This speculative nuclear power stock might have a lot more upside potential.NuScale Power's (SMR -7.67%) stock closed at a record high of $51.67 on July 25. That marked a near five-bagger gain from its opening price of$10.70 after it went public by merging with a special purpose acquisition company (SPAC) on May 3, 2022.The speculative nuclear power stock has pulled back nearly 30% since then, but is it still worth buying? Let's review its business model, growth rates, and valuations to decide. How does Nu ...