Abstract
David T. Hobbs is an expert in the complicated chemistry of nuclear waste management. He’s studied nuclear waste materials, radiochemical separations, and complex chemical environments for more than three decades. But three years ago, when an accident in a New Mexico repository brought disposal of U.S. defense nuclear wastes to a standstill, he was called to investigate a different kind of material—cat litter. Hobbs, who doesn’t own a cat, is one of the researchers who studied the nuclear waste mixture that in 2014 led to a drum failure and radiological release at the Waste Isolation Pilot Plant (WIPP) near Carlsbad, N.M. The accident shut down the facility for three years. It was ultimately traced to an unorthodox sorbent, an organic cat litter called sWheat Scoop, that was used in error to prepare the nuclear waste for disposal at WIPP. After a 33-year tenure, Hobbs retires this month from Savannah River
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