At the nation’s top nuclear weapons labs and plants, safety mishaps have imperiled life and limb, and hindered national security operations. This Scientific American story is part of a one-year investigation by reporters at the Center for Public Integrity that reveals many problems and little accountability. In addition to the Nevada accidents, a near-fission calamity in 2011 at Los Alamos National Laboratory in New Mexico led to an exodus of nuclear safety engineers and a four-year shutdown of operations crucial to the nation’s nuclear arsenal. Yet penalties for these incidents were relatively light, and many of the firms that run these facilities were awarded tens of millions of dollars in profits—or even new contracts—after major safety lapses occurred.
Not a clue.
The government scientists didn’t know they were breathing in radioactive uranium at the time it was happening. In fact, most didn’t learn about their exposure for months, long after they returned home from the nuclear weapons research center where they had inhaled it.
The entire event was characterized by sloppiness, according to a quiet federal investigation, with multiple warnings issued and ignored in advance, and new episodes of contamination allowed to occur afterward. All of this transpired without public notice by the center.
Here’s how it happened: In April and May 2014, an elite group of 97 nuclear researchers from as far away as the U.K. gathered in a remote corner of Nye County, Nev., at the historic site where the U.S. had exploded hundreds of its nuclear weapons. With nuclear bomb testing ended, the scientists were using a device they called Godiva at the National Criticality Experiments Research Center to test nuclear pulses on a smaller and supposedly safe scale.
But as the technicians prepared for their experiments that spring—under significant pressure to clear a major backlog of work and to operate the machine at what a report called Godiva’s “upper energy range”—they committed several grievous errors, according to government reports.
The machine had been moved to Nevada nine years earlier from Los Alamos, N.M. But a shroud, descriptively called Top Hat, which should have covered the machine and prevented the escape of any loose radioactive particles, was not reinstalled when it was reassembled in 2012.
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