Ive worked with 3 nuclear power plants, 2 submarines I was on when I was in the Navy and 1 land based nuclear power plant in Florida, and nuc power plants arent as expensive to run as the ratio of power it supplies. But even better are these submarines running off of the hydrogen fuelcell technology, especially when you can split H2O into Oxygen and store as much Oxygen you would need into large storage flasks, and Hydrogen into large fuel storage flasks or discharge either overboard underwater through the main seawater discharge. I think the Greek Navy is not telling us something, like they have an endless supply of hydrogen at there disposal through seawater and can operate for extended periods. The only backdraw is that Hydrogen vapors are very explosive around 8% and very corrosive to anything other than stainless steel and maybe copper (not sure).But I think since the U.S. always wants to be the "nice guys" and share our technology with everyone else I think "others" should share ther technology with us!