How Does an RBMK Reactor Explode

[classicdrogn]

The reactor in Chernobyl had been running for about three years and over this time - and the negative feedback from the fuel heating was no longer enough to counterbalance the effect of the void coefficient.

looks like you might have an editing artifact around the dash? At least, it would make more sense with a couple less words and/or no dash.

Another one a bit later is cutting things off:

More of them can be withdrawn, to push the reactor

the Chernobyl reactor was happy around about 30 Rods of reactivity.

The very last line is also missing at least a period.

I also found a typo:

This is important. Because after a few hours more, the Xenon goes away. More than that, Xenon which absorbs a neutron also 'goes away' - it's no longer Xenon-135 and it's massive ability ot hover up neutrons is suddenly gone.

ot hover -> to Hoover

This may not be the sort of comment you were looking for, but since you mentioned it being for your fic I figured a little help with polishing wouldn't be too out of line. It's an interesting piece, at any rate.

edit: Also, either an extra or missing carriage return at

after the combustion in the cylinders.
Normally, with the reactor in a steady-state,