Hi, this is my first post in this forum so i dont know if this is the right topic.
For me 4 single cells generate the full amount (12mio) of EU shown in the planer, while
a single quad cell gernerates only half of the EU (6mio).
So for quad cells the paner will show the double amount of overall generated EU.
I know this is a known bug of the planer but may it should be mentioned in the first official post,
for ppl who are looking for a reactor with highest EU output per cell.
if its wrong threat pls delete this post 
so long muh0r