All of these designs are great... but sadly we are still lacking half of the fuel needed for any fusion roll-out. All of these designs require two different types of hydrogen isotopes as fuel deuterium and tritium. We have a practically unlimited amount of deuterium in the oceans but tritium must be manufactured by neutron capture from lithium.
And this is the problem, tritium has a half-life of 12 years. Itâ(TM)s radioactive, itâ(TM)s VERY difficult to contain. And we donâ(TM)t have enough to run power plants. Now itâ(TM)s possible to wrap the a fusion reactor with Lithium to be converted into Tritium. But the amount that can made in this manner is only slightly more than what is burned to generate the flux needed to convert Lithium.
I saw a projection assuming we had a functional 1GW fusion power plant today; and we loaded the ALL of the worlds supply of Tritium into that reactor we would have enough to Tritium run that single plant for about a year. And at the end of that year assuming a good conversion rate you would have about 125-150% of the Tritium you started with. This would prevent any large deployments of fusion plants. They concluded that even after 10 years you wouldnâ(TM)t have the Tritium for more than 10-15 1GW Power plants. Assuming that you would build additional plants once you had fuel for them.
Also, they concluded that itâ(TM)s was likely impossible for a Tritium fueled fusion plant to prevent significant leakage of Tritium. As Tritium is radioactive and easily incorporated in living tissue such a power plant would be violating current laws for Nuclear plants.
I am not saying that we shouldn't be working on fusion power. But we arenâ(TM)t going to have unlimited fusion power anytime soon...