In message , D.P.Round
writes

Hopefully they have been more thorough than the designers of the twin
towers that were also supposed to withstand an airliner IIRC. The heat
of the fuel fire weakened the steelwork leading to their collapse
despite withstanding the initial impact as designed. A similar problem
may occur with Nuclear reactors.
But the twin towers did survive the initial impact, there was a program
on the collapse some time ago. It showed the cause to be the internal
layout which caused the building to act as funnels increasing the
intensity of the flames at critical parts, and as the internals started
to collapse the rest of the building was pulled down. It was also
stated that because of the design it couldn't have happened to the
Empire State building.
--
Clive