Document: NUREG-0800
Document ID: e7548e72-8c59-4c82-98dd-ff425e1de29a
Document Type: srp
Title: SEISMIC DESIGN PARAMETERS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1235/ML12352A305.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.7.1
CFR Part: 
CFR Title: 

Content:
d response spectrum (e.g., RG 1.60, or other appropriate shaped spectra if justified) and is defined as an outcrop response spectrum at the free-field foundation level. This response spectrum anchored at 0.1g will be referred in this SRP section as the minimum required response spectrum. i. Non-standard Plant Design. For a non-standard plant design (e.g., COL application referencing only an ESP, or a COL application not referencing a CD and ESP), the design response spectra is developed from the site- specific GMRS or from a broad band shaped spectra similar to RG 1.60 which also envelops the site-specific GMRS. Foundation level response spectra consistent with the design response spectra are determined for each seismic Category I structure. These foundation level spectra are compared to the minimum required spectrum to ensure they meet the 0.1g pga requirement in accordance with Appendix S to 10 CFR Part 50. If the foundation level spectra do not bound the minimum required response spectrum, then the design response spectra can be adjusted/modified in order to bound the minimum required spectrum. If the design response spectra are not modified, then the use of the two separate sets of spectra in the analysis and design of SSCs need to be reviewed for adequacy. ii. Certified Standard Plant Design (CD). For a DC application, the postulated seismic design response spectra need to bound the minimum required response spectrum anchored at 0.1g (as specified in Appendix S to 10 CFR Part 50). These design response spectra are referred to as the CSDRS when the design is certified by the Commission under 10 CFR Part 52. For a certified standard plant design (e.g., COL application that references a CD or a COL application that references a CD and ESP), a similar approach described above (under subsection II.1.a.i) is used to ensure that the CSDRS envelop the minimum required response spectrum. Foundation level response spectra consistent with the CSDRS are determined for each