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Washington’s Center for Strategic and International Studies said satellite imagery of North Korea’s Yongbyon nuclear site from 12 April showed five specialised railcars near its uranium enrichment facility and radiochemistry laboratory.

Work continues daily in the country’s radiochemistry lab near Yongbyon, where plutonium for new bombs is extracted from spent fuel rods.

Graduate students in WSU’s radiochemistry program typically have their tuition paid for, and they’re coveted by employers before they even graduate, Wall said.

In no time, Seaborg became one of the Rad Lab’s reigning radiochemistry experts while also serving as Lewis’s personal research assistant.

Cat litter has been used for decades in radiochemistry labs and nuclear facilities to stabilize certain radwastes, like liquid scintillation solutions, evaporator bottoms, and other materials that have nitrate salts in solution.