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» Method to use cosmic rays to see through a reactor was developed

Japanese scientists have developed a method to use cosmic rays to see through a nuclear reactor, raising hopes for locating and accounting for melted fuel inside the Fukushima nuclear plant.

“Installing several sensors outdoors for a month or so is enough to get a picture of internal structures,” said Fumihiko Takasaki, a particle physics scientist at the High Energy Accelerator Research Organization. “Our technology is well established, so I hope it will be used to help decommission the stricken reactors at the Fukushima No. 1 nuclear power plant.”

The measurements allowed the scientists to outline the shape of the reactor containment vessel, locate the fuel storage pool and size up the amount of nuclear fuel being stored. The perspective images clearly showed the fuel was stored in two separate sections in the storage pool.

Each sensor unit weighs 800 kilograms, not including the steel sheets for shielding radiation, and costs around 20 million yen ($200,000).
<Media Report>
Scientists: Cosmic rays can see through nuclear reactor, locate fuel (Asahi Newspaper)

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