This lecture covers various topics in nuclear engineering, including reactor technology, nuclear physics, fuel cycle, reactor physics, thermal hydraulics, radiation protection, nuclear safety principles, design basis accidents, Generation-IV reactors, Fukushima event analysis, and waste treatment. The instructor discusses key factors in the Fukushima accident progression, safety systems, and containment design. The lecture also explores the Chernobyl accident, reactor core meltdown, fission product release, and the long-term consequences. The session concludes with a wrap-up covering reactor kinetics, nuclear safety principles, design basis and beyond design basis accidents, and the importance of safety measures in nuclear engineering.