Ocean Power also plans try out its system off the coast of Oregon, and has a preliminary permit from the U.S. Federal Electrical Regulatory Commission to build a 50-megawatt station on the site.

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Although one company - ITV plc - now owns all the regional stations based in England and Wales, some aspects of the regulatory system date back to the days when each station in the network was a distinct entity.

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The company also still intends to move forward with plans to request regulatory approval to build a third reactor at its nuclear power station in Louisa County, Va.

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