[landemva]

> not like regular buildings and require more logistics for repairs but there's no way it would require 20 years.

tldr; regulatory processes prevent improvements.

I work in a highly regulated industry though not nuclear. There are obvious things to change which were approved in the site plans decades ago. Those nonsensical systems must be maintained because if they stop working for a small number of hours, everything must be stopped and there will be fines. It won't be changed because doing so requires asking regulator for approval and then everybody and their uncle gets to make a comment and even sue to stop it. Regulatory process hinders obvious good changes and improvements.

BTW, this is similar to how Los Angeles squeezed out good paying manufacturing jobs three decades ago - make it near-impossible to get electrical permit to change anything.