Cleaning up legacy radioactive waste from nuclear weapons production has been a daunting, lengthy, and expensive process.
The cleverly designed separation system resembles a series of hollow hockey pucks filled with rows of individual posts. Each row of descending posts is slightly offset from the row above. The team nicknamed it “pachinko” due to its resemblance to the popular game used at carnivals and on television game shows.
A small, slow stream — called laminar flow — is calm, steady, and predictable. As the flow becomes larger and faster — called turbulent flow — it starts to swirl. “Conventional wisdom said the system would work only on a smooth, laminar flow, but we proved it also works on turbulent flow,” Minette said.
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