Among risky nuclear power stocks, one stock is less risky than most.Nuclear power stocks opened the post-holiday week broadly lower on Monday, with shares of Oklo (OKLO -7.83%) falling 6.3% through 10:45 a.m. ET, Constellation Energy (CEG -8.05%) down 6.5%, and Nano Nuclear Energy (NNE -9.62%) faring worst of all -- down 10.8%. Hydrogen power stocks are also suffering, with Plug Power (PLUG -14.71%) down 11.8%, one notable loser.And why? To learn the answer to that, you need to look back to the other side o ...