Work has already begun on what will become the closest-ever nuclear reactor to Green Country. Developers told 2 News it will bring not only electricity to Oklahomans, but job potential.Deep Fission is the company building a test reactor by 2027 at Great Plains Industrial Park, an economic competitor of Mid-America Industrial Park in Pryor. Deep Fission is contracted with the U.S. Department of Energy's Reactor Pilot Program, announced last year,…