Radiological Exposure Devices (REDs)
RED
RED
A light bulb would meet this description.
RED
In most cases you would be just fine, the water absorbs most of the radiation so there isn't much on the surface of the pool. Many plants routinely have divers go into the pool to repair lights and various other components. The biggest concern would be contamination, after getting out of the water you'd likely have to spend awhile with the Radiation Technicians while they decontaminate you. So long as you don't ingest mass quantities of the water or actively dive toward the fuel assemblies, you should emerge unscathed.
RED
RED
RED
RED
RED
RED
Radiological Exposure Devices (REDs)
Radiological Exposure Devices (REDs)
Radiological Exposure Devices (REDs)
Radiological Exposure Devices (REDs)
Radiological Exposure Devices (REDs)
Radiological Exposure Devices (REDs)