Nuclear energy is enjoying a resurgence. Some nations are deferring the retirement of reactors and other countries are developing new generation fission designs that are safer and more cost-effective than current technology. By retrofitting existing coal-fired power plants, new small modular reactors, or SMRs, are at the forefront of this development. Want to watch this podcast as a video? This Week in Engineering is available on engineering.com TV along with all of our other shows such as End of the Line, Designing the Future, Manufacturing the Future, and the Engineering Roundtable.