Comment by epistasis

Thank you for being specific! This is no longer the case under modern licensing.

Look at Vogtle and Summer, who were so expensive and disastrous that the Summer build was abandoned with billions of dollars sunk in construction.

Nothing was changed on the regulatory side, and it was licensed under a new regulatory model requested by industry, that let them start construction without everything fully designed yet. There were many super expensive changes during the build, but that was due to EPC, not regulatory stuff.

The NRC has been extremely open to regulatory changes since the 2000s, especially with the "nuclear renaissance" push around 2008. I'm not aware of any suggested regulatory changes that were not adopted.