Symposium HH, "Advances in Materials for Nuclear Energy," was held Nov. 25-30 at the 2012 MRS Fall Meeting in Boston, Massachusetts. As the world faces steadily rising energy demand and cost, nuclear energy produced by fission and fusion reactors is increasingly recognized as an economically viable and carbon-neutral alternative to fossil energy sources. With new reactor concepts pursuing passive safety mechanisms and better performance, the behavior of structural materials and fuel is at the forefront of challenges in the development of promising reactor ideas. Accordingly, the research and...