Well assuming i am correct in what i have read its
Fresh Cell will last 10,000Reactor ticks (10,000 seconds \ 160mins (166.666666666666666667 according to my calculator lol)
x20ticks = 200000 per alblaka
So when i say tick i guess i should change that to Reactor ticks.
Ticks according to him are 20 every 1 second.
Using the reactor test site, i put in a fresh cell surrounded by depleted started it watched it go till 1k on the fresh cell. checked the surrounding depleted each was hovering around -250 from the starting 9999, increased heat lvled it out at 3k500ish. Did the test again (started with a fresh cell and 4 depleted waited untill it ticked 1k times checked the Numbers it was around 500 ect.ect.)
Its the same measurement just different method, no idea why there is a distinction but there is. a Reactor tick = 1second and also 20ticks over 1 second lol.
The important thing is its 10000seconds for a fresh uranium to be used.
That being said, i have no idea on how one would time that with Red Power.