ASNT IRRSP case studies
ASNT IRRSP · Put your knowledge to work in context.
The ASNT Industrial Radiography Radiation Safety Personnel (IRRSP) certification is a radiation-safety credential for people who work with industrial radiography sources and equipment. Rather than testing a person's ability to shoot and interpret a radiograph, it tests whether that person can work safely around the radiation used to produce one: understanding the physics, respecting the exposure controls, using survey instruments and dosimeters correctly, following the applicable regulations, and knowing exactly what to do when something goes wrong. The ASNT IRRSP case studies are 5 cases and about 4,406 words.
1Shielding a Temporary Boundary With Limited Material
You are the radiographer on a plant expansion job. Your exposure device holds a 120 Ci iridium-192 source, and the shot is a column weld at 18 in.
757 words, about 4 min2Dose Budget for a Declared Pregnant Worker
A radiographer's assistant with two years on the crew hands you a written notice that she is pregnant; she is about 12 weeks along. She works nights at a fixed facility, cranking the source and handling film, and wants to keep working until delivery.
803 words, about 4 min3Instrument Fails the Check Source Mid-Shift
Third exposure of the night at a remote compressor station: 55 Ci iridium-192, crank-out camera, 20 ft source guide tube. You crank the source back in; the lock ring seats and the crank flag lines up.
898 words, about 4 min4Camera Takes a Fall Before the Day's Work
Loading at the shop at 05:30, a 35 Ci iridium-192 crank-out camera slides off the tailgate and lands on asphalt on its lock-ring end, a fall of about 3 ft. There is a visible dent beside the lock ring and a fresh paint crack.
907 words, about 5 min5Source Fails to Return on the Second Exposure
Night shot on a pipeline tie-in: 40 Ci iridium-192 crank-out camera, 30 ft source guide tube, collimator, a two-person crew and a welder's helper working 25 ft away. Second exposure of the night.
1,041 words, about 5 min