Both of these companies are loved by investors, but are trading at premium prices.Nuclear energy has entered a renaissance. Through a confluence of factors such as rising electricity demands from data centers, government initiatives, and just plain old realizations that this is the safest and cleanest energy technology that we know of, nuclear energy projects are making a comeback. Some start-ups are trying to take advantage of this trend, and their stock prices are soaring.Enter NuScale Power (SMR 6.07%) a ...