Related to this article..Violent fluctuations of hydrogen concentration in reactor1
In reactor2, hydrogen concentration is picking up since 6/14/2012 as well. Until 6/17/2012 11:00, it’s increased almost as double as before it picked up.
There are system A and system B to measure the hydrogen concentration, but it increased at both of the systems.
If hydrogen concentration goes over 4% (Oxygen 5%), there is the possibility of hydrogen explosion. Tepco is injecting nitrogen to control the hydrogen concentration.
Iori Mochizuki