Science: Trick with Mirrors

The Atomic Energy Commission usually hates to tell about accidents to nuclear reactors. Reason: the public gets so jumpy. But about the latest such accident it not only lifted secrecy but has made a color motion picture snowing the tricky and dangerous work of repairing a reactor at Oak Ridge, Tenn. The film shows dozens of scientists and technicians working for nine months to patch two small holes that had been burned in the 5/16-in. zirconium shell of the reactor's fiercely radioactive core.

This was no work for amateurs or bunglers. To gain access to the heavily shielded core vessel, high-density concrete...

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