How Many Nuclear Engineers Needed to Change a Light Bulb

Apparently Changing a Light Bulb can almost lead to a melt down.....

Palisades nuclear plant accident investigated

It began with a light bulb.
Trying to fix a burned-out light bulb on an indicator button led to a serious incident that left the Palisades nuclear plant on Lake Michigan without half its electrical power on Sept. 25, 2011. A piece of equipment slipped while a worker was troubleshooting on a live electrical panel, causing an arc of electricity and a loss of half the indicators in the room that controls the reactor. Signals went haywire for a while. The plant shut down.

 http://www.freep.com/article/20120115/NEWS05/201150541/Michigan-s-Palisades-nuclear-plant-may-be-named-one-of-nation-s-5-worst?odyssey=tab