the design so i can't tell you how the controls worked. and you need power. >> that was ron carsmar, he helped develop all of the control panels and nuclear sensors inside that plant about 40 years ago. i'm going to bring in chad myers to explain what actually happens here when a nuclear reactor shuts down? >> to put some people's fear a little bit on the lesser state, any newer nuclear reactor that shuts down goes down all by itself, it cools down all by itself. you could literally take all the people in the control room and walk them away and it will cool down all by itself. this one started in 1967 and finished in 1971 did not have that capability. i asked couldn't you just retrofit that? and there's no possible way to