Galen Winsor certainly didn't think so:

https://libertariannews.org/2012/06/27/man-eats-uranium-drinks-and-swims-in-reactor-water-ignites-plutonium-in-his-bare-hand/

In the video, you can watch Galen lick a pile of highly radioactive uranium off the palm of his hand and ignite a chunk of plutonium into a shower of flaming dust. The guy also drank reactor cooling pool water for fun and liked to go swimming in the pool to relax. He also spiked the basement flooring of his own home with enough radioactive material to send any Geiger counter reading off the scale to disprove the fear mongering surrounding radon at the time.