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A comment on Finland starts much-delayed nuclear plant, brings respite to power market. Parent comment

Re:Finland starts much-delayed nuclear plant, brings respite... by akiselev on Saturday March 12, 2022 @02:53PM (#30654338)
Most reactor downtime is due to refueling, since that requires cooling down the core through several stages. AFAIK it's not practical to do it safely and economically in under a few weeks.

Most reactor maintenance is already done during refueling so there isn't much more room to optimize that downtime. (though that may change the older a reactor gets)

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Re:Finland starts much-delayed nuclear plant, brings respite... by _n_b_ on Saturday March 12, 2022 @03:03PM (#30654411)
Most reactor downtime is actually for maintenance during refueling windows. As I mentioned in another comment, there is experience doing refuelling-only outages in <10 days. If everything goes well, you can startup a PWR from cold shutdown to hot full power in 3 12 hour shifts
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