Fusion Energy on Grid by 2030, Says MIT Scientist


From sciencealert.com
In the continuous pursuit of a truly renewable and clean energy source, nothing compares to nuclear fusion. Although scientists have already found ways to harness the energy from the reaction that powers stars, it hasn’t been an easy feat.

Despite the advances in research pertaining to nuclear fusion, there still isn’t a stable – not to mention cost-efficient – way to power the electric grid with it.

According to the head of MIT’s Alcator C-Mod tokamak fusion project Earl Marmar, we may not have to wait long.

Speaking to Inverse, Marmar said that we could potentially have nuclear fusion powering electric grids by the 2030s – that is, if we’re dedicated to continued research.

“I think fusion energy on the grid by 2030 is certainly within reach by this point,” Marmar said. “2030 is probably aggressive, but I don’t think it’s wildly out of range.”

This would be a timetable similar to what a Canadian collective is currently working towards.

The physics of nuclear fusion is actually something we understand pretty well at this point and it isn’t too hard to explain. At the most basic level, it’s the reverse of nuclear fission.

In other words, instead of splitting atoms to release energy in fission, nuclear fusion combines small hydrogen atoms into a plasma that produces energy.

In fact, that plasma produces several times more energy than what fission produces. This can’t just happen anywhere, though: it requires an environment with temperatures over 30 million degrees Celsius.

MIT’s tokamak reactor – named for its donut-shaped chamber – is no longer active. But, its more than 20 years of experience in fusion technology has left us with enough data to figure out how to sustain fusion reaction.

That’s what we still don’t understand about using fusion: not knowing how to sustain is the only thing holding us back, according to Marmar.

“So we know that fusion works; we know that the nuclear physics works. There are no questions from the nuclear physics,” he explained. “There are questions left on the technology side.”

There have been solutions proposed to stabilise nuclear fusion, many of which are currently in the works.

Marmar mentioned two of them in his interview: Tokamak Energy in the UK opted to decrease the size of the donut hole in their reactor to harness more plasma. [….]

Read more at: http://www.sciencealert.com/mit-scientist-asserts-that-we-will-have-fusion-energy-by-2030

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