How many square feet of solar panel is needed to replace the Vermont Yankee Nuclear Power Plant?

A lot! The US Energy Information Administration says that the Vermont Yankee has a capacity of 620 megawatts during the summer. To generate 5 megawatts of solar power requires a solar farm about 30-35 acres large. Since 620 divided by 5 is 124, you would need 124 x 30 acres of solar plants. That comes to a total of 3,720 acres! One acre is 43,560 square feet. This means that it would require 162,043,200 square feet of solar farm to replace the facility which takes up less than one acre. And that's based on the low estimate.

If you are looking for alternatives to the Vermont Yankee, I suggest you look elsewhere, because solar won't do it in Vermont.