Isn’t the Fort Calhoun Nuclear Station not dangerous since it has been shut down since April:

    It is good that OPPD’s Fort Calhoun reactor has been shut down since April for refueling and maintenance.  Spent nuclear fuel in the form of uranium rods however, are still very hot (and radioactive) and require cooling in any nuclear power plant in a facility called the spent fuel pool.
    Spent uranium rods must be cooled in a containment unit for up to a decade.  The rods are sitting in a special water and a large coolant heat exchanger much like a radiator pipes through this type of facility.  The coolant is pumped through the pipes by large electric pumps which must keep running to prevent the spent rods from getting too hot.  If the rods get too hot they can boil the water off themselves, creating hydrogen and possibly blowing the roof off the containment bunker. http://en.wikipedia.org/wiki/Spent_fuel_pool
   
    This is what happened at the spent fuel pool at Fukushima #4 in Japan.  Once the roof is gone radiation will go into the air.
    What is crucial at Fort Calhoun is to keep these electric coolant pumps running in the spent fuel pool.
    OPPD disclosed how long it would take for the rods to boil in a press release after their June 7th fire.  They stated that 88 hours without active cooling is all it would take for the water to boil off of the spent fuel rods.  It should be noted that they fixed the electrical problem on June 7th after only 2 hours.  And as of now the coolant pumps are running fine.

Here is an article about the June 7th fire:  http://www.propublica.org/article/electrical-fire-knocks-out-spent-fuel-cooling-at-nebraska-nuke-plant/single