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by testing22321 1 hour ago
Is 90% equal to 24x7, 365?
1 comments

Yes. The refueling takes the most time but that is planned years in advance. A one-year planned outage every decade can still be 24/7/365 in the other nine years.
Natrium is expected to spend around 1 month refueling every 24 months.
So that is say 5% downtime. Add in time for upgrades and refurbishments, and refueling periods alone are bang on the 10% downtime number.
Ah yes, the ol' GitHub method of reporting. "When we're up, we have lots of nines!"