The day of transportable, refrigerator-size nuclear reactor nears

a small or large reactor, the hoops you have to jump through are the same,” said Hans-Holger Rogner, head of economic planning at the International Atomic Energy Agency. “You open up a Pandora’s Box of intervention from society every time you try to build any kind of nuclear plant.”

Environmentalists are concerned the small reactors would pose the same risk of leaking radioactive materials as their larger counterparts, said Jan Beranek, nuclear energy project leader at Greenpeace International in Amsterdam. “Terrorists could hijack a reactor and directly use it to cause a meltdown or use it to fabricate fissile materials for later use in a weapon,” Beranek said.

Deal rejects those concerns, noting his units are designed to fit in the same canisters used to transport nuclear fuel for bigger plants around the world.

The power-producing core of Hyperion’s reactor comes in multiple sealed chambers, which would contain any leak. The entire unit would be installed in an underground vault to protect it from tampering and natural threats, the company says.

“You still have to have guards and dogs, but you have to do that with a grocery store in some countries,” Deal said.

Approval needed

So far, no manufacturer has sought certification for any small reactor, according to the U.S. Nuclear Regulatory Commission (NRC). Formal approvals would probably take three to five years, the same as for bigger reactors, said Scott Burnell, a spokesman for the commission.

Van Loon and Morales note write that small reactors have been used in U.S. submarines since the USS Nautilus was commissioned in 1954. Russia’s Rosatom Corp. is using its experience on submarines and icebreakers to develop atomic plants for floating barges.

Hyperion’s technology was invented at the U.S. government’s Los Alamos National Laboratory in New Mexico. Six other reactor designs are in information-sharing stages, including ones from NuScale Power Inc., Toshiba and its Westinghouse unit.

Potential customers

Westinghouse has been developing small reactors since 1999, imagining customers in “lesser developed” countries and from small industry and utilities, Michael Anness, manager of the company’s Advanced Reactors, Research and Technology division, said in an e-mailed response to questions.

Toshiba, based in Tokyo, is working on reactors that would produce 10 megawatts and 50 megawatts, called 4S for “super- safe, small and simple.” It will apply later this year for U.S. approval to test the unit in the village of Galena in central Alaska, said company spokesman Keisuke Ohmori.

Galena has no connection to power lines and is closed to barge traffic for supplies for more than half the year when the Yukon River freezes. To provide heat and electricity, the town relies on diesel fuel, whose price has risen by about 48 percent in the past 12 months. “We aim to get 4S orders in remote areas where it is more cost-efficient to generate power on a local basis than use power grids,” Ohmori said. “A great many people are interested.”

Both Toshiba and Hyperion are designing reactors that would run about five times longer without servicing than the 18 to 24 months typical at utility plants.

Gates connection

Toshiba signed an agreement in November with TerraPower, controlled by Microsoft Corp. founder Bill Gates, to exchange design and engineering know-how. In February Gates said a small-scale pilot project needed “several billion” dollars.

Deal, a licensed Christian minister and self-confessed “left-wing nutbag” who only began to support nuclear power four years ago, says the simplicity and scale of his reactor can overcome concerns about waste and terrorism. “Attitudes change,” said Deal, 46, who is working at his sixth start-up company in twenty years after previous roles at spy satellite technology and wind power businesses. “There’s not a lot of people out there railing against nuclear power.”