Actually yes. Gamma radiation is basically a fatal type of radio signal. It is made of electrons and travels at or near the speed of light. You don't store a gamma particle. It has to go from point A to point B in the straightest line possible, it can be effected by gravity.
This is why people blaming radiation in the ocean have no idea what radiation is. Most of the lasting Radiation pollution is made up of heavy metals which gain to many electrons from exposure from Gamma. ie Iron, Zinc, Mercury, Carbon is also surprisingly good at storing electrons. So radioactive waste is never gamma particles, or any other source radiation, they are elements with to many electrons and the shed these electrons as radiation. The ocean is a sponge for radiation, as such if radioactive materials enter the water the electrons are striped and passed amongst the other H2O molecules until a balance is reached. Sunlight has more radiation in one day on the ocean than humans have ever produced in all our history.
As I said, the bits of old homes on the ocean with lead based paints are what trouble me. Not radiation.