Verification of the Structural Behaviour in the Event of an Airplane Impact - The Risks of Nuclear Energy Technology - page 279

Fig. 15.1 Schematic illustration of the design of a reactor building of the convoy type: outer
reinforced concrete containment with a wall thickness of 1.80 m, steel safety structure ( sphere );
internal structures are only coupled with the outer containment through the foundation

Failure due to flexure

Failure due to shear

Soft impact

Penetration Penetration Perforation

Hard impact

Scabbing

Spalling

(Inherent
protection)

Protection against
perforation

Fig. 15.2 Soft and hard impact