It was still online but they gradually started to shut some of the reactors down.
Totally crazy and just shows the lack of any backend support or logistics, all the money has been piled into simply fielding large numbers of some stuff.
It ties in quite well with a lot of known, long term issues the Russian army has with money that is meant to be used for maintenance etc simply "disappearing", and the thing about moving the trucks isn't even expensive, hard, or technically difficult to do, it's basically get someone (even a conscript with a days training on driving one) and tell them "drive it around the yard for 10 minutes, then press the buttons", it's a problem almost any civilian truck driver will understand, the only "new" bit is knowing to run the tyre inflator system through it's settings.
IIRC not to long ago someone went to one of the "active" military bases near Moscow and basically drove onto the base to find that it was deserted and left to rot, not a sign of any of the personal that on paper were living and working there, and it had obviously been like that for a long time.
On the flip side I was watching a video (from about 2015) of some Ukrainians who were moving a WW2 era Russian tank destroyer that had been sat in a field for ~65 years, they got it up and running well enough that it could put itself onto a transporter fairly quickly with basic tools.
I wonder if a lot of the Russian senior officers who are in charge of maintenance and making sure that the stockpiled equipment works are still of the mindset that such things are simple, and will just work after years of not being used* so see no issue with letting the maintenance go (and pocketing much of the money), and no one has the courage/ability to persuade them otherwise.
*Old equipment of all sorts tends to be far more able to just be started up relatively easily after years, if just because it tends to be far simpler and built to less precise tolerances, whilst newer stuff might break down just because an impurity in the fuel (or the fuel being old) results in a blocked injector, or one of a hundred gaskets/rubber pipes has perished or been nibbled by a mouse.