The mysterious conflagrations have delayed the opening of the million square foot facility by a year

George Frey / Bloomberg / Getty Images This is view of the National Security Agency new data center being built in Bluffdale, Utah, U.S., on Thursday, July 4, 2013.

Related Meltdowns Hobble NSA Data Center Wall Street Journal

The NSA’s new data-storage center in Utah has suffered a series of mysterious meltdowns in the past year.

Officials told the Wall Street Journal that 10 fiery explosions, known as arc-fault failures, have ripped apart machinery, melted metal and destroyed circuits. The repeated meltdowns have delayed the opening of the one-million square foot facility by 12 months.

Investigators have not yet determined the root cause of the electrical failures, nor have they agreed upon a solution that could prevent the explosions from happening again.

[Wall Street Journal]