Physical Insights

An independent scientist’s observations on society, technology, energy, science and the environment. “Modern science has been a voyage into the unknown, with a lesson in humility waiting at every stop. Many passengers would rather have stayed home.” – Carl Sagan

Mini nuclear plants to power 20,000 homes.

with one comment

Here’s a nice little article from The Guardian, discussing the small-scale nuclear energy technology of Hyperion Power Generation.

“Nuclear power plants smaller than a garden shed and able to power 20,000 homes will be on sale within five years, say scientists at Los Alamos, the US government laboratory which developed the first atomic bomb.”

The miniature reactors will be factory-sealed, contain no weapons-grade material, have no moving parts and will be nearly impossible to steal because they will be encased in concrete and buried underground.

The US government has licensed the technology to Hyperion, a New Mexico-based company which said last week that it has taken its first firm orders and plans to start mass production within five years. ‘Our goal is to generate electricity for 10 cents a watt anywhere in the world,’ said John Deal, chief executive of Hyperion. ‘They will cost approximately $25m [£13m] each. For a community with 10,000 households, that is a very affordable $250 per home.’

Deal claims to have more than 100 firm orders, largely from the oil and electricity industries, but says the company is also targeting developing countries and isolated communities. ‘It’s leapfrog technology,’ he said.

The company plans to set up three factories to produce 4,000 plants between 2013 and 2023. ‘We already have a pipeline for 100 reactors, and we are taking our time to tool up to mass-produce this reactor.’

The first confirmed order came from TES, a Czech infrastructure company specialising in water plants and power plants. ‘They ordered six units and optioned a further 12. We are very sure of their capability to purchase,’ said Deal. The first one, he said, would be installed in Romania. ‘We now have a six-year waiting list. We are in talks with developers in the Cayman Islands, Panama and the Bahamas.’

The reactors, only a few metres in diameter, will be delivered on the back of a lorry to be buried underground. They must be refuelled every 7 to 10 years.

Because the reactor is based on a 50-year-old design that has proved safe for students to use, few countries are expected to object to plants on their territory.

[I think they’re referring to the uranium-zirconium-hydride fuel of the TRIGA reactor – though I might be wrong. There are few other examples of hydride-fuelled reactors that I can think of. Incidentally, this year is the 50th anniversary of the deployment of the first Mk. I TRIGA research reactor – a great piece of nuclear engineering, of which some examples remain in useful, productive, safe use to this day. – Luke]

An application to build the plants will be submitted to the Nuclear Regulatory Commission next year.

‘You could never have a Chernobyl-type event – there are no moving parts,’ said Deal. ‘You would need nation-state resources in order to enrich our uranium. Temperature-wise it’s too hot to handle. It would be like stealing a barbecue with your bare hands.’

Other companies are known to be designing micro-reactors. Toshiba has been testing 200KW reactors measuring roughly six metres by two metres. Designed to fuel smaller numbers of homes for longer, they could power a single building for up to 40 years.

Current cost projections for Hyperion’s 25 MWe generators are extremely promising. 25 million dollars for 25 MWe is the equivalent of a two-billion-dollar price tag for a conventionally sized nuclear power plant, with two 1000 MW LWRs. Current cost projections for construction of new LWR plants of that size are significantly greater than that, making Hyperion’s systems (and those of other small-nuclear suppliers) look to have great potential.

Written by Luke Weston

November 10, 2008 at 6:37 am

One Response

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  1. First, if the reactor is encased in concrete to make it hard to get at, how do you access the depleted fuel to dispose of it? Secondly, how long is the fuel a hazard, and how do you propose to dispose of it?

    Doug F.

    October 5, 2009 at 7:46 pm


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