shows that the damage to the fuel rods in the Pool is only partial, if that, says TEPCO.
Asahi Shinbun (in Japanese; 12:58AM JST 4/14/2011) reports that TEPCO released the result of the test that it did on the water sample it had taken from the Spent Fuel Pool of the Reactor 4 on April 12. The result has not been posted on TEPCO's site, but from the Asahi article:
400 cc (0.4 liter) of water in the Pool was taken, using the concrete pump's boom, on April 12;
Iodine-131: 220 becquerels/cc
Cesium-134: 88 becquerels/cc
Cesium-137: 93 becquerels/cc
In normal operation of the reactor, these numbers would be less than 1 becquerel.
The numbers are low compared to the contaminated water in the turbine building in which these numbers are in several million becquerels, leading TEPCO to conclude that "part of the fuel rods may be damaged, but the majority of the rods in the Pool are intact."
Fuel rods were all under water (2 meters under water).
Mainichi Shinbun (in Japanese; 10:23AM JST 4/13/2011) may be saying "Not so fast." Why? Because the temperature of the Pool is high, and the radiation level above the Pool is high.
The Spent Fuel Pool's temperature was found to be 90-degrees Celsius, higher than the temperature (84-degrees Celsius) when the hydrogen explosion happened on March 15. In addition, at 6 meters above the Pool, the radiation level was 84 milli-sievert/hr; during normal operation of the reactor, the radiation level there would be 0.0001 milli-sievert.
The Mainichi article says all TEPCO can do is to replenish the water in the Pool as it evaporates from the heat, until the water (coolant) circulation system is somehow restored to remove the heat.
And when will that be? According to TEPCO's president in the presser on April 13 that I watched, "all in good time" and he really doesn't know much of anything.