Wait, are you worried about radioactivity of your keyboard? You do realize, unless you're practically on top of the reactor site, you get about the same levels of radiation from being in a basement, right?
Hell, riding an airplane is significantly more, even.
Just for reference, all three situations are very little radiation.
Also, in a funny note, eating a banana can nearly triple your personal radioactivity. Every person has, on average, a few decay events per minute. Eating a banana increases this due to the potassium, which is often of the unstable variety. You can get yourself all the way to 10 counts per minute just by eating 2 bananas in the morning.