The massive quantum computer has unpredictable power consumption.

   2013/10/8 brian carroll <[1]electromagnetize@gmail.com>

     Power surges 'cripple NSA data centre'
     [2]http://www.bbc.co.uk/news/technology-24443266
          "It said civil contractors were confident the problem had been
     solved but a special US Army engineer investigation team had said
     the
     cause was "not yet sufficiently understood" to be sure that it would
     not happen again."

References

   1. mailto:electromagnetize@gmail.com
   2. http://www.bbc.co.uk/news/technology-24443266