View Single Post
Old September 17 2012, 03:21 PM   #148
Re: Envisioning the world of 2100

Like I said, whatever works, whatever off the shelf commercially available nuclear reactor at the end of the 21st century, I admit I am not a nuclear engineer, but I know about nuclear power plants, and the Fusion program just seems to be soaking up money and their progress is so slow with them talking multiple decades just to build an experimental reactor the ITER, and multiple decades more to build a commercial power plant with what was learned. I think if we are to do a starship by the end of this century, it could only reliably count on atomic fission as its main power source, I've calculated by the way it would take 1000 metric tons of fissionables to light and heat a 500 meter diameter Island One Bernal Sphere habitat for every 1000 years of the journey, and at 300 km/sec, that journey to Alpha Centauri would take 4100 years, because Alpha Centauri is approaching us, so figure 4100 metric tons of fusion fuel for lighting and heating the habitat.
Mars is offline   Reply With Quote