And this particular refurbishment is in one of the countries with serious cost and schedule overruns for its nuclear build, and a country and specifically a region that is bad at physical infrastructure.
Like everything, this gets better with practice.
Does that sound more like an nth of a kind project, or a first of a kind project?
(The originally submitted Vogtle-3/4 design could not be built)
In fact, last I checked they had already planned this refurbishment, but could not obtain the funds to do it, and thus shut down the plant instead.
¯\_(ツ)_/¯