That's still peanuts compared to coal. Largest plant had 18 billion kgs of CO2 released last year. 2000 * 23,900 = 47.8 million kg of CO2 equivalent. Obviously the prior calculation also depends on plant size, etc.
According to the Intergovernmental Panel on Climate Change, SF 6 is the most potent greenhouse gas that has been evaluated, with a global warming potential of 23,900 times that of CO 2 when compared over a 100-year period.[37] Sulfur hexafluoride is inert in the troposphere and stratosphere and is extremely long-lived, with an estimated atmospheric lifetime of 800–3,200 years.