ASNT IRRSP study guide
ASNT IRRSP · Work through your exam, one topic at a time.
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 study guide has 6 sections and about 1,959 words.
01Radiation Safety Fundamentals and Radiation Physics
Ionizing radiation removes electrons from atoms. Alpha and beta are particulate; gamma and x-rays are electromagnetic photons.
353 words, about 2 min02Biological Effects of Radiation and Radiation Protection
Damage begins with ionization of water and DNA. Effects are deterministic (threshold dose, severity increases with dose: erythema, cataract, sterility, acute radiation syndrome) or stochastic (no threshold, probability increases with dose: cancer, heritable effects).
321 words, about 2 min03Radiation Detection, Survey Instruments and Dosimetry
Ionization chambers (including pressurized chambers) give accurate, relatively energy-independent exposure/dose-rate readings and are the usual choice for radiography surveys. Geiger-Mueller (GM) detectors are very sensitive but energy dependent, have dead time, and can saturate and read falsely low or zero in intense fields - never rely on a GM alone near an unshielded source.
347 words, about 2 min04Industrial Radiography Operations and Equipment
A gamma exposure device (camera) holds a sealed source in a shielded position. The source assembly attaches to a drive cable and pigtail, travels through a guide tube, and is collimated at the workpiece.
305 words, about 2 min05Regulations, Licensing and Recordkeeping
Radiography is regulated by the NRC or an Agreement State under 10 CFR 34 (radiographic operations), 10 CFR 20 (dose limits and postings) and 10 CFR 30 (possession), with transport governed by DOT rules in 49 CFR. A license (or registration) is required to possess and use sources; the license names the radiation safety officer and defines authorized devices, users and locations.
327 words, about 2 min06Emergency Procedures and Accident Response
Stop work, keep people out, notify the RSO, and establish boundaries with a survey meter. Typical events: source fails to retract, source disconnect, damaged device, fire, lost or stolen source, or an unplanned exposure.
306 words, about 2 min