LONDON — Surging power demand has reignited interest in nuclear energy, but vast capital requirements and an uncertain political and regulatory climate raise questions about the sector's fiscal capacity.

Tech giants are pumping money into nuclear energy investments , looking to power energy-intensive data centers and realize their AI ambitions.

AI and data centers are the "canary in the coal mine," World Nuclear Association Director General Sama Bilbao y León told CNBC ahead of the conference. "We are finally recognizing that the demand of electricity and energy in general is only going to increase. But the reality is that all sectors of the economy are going to need more electricity."

In addition to AI, applications range from nuclear energy for the metallurgical industry, which is l

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