Thorium Powered Cars: A Million Miles Without Refuelling

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Thorium could be used as car fuel

Thorium could be used as car fuel

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It reads more like a 1950s space race vision of the future than a pragmatic 21st Century theory, but we could now be a step closer to driving a nuclear-powered car.

In light of the recent events in Japan following the tsunami that caused meltdown at the Fukushima nuclear plant, and previous events such as Chernobyl and Three Mile Island, the thought of nuclear power even powering our homes has left many people apprehensive, let alone the vehicles we drive every day.

Laser Power Systems in Connecticut is exploring a safer alternative. Thorium is a lightly radioactive heavy metal thought to be fairly common throughout the world. As with other nuclear fuels it's incredibly dense and as such stores incredibly high potential energy. Charles Stevens, CEO and chairman at Laser Power Systems, says that a single gram of thorium equals the energy of 7,500 gallons of gasoline.

This presents an intriguing prospect.

A car powered by as little as 8 grams of thorium would never need refueling.

Laser Power Systems uses a high intensity laser to heat thorium, exciting the molecules to a point where the element gives off considerable heat. This is then used to create steam from water, which drives mini-turbines. The electricity generated would be used to power the car. In effect, your car would have its own power station under the hood, and Stevens thinks it could weigh as little as 500 lbs.

1958 Ford Nucleon concept car

1958 Ford Nucleon concept car

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Ford Nucleon

If you're thinking, "Hasn't someone already suggested nuclear powered cars?", you'd be right.

Back in 1958 the Ford Motor Company created a scale model car known as the Ford Nucleon, designed to illustrate how a nuclear-powered car may look. It was an ungainly beast with at least half its overall length occupied by an imposing nuclear reactor.

The Nucleon's reactor would have used uranium fission, similar to how nuclear submarines work. Steam produced by heat from the reaction would drive two turbines - one to drive the car and another to generate electricity. Designers suggested the car could travel around 5,000 miles before it needed refueling.

The huge downside of uranium is its instability, radioactivity and potential for use in weaponry, making it an element you wouldn't really want to see in abundance in your neighborhood.

Safety of thorium

Thorium is much safer. It only emits alpha radiation, which is weak enough that it can't penetrate human skin - and even less so in the tiny quantities that would be required in cars. The thorium car's 3-inch thick stainless steel container would be more than sufficient to prevent radioactive emissions.

It's also incredibly difficult to turn it into weapons-grade material, so having it freely accessible in cars doesn't present a terrorist risk.

It has other benefits too. It's as common as lead and far more abundant than uranium in the Earth's crust. The U.S. Geological Survey estimates that the U.S. has reserves of 440,900 tons of thorium, Australia over 300,000 tons and India between 319,000 and 716,000 tons - and with every car needing only 8 grams to power it for life, that's a huge potential fuel source.

With reserves that great, it would also make the U.S. energy self-sufficient. Oil demand would tumble and the remaining demand would be for asphalt road surfacing, plastics, lubricants and natural gas. 

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Comments (10)
  1. Cold starts could be handled via a volt-esque style small battery with 10 miles range to give the laser time to heat things up. Simply replace the internal combustion engine with a thorium generator.

  2. Based on the theoretical use of a thorium generator, the larger picture would to advance the system towards heavy industry and trains. That could be the door opener to public acceptance and eventually reducin' the size requirements to fit smaller vehicals.

  3. Given the stability, why not use the laser thorium system for energy generation plants instead of uranium?

  4. I suspect that the outright energy yield for thorium is below that of uranium, making uranium more suitable for generating electricity on a large scale. Thorium doesn't naturally settle into nuclear chain reaction either so would require more energy input in order to start a reaction.

  5. Great, I was hoping we could eliminate all these fossil fueled SUV behemoths that are polluting our air and water and killing us with their noxious emissions.

    We'll all feel much safer when we see people cruising the highways in four wheeled fission reactors with CD players blaring while texting their friends and munching Big Macs.

    They must be really safe though if they only need to be contained by three inches of stainless steel.

  6. You know that the oil companies and politions would prevent this from happening. It is a matter of BUCK$.

  7. What a bunch of BS. Just from high school physics of 40 years ago, I know this is total nonsense.

    Is this a precursor to a pump and dump investment scheme?

  8. Thorium has considerable ability to operate as a much safer nuclear power source than Uranium. However the only way to actually get power out of it would be for it undergo nuclear fission, there is no other source of energy unless you are burning it into an oxide, and that would not produce much energy. Heating it up will not provide the neutrons necessary for reaction so that also seems very bogus.

    All in all this reeks of fraud, as there is no source of energy other than the laser that takes in more energy than it puts out. That makes this a glorified perpetual motion device with a a bit of smoke and mirrors hiding what they are doing. It will probably get quite a bit of investors for what can only be a Ponzi scheme.

  9. It is really too bad that his is a fraud. If it was real you could set one up in any house and sell more electricity than you use with none of the concerns about weight or transport, or make million mile yachts and travel the world. Trying to cram the idea into sports cars further screams that this is fraud jumping onto a sexier investment than household power or nuke yachts.

  10. What if we'll use Thorium in trains and other major transportation system not in car. The car is risky and prone accident especially collision. This is a great savings for green house gases.

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