Caption: Passionate about addressing climate change, W. Robb Stewart is working to build a modular, integrated, gas high-temperature nuclear reactor, called MIGHTR. “I wanted to be able to look back at the point of retirement and say I dedicated my engineering time and knowledge to this big problem,” he says. Credits: Photo: Gretchen Ertl Next image If nuclear energy is to play a pivotal role in securing a low-carbon future, researchers must not only develop a new generation of powerful and cost-efficient nuclear power plants, but provide stakeholders with the tools for making smart investment choices among these advanced reactors. W. Robb “Robbie” Stewart, a doctoral candidate in the MIT Department of Nuclear Science and Engineering (NSE), is working on both these problems.