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> Most of the plane is not a problem for 6ft of concrete and a steel liner. Planes are built to just about hold together.

It's still 575 tons of material crashing into the containment at a speed near at or even over the speed of sound. That is a lot of energy to dissipate, on top of that 250 tons of burning jet fuel is a lot of thermal energy that can quickly eat away at steel.

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> That is a lot of energy to dissipate

The NRC report states "with regard to the effects of shock associated with aircraft impact, WEC demonstrated that these shock loadings are less than those resulting from a design basis seismic event"

> burning jet fuel is a lot of thermal energy that can quickly eat away at steel

Hmmmm, it does have to get past the concrete. "for the fire aspect of AIA ... WEC demonstrated that the requirements of 10 CFR 50.150 are met."

https://www.nrc.gov/docs/ml1101/ml110170004.pdf

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