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Nuclear Test Risks Blowing Lid Off U.K.’s Plan to Keep Lights on

Builders of the U.K.’s first nuclear plant in two decades are about to take a vital component and break it.

The 110-ton spherical steel lid was destined to sit atop a reactor at the Hinkley Point site in Somerset. Instead it will be sacrificed to test the strength of a part already welded in place at similar atomic projects in France and China.