[jhartmann]

There is absolutely no reason to store anything for 100,000 years. If we were sane and reprocessed our fuel (like France), something like 400-500 years would put us below standard ambient radiation levels. Still a long time, but no we don't need to store anything for 100k years. Remember, almost all the long lived Transuranics are generally usable as further fission fuel. The other Transuranics and fission by products will typically decay rapidly to something stable or barely radioactive within a reasonable timeframe.