12 February 2012, Tokyo Electric Power Company (now effectively state owned due to running out of money) reporting that Fukushima Daiichi Reactor 2 is still heating up, despite efforts to cool it down.

Temps are now at 80 degrees Celsius (176 Fahrenheit).  TEPCo had increased cooling water injection to 14.6 tons per hour!

On 05 February, TEPCo reported temps up to 73.3 Celsius (163.9 Fahrenheit), and began injecting 10.6 tons of water per hour.  At first they thought the rise in temperature was due to recent plumbing work.

If the reactor exceeds 100 Celsius it will no longer be in “cold shut down”, and could experience re-criticality.

TEPCo is now revealing that the thermometers used on the reactors are not accurate, they have a margin of error of 20 degrees! Also, two other thermometers, on Reactor 2, are indicating temps of 35 Celsius (95 Fahrenheit), or lower.  So which thermometer is correct?

TEPCo has taken gas samples and said xenon levels are normal for the cooler temperatures, so they are now hoping that the thermometer reading the high temps is defective.  To be safe they plan to increase water injection to 18 tons per hour.