Document: NUREG-0800
Document ID: 47506195-5ce2-4c13-a914-02847d53c193
Document Type: srp
Title: of Reference 4.
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052340570.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.5.2
CFR Part: 
CFR Title: 

Content:
substantiated by experimental results'. e. The maximum overturning moment, Mo, at the base of the tank should be obtained by the modal and spatiaT combination methods discussed in subsection II of SRP Section 3.7.2. The uplift tension resulting from M must be resisted either by tying the tank to the foundation with a~chor bolts, etc., or by mobilizing enough fluid weight on a thickened base skirt plate. The latter method of resisting HO must be shown to be conservative. f. The seismically induced -hydrodynamic pressures on the tank shell at any level can be determined by the modal and spatial combination methods in SRP Section 3.7.2. The maximum hoop forces in the tank wall must be evaluated with due regard for the contribution of the vertical component of ground shaking. The beneficial effects of soil-structure interaction may be considered in this evaluation (Refs. 4, 11, 12, and 13). The hydrodynamic pressure at any level must be added to the hydrostatic pressure at that level to determine the hoop tension in the tank shell. g. Either the tank top head must be located at elevation higher than the slosh height above the top of the fluid or else must be designed for pressures resulting from fluid sloshing against this head. h. At the point of attachment, the tank shell must be designed to withstand the seismic forces imposed by the attached piping. An appropriate analysis must be performed to verify this design. 3.7.3-7 Rev. 2 - AugusX 1989 I i. The tank foundation (see also SRP Section 3.8.5) must be designed to accommodate the seismic forces imposed on it. These forces include the hydrodynamic fluid pressures imposed on the base of the tank as well as the tank shell longitudinal compressive and tensile forces resulting from MO. j. In addition to the above, a consideration must be given to prevent buckling of tank walls and roof, failure of connecting piping, and sliding of the tank. III. REVIEW PROCEDURES For each area of review, the following review procedure is