The Hinkley Point rounders team, Power Rounders, won the coveted Somerset Activities & Sports Partnership (SASP) Workplace Rounders Tournament.
They competed against nine other teams at the event at Bishop Foxes School in Taunton.
Power Rounders enjoyed an unbeaten run of four games, with three wins and a draw.
They are a team comprised of 15 workers from Hinkley Point B and C.
Nicola Fauvel, Hinkley Point B's acting station director, said: "I am absolutely delighted that our rounders team won the tournament, and I would like to thank all of the team members for their impressive sporting efforts.
"It's always good to see both Hinkley Point B and Hinkley Point C working so closely together, and playing an active part in the community."
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