From TEPCO's regular press conference at 6PM, April 13, 2012.
The heat exchanger for the Reactor 4 Spent Fuel Pool restarted at 4:04PM.
Temperature as of 5PM was 37.6 degrees Celsius on the water surface.
TEPCO took the photos of Reactor 3's Spent Fuel Pool. One of the photos shows the fuel exchanger (upper right):
Photo No.1 (upper left) was taken from the surface of the water. Matsumoto says the fuel racks are underneath the debris. Photos No.2 (upper right), No.3-1 (lower left), No.3-2 (lower right) shows the pool at 7 meters from the surface. Photos No.2, No.3-1 and No.3-2 were taken from the cask space.
Photo No.3-1 shows the fuel rack, and the fuel handles. Photo No.3-2 is a blow-up of No.3-1.
Matsumoto says the pool didn't look damaged as far as the camera could see.
The video was taken, and TEPCO is currently reviewing the video. It will be made public next week.