Totally missing from Smith's new report is any mention of the flow meter placement or condition (half full etc).
Theory A : the flow meter was half full
Theory B: the flow meter measures the output of the Grundfos pump. No evidence presented that the condensate return connects to the steam riser.
He states that there was no capablity of superheating the steam, that all the Big Frankie reactors were under water. No proof for this.
Internally some reactors could have been boilers, some super-heaters.
It does seem impossible for there to be an additional heat exchanger.