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The Infinite Monkey Cage

Fusion – Ria Lina, Yasmin Andrew and Howard Wilson

42 min episode · 2 min read
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Howard Wilson,Ria Lina,Yasmin Andrew

Episode

42 min

Read time

2 min

Topics

Productivity, Design & UX, Product & Tech Trends

AI-Generated Summary

Key Takeaways

  • Fusion fuel efficiency: One bathtub of seawater deuterium combined with lithium from one to two laptop batteries provides enough fusion fuel to generate an entire human lifetime's electricity needs, demonstrating the extraordinary energy density of fusion reactions.
  • Plasma confinement complexity: Fusion plasma turbulence requires solving six-dimensional problems tracking particle position and velocity in three dimensions each. Without plasma turbulence, fusion would have worked decades ago, making it the primary technical barrier to commercial deployment.
  • Magnetic field breakthrough: High-temperature superconducting coils developed since the 1980s now enable much stronger magnetic fields on tokamaks, directly improving plasma confinement. This technology took thirty years from discovery to practical application in fusion reactors.
  • STEP timeline projection: UK's spherical tokamak at West Burton will begin operations in 2040, delivering hundreds of megawatts to the grid. Commercial fusion plant fleets will be designed during the 2040s, with first commercial plants coming online in the 2050s.

What It Covers

Nuclear fusion energy development faces plasma turbulence challenges requiring 200 million degree temperatures and magnetic confinement. UK's STEP reactor targets 2040s grid connection, with commercial plants potentially arriving in 2050s using seawater deuterium and lithium fuel.

Key Questions Answered

  • Fusion fuel efficiency: One bathtub of seawater deuterium combined with lithium from one to two laptop batteries provides enough fusion fuel to generate an entire human lifetime's electricity needs, demonstrating the extraordinary energy density of fusion reactions.
  • Plasma confinement complexity: Fusion plasma turbulence requires solving six-dimensional problems tracking particle position and velocity in three dimensions each. Without plasma turbulence, fusion would have worked decades ago, making it the primary technical barrier to commercial deployment.
  • Magnetic field breakthrough: High-temperature superconducting coils developed since the 1980s now enable much stronger magnetic fields on tokamaks, directly improving plasma confinement. This technology took thirty years from discovery to practical application in fusion reactors.
  • STEP timeline projection: UK's spherical tokamak at West Burton will begin operations in 2040, delivering hundreds of megawatts to the grid. Commercial fusion plant fleets will be designed during the 2040s, with first commercial plants coming online in the 2050s.

Notable Moment

Scientists revealed that fusion reactors in Oxfordshire reach 200 million degrees, making them the hottest locations in the entire solar system. This temperature is ten times hotter than the sun's core, necessary because Earth lacks the sun's gravitational compression advantage.

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Episode Transcript

This BBC podcast is supported by ads outside The UK. Make their holiday unforgettable with a gift that says it all from Pandora Jewelry. A gift that tells a story and shows you know theirs. That doesn't just sparkle, but speaks. From new festive charms to forever rings and personal engravings. This season, give a gift that's perfectly theirs. Whether you're shopping for a shiny surprise for your significant other, matching bracelets to celebrate your friendship, or a heartfelt gift for a family member, say more this holiday season with Pandora. Shop now at pandora.net or visit your closest Pandora store. Okay. Only 10 more presents to wrap. You're almost at the finish line. But first there. The last one. Enjoy a Coca Cola for a pause that refreshes. Hello. I'm Brian Cox. I'm Robin Ince, and this is the infinite Mankish Cage. Because today, we are in Manchester, which is home, in case you don't know, to some of Brian's favorite childhood bus routes. Those of you who are regular listeners will know before Brian started getting involved with the stars, he was an avid bus spotter. So what was your favorite? You're coming in from Oldham. You got you put on all your kind of Robert Smith makeup. Perhaps you're going to Gilly's Rock World. No. Not going to Gilly's Rock World. The Cloud Nine in Berlin, it was. And it was the 24 bus, by the way, that went from Chatterton to Manchester Piccadilly Bus Station. What was it about the 24 that really impressed you? It was the bus that went where I wanted to go from. Today, we're asking nuclear fusion, when will it be ready? What makes fusion reactors so hard to build when the sun built itself using only gravity? What are the breakthroughs we're waiting for? To help us understand the challenges, the innovations, and the future benefits, we are joined by a fusion scientist with an interest in magnetic confinement, a plasma scientist with an interest in spherical tokamak innovations, and a forensic comedian with an interest in viruses and puns. And they are. My name is Howard Wilson. I'm the director of science and technology at UK Industrial Fusion Solutions, which is the organization that's leading the delivery of the of STEP. STEP is the spherical tokamak for energy production, UK's first fusion pilot plant here on Earth. I started infusion in 1988 and about six months later, there was the announcement of cold fusion. We were asked to give an example of what of of what we think is a crazy energy source, and I would put cold fusion in that box. I'm Yasmin Andrew, and I'm a senior teaching fellow at Imperial College London. I'm a plasma physicist, and I've been working on, magnetic confinement fusion for the last thirty years. Do you want the unusual energy source? Yeah. Yes. So this is more strange with this idea of sending a satellite into space while just above Earth …

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