I made the following diagram out of all the reactor interior radiation levels given (DW = drywell, WW = wet well or suppression chamber):

It would appear that No. 1 should be much ore of a concern continued meltdown-wise. Checking other parameters for the last big uptick in drywell radioactivity, core and drywell pressures and temperature also went up, so this wasn't simply due to venting.

_{*Lunatic*, n.
One whose delusions are out of fashion.}