Fusion Power's Newest Problem Is People Secretly Making Nukes

Source: Gizmodo

Billions of dollars in venture capital and state investments have recently been poured into efforts to finally make nuclear fusion a viable energy source—big bets that a futuristic leap is coming soon, despite decades of premature prognostications.

Plenty of hurdles remain, of course, from engineering a system that can safely contain the literal power of a burning Sun to ensuring that such a system would be stable enough, consistently enough, for 24/7 use as an energy utility. Now, a particle physicist at Virginia Tech and physicists at Princeton have added a new hurdle to this race to crack fusion: How do we prevent rogue actors from secretly using their fusion plant to stockpile a nuclear arsenal?

Patrick Huber at VT’s Center for Neutrino Physics and Robert Goldston at Princeton’s Plasma Physics Laboratory zeroed in on this unintended consequence specifically for the case of deuterium-tritium (DT) fusion reactors. DT methods have shown great promise in U.S. government tests recently, tapping into a flow of energetic neutron particles created as its supply of hydrogen isotopes fuses into helium atoms. But those substantial neutron fluxes, Huber and Goldston noted, “could be used for covert production of fissile materials.”

“When operated in such a mode, a gigawatt scale fusion reactor could in principle produce tens of kilograms of plutonium or uranium-233 per week,” the researchers calculated in their new study, published Tuesday in the journal Physical Review Applied.

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Read more: https://gizmodo.com/fusion-powers-newest-problem-is-people-secretly-making-nukes-2000767859