New research (more accessible) suggests that Boron-Hydrogen fusion may be viable, and doesn't leave behind a radioactive reactor.
our simulations show for example that 14 milligram HB11 can produce 300 kWh energy if all achieved results are combined for the design of an absolutely clean power reactor producing low-cost energy.
Now where did I leave my petawatt lasers?
(Score: 2) by Immerman on Sunday December 17 2017, @03:26PM
A joke of the saddest sort, since if you measure it in terms of progress per dollar, it has been proceeding roughly in line with initial projections when the "20 years away" claim was first made. Unfortunately, funding has been declining steadily since then so that at any moment it pretty much always remains 20 years away at the then-current funding levels.
If you were feeling especially cynical you might even suspect that the purse strings were being controlled by someone(s) with a vested interest in making fusion into a running joke.
On the bright side, the slowly vanishing funding for tokamak fusion has inspired many other groups to make impressive progress on various shoestring-budget alternative fusion technologies that could be deployed in a much more distributed fashion - though even that tends to suffer from ever-diminishing budgets. For example there's my personal favorite: the late Dr. Bussard's Polywell fusion team, now EMC2, sounds like it had reached the point where they are ready to build a full-scale (10m diameter) net-positive reactor. And, judging from the trickle of publicly available information from their last progress reports while funded by the NAVY, the prototypes have likely already successfully demonstrated aneutronic p-B fusion in addition to the much easier D-T fusion.