Physicist plans to karate-chop them with super-fast blasts of light.
- Gérard Mourou has already won a Nobel for his work with fast laser pulses.
- If he gets pulses 10,000 times faster, he says he can modify waste on an atomic level.
- If no solution is found, we’re already stuck with some 22,000 cubic meters of long-lasting hazardous waste.
Whatever one thinks of nuclear energy, the process results in tons of radioactive, toxic waste no one quite knows what to do with. As a result, it’s tucked away as safely as possible in underground storage areas where it’s meant to remain a long, long time: The worst of it, uranium 235 and plutonium 239, have a half life of 24,000 years. That’s the reason eyebrows were raised in Europe — where more countries depend on nuclear energy than anywhere else — when physicist Gérard Mourou mentioned in his wide-ranging Nobel acceptance speech that lasers could cut the lifespan of nuclear waste from “a million years to 30 minutes,” as he put it in a followup interview with The Conversation.
Who is Gérard Mourou?
Mourou was the co-recipient of his Nobel with Donna Strickland for their development of Chirped Pulse Amplification (CPA) at the University of Rochester. In his speech, he referred to his “passion for extreme light.”
CPA produces high-intensity, super-short optical pulses that pack a tremendous amount of power. Mourou’s and Strickland’s goal was to develop a means of making highly accurate cuts useful in medical and industrial settings.
It turns out CPA has another benefit, too, that’s just as important. Its attosecond pulses are so quick that they shine a light on otherwise non-observable, ultra-fast events such as those inside individual atoms and in chemical reactions. This capability is what Mourou hopes will give CPA a chance of neutralizing nuclear waste, and he’s actively working out a way to make this happen in conjunction with Toshiki Tajima of UC Irvine. As Mourou explains to The Conversation:
While 15 years may seem a long time, when you’re dealing with the half-life of nuclear waste, it’s a blink of an eye.
Nuclear waste in Europe
Although nuclear energy struggles for acceptance as an energy source in the U.S. after a series of disturbing incidents and the emergence of alternative sources such as solar and wind energy, many European nations have embraced it. France is chief among them, relying on nuclear energy for 71% of its energy needs. Ukraine is the next most dependent on it, for 56% of its power, followed closely by Slovakia, then Belgium, Hungary, Sweden, Slovenia, and the Czech Republic, according to Bloomberg. None of them have a good plan for nuclear waste, other than storing it somewhere in hopes of an eventual solution or thousands of trouble-fee years during which it stays put and doesn’t escape into water supplies or the air.
And there’s a lot of this stuff. Greenpeace estimates there are roughly 250,000 tons of it in 14 countries across the world. Of that, about 22,000 cubic meters is hazardous. The cost of storing it all, according to GE-Hitachi, is more than $100 billion, (discounting China, Russia, and India).