(Bloomberg) — A developer of advanced nuclear systems backed by Sam Altman has more than doubled in value this week as investors rushed to pile into companies associated with the power industry.Most Read from BloombergA Broken Oil Pipeline Plunges South Sudan’s Capital Into ChaosInside the ‘Utopias’ of Mexico CityCities Look to AI to Flag Residents’ Trash and Recycling MistakesOne City’s Plan to Re-Link a Neighborhood That Robert Moses DividedDrug Decriminalization Spawns a Political Debacle fo