The location whose thermocouple (69H1, bottom head) apparently broke after the resistance test by TEPCO yesterday and the location at the support skirt junction are both located at 0 degree.
The thermocouple at the support skirt junction, 69F1, is not spiking up or continuously trending up like 69H1, but the range of fluctuation is rather wide, compared to the other two at the same height at different angles.
Hmmm. Next to go?
From the latest plant parameter on Reactor 2 RPV temperature, hourly, 69H1 (bottom head at 0 degree) and 69F1 (support skirt junction at 0 degree) highlighted:
Hourly temperature fluctuation at the thermocouples at the support skirt junction:
69F1 (at 0 degree): by 0.1 to 11.7
69F2 (at 135 degrees): by 0.1 to 0.3
69F3 (at 270 degrees): by 0.1 to 0.2
By the way, TEPCO released the graph of the thermocouple 69H1 (2/13/2012). It sure looks like TEPCO's resistance test did something:
People are chiming in on Japanese Twitter, saying "Yes I've done exactly that, pushing one test too far..."