Document: NUREG-0800
Document ID: 8160c1fd-7cef-4c93-8e12-456019f2cfd2
Document Type: srp
Title: FOUNDATIONS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1319/ML13198A267.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.8.5
CFR Part: 
CFR Title: 

Content:
REVIEW RESPONSIBILITIES Primary - Organization responsible for structural analysis reviews Secondary - None I. AREAS OF REVIEW The review covers areas relating to the foundations of all seismic Category I structures. The specific areas of review are as follows: 1. Description of the Foundations. The review covers descriptive information, including plans and sections of each foundation, to establish that sufficient information is provided to define the primary structural aspects and elements relied on to perform the foundation function. The review also addresses the relationship between adjacent foundations, including the methods of separation provided if such separation is used to minimize seismic interaction between the buildings. In particular, the review identifies the type of foundation and examines its structural characteristics. Among the various types of foundations reviewed are mat foundations and footings, including individual column footings, combined footings supporting more than one column, and wall footings 3.8.5-2 Revision 4 – September 2013 supporting bearing walls. Some applications submitted for design certification (DC) use a single mat foundation for the nuclear island structures. Other types of foundations that may be used include pile foundations, drilled caissons, caissons for waterfront structures, such as a pumphouse, and rock anchor systems. The review addresses these types of foundations on a case-by-case basis. The paragraphs below list major plant seismic Category I foundations that are reviewed, together with associated descriptive information: A. Containment Structure Foundation The most commonly used type of foundation for both concrete and steel containments is a mat foundation, which is a flat thick slab supporting the containment, its interior structures, and any shield building surrounding the containment. For some pressurized-water reactor containments, the basemat has a central depression that forms the reactor cavity. The