[BuckeyeTexan]

Update as of 2:15 EDT March 15, 2001
Tokyo Electric Power Co. said that an oil leak in a cooling water pump at Unit 4 was the cause of a fire that burned for approximately 140 minutes. The fire was not in the spent fuel pool, as reported by several media outlets.(Emphasis mine.)

Updated at 5:00 PM EDT March 15, 2011
Fact Sheet: Used Nuclear Fuel Storage at Fukushima Daiichi

[Ernest_at_the_Beach]

Thanks,...all the media seems to think it is the fuel rods.