Document: NUREG-0800
Document ID: c447d6bd-a500-4e1a-acf0-d819cc4f0e41
Document Type: srp
Title: FOUNDATIONS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0705/ML070550055.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.8.5
CFR Part: 
CFR Title: 

Content:
terior structures, and any shield building surrounding the containment. For some pressurized-water reactor containments, the base mat has a central depression that forms the reactor cavity. The review addresses the general arrangement of the containment base slab, as described in Subsection I.1 of Standard Review Plan (SRP) Section 3.8.1, with particular emphasis on methods of transferring horizontal shears, such as those caused by earthquakes, to the foundation media. If shear keys are used for such purposes, the review covers the general arrangement of the keys. If waterproofing membranes are used, the review addresses their effect on the shear resistance of the foundation. In prestressed concrete containments with a tendon inspection gallery, the review includes the arrangement of the gallery and means of either isolating it from the remainder of the base slab or relying on it for some function such as resisting shears. B. Containment Enclosure Building Foundation If the containment enclosure building is constructed of reinforced concrete, it is usually supported on the same mat foundation that supports the containment. If the containment enclosure building is constructed of structural steel and metal siding, it may surround only the exposed portion of the containment. In such a situation, the enclosure building columns are founded on individual or combined footings at grade level, on the roof of the buildings adjacent to or surrounding the containment, on the dome of the containment, or possibly on brackets anchored to the exterior face of the cylindrical wall of the containment. The review includes the general arrangement of such foundations, with particular emphasis on methods of isolating the enclosure building from other buildings in a lateral direction when this is preferable to minimize seismic interaction. C. Auxiliary Building Foundation The auxiliary building foundation is typically of a mat type, particularly if the supporting medium is soil. The