Radiographers' and RP word for one exposure of a weld or component, made by cranking a gamma source such as iridium-192 out of its shielded camera or by energising an X-ray tube. Each shot requires a cleared and roped boundary, typically at the dose rate allowed for unmonitored people, plus surveys before and after to confirm the source has returned. Plants schedule shots for nights and weekends to clear as few people as possible.
Radiography has three shots on the feedwater welds at 0200, so the turbine deck is closed till they're done.
Respect a radiography boundary even in the middle of the night; those sources are among the strongest ever taken out of shielding on site.
Also heard as
- radiography shot
- RT shot
Related terms
Sealed source
Radioactive material permanently sealed in a capsule so it cannot escape under normal use.
Curie
The non-SI unit of radioactivity, equal to 37 billion decays per second.
Rad rope
Yellow and magenta rope, ribbon or chain used to mark the boundary of a radiological area.
High radiation area
A posted area where a person could receive more than 1 mSv (100 mrem) in an hour at 30 cm from a source.
Same word, different worlds
One full stroke of a manual grease gun, the everyday unit for how much grease goes in.
Welding, Brazing & NDEShop word for a radiograph of a weld, or the act of X-raying it, as in the weld got shot.
Photonics & LasersA single laser pulse, especially from a high-energy or low-repetition-rate system.
NonwovensSmall beads or lumps of polymer that failed to form fibers and sit embedded in a meltblown web.