An investigation has concluded that a security officer at the Y-12 National Security Complex probably inadvertently pulled the trigger when a weapon fired inside a “hardened” vehicle in July, discharging one round and slightly injuring two guards.

An investigation has concluded that a security officer at the Y-12 National Security Complex probably inadvertently pulled the trigger when a weapon fired inside a “hardened” vehicle in July, discharging one round that hit an interior wall and produced fragments, and slightly injuring two guards.

The accidental discharge occurred just after midnight on July 28, which, coincidentally, was the one-year anniversary of the July 28, 2012, security breach at Y-12.

The National Nuclear Security Administration said little after the accidental discharge. But the agency did acknowledge that two security police officers, or SPOs, received minor injuries and were treated at Y-12 before being taken to Methodist Medical Center of Oak Ridge, where they were treated and released. The NNSA also said the incident was under investigation.

Now, officials have concluded a four-month investigation, and B&W Y-12, the plant’s managing and operating contractor, has released a summary of the findings. [Read more…]