Sure, but you won't solve excessive ambient radiation by running a stress test on your RAM.

A small radioactive («hot») dust particle will not change average radiation level a lot, but may cause problems with memory/cpu. Simple cleaning, by blowing dust out, fixes it. Saw that dozen of times, but years ago.

Did you use a geiger counter to verify the dust was hot? Would something large enough to cause problems with the ram be large enough to detect?

er.. you should probably move. Bitflips aren't the only things radiation does. Bitflips in DNA for example.

Too late, radiation is returned back to almost natural level (about 30% higher than natural). I have detector of radiation, so I can measure it myself. Sometimes wind can bring some radioactive dust from Chornobyl, e.g. after forest fire, but it is much less dangerous.