the advantages of RT but without radiation safety issues. Plus with RT you need to process the film and then interpret it for the results. Phased array has digital storage and can be analyzed on the spot and the reading can be duplicated on either hard or softcopy for a surveyor to see it.
I thought malaysia dont use cobalt 60? If gamma radiation to dangerous, then digital RT uses x-ray in a cone pulsed housing for directed snapshots.