The Formula: Guardians Of

They lowered the rods.

While his colleagues collapsed from Acute Radiation Syndrome (ARS), Popović began writing the differential equations for neutron transport. He wasn’t being cold; he was being precise. Guardians of the Formula

In a split second, he brought two pieces of fissile material too close together. The room flashed a deep, eerie blue—the telltale Cherenkov radiation of a reactor going prompt critical. They lowered the rods

The reactor was safe. The mathematics worked. The city of Belgrade—a million people—never knew how close they came to a disaster that would have rivaled any Soviet incident. Guardians of the Formula