Document: NUREG-0800
Document ID: 94da2f11-6df6-47d0-a25e-edeb21a4d649
Document Type: srp
Title: 3.7.1-12
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1419/ML14198A460.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.0
CFR Part: 
CFR Title: 

Content:
.88657 ܥଶൌexpሺെ10.411ሻ ܥଷൌ2.5099 ܥସൌെ7.4408 ൅ܯሾ1.5220 െ0.088588ܯ൅0.0073069 lnሺ0.12639ܴ൅1ሻሿ ܥହൌെ0.34965 ܿ଺ൌെ0.31162 ൅0.0019646ܴ ܿ଻ൌ3.7841 ܥ଼ൌെ0.89019 ܿଽൌ0.39806 ൅0.058832ܯ Similarly, the horizontal design spectra for rock site conditions appropriate for the Western Unites States (WUS) are defined as a function of the earthquake moment magnitude M and the fault distance R (in km) by the following equation: ln ቆܵܣሺ݂ሻ ܲܩܣቇൌ ܥଵ coshሺܥଶ݂஼యሻ൅ܥସቆexpሺܥହ݂ሻ ݂஼ల ቇ (4) where the parameters C1 through C6 are defined as: ܥଵൌ1.8197 ܥଶൌ0.30163 ܥଷൌ0.47498 ൅0.034356ܯ൅0.0057204ln ሺܴ൅1ሻ ܥସൌെ12.650 ൅ܯሾ2.4796 െ0.14732ܯ൅0.034605 lnሺ0.040762ܴ൅1ሻሿ ܥହൌെ0.25746 ܿ଺ൌ0.29784 ൅0.010723ܯെ0.0000133ܴ For each magnitude-distance bin in the NUREG/CR-6728 database, a bin representative design response spectrum is defined in this appendix by Equations (3) or (4) with the moment magnitude M and fault distance R equal to the midpoint bin values. For example, for bin M6-7 D010-050, the midpoint bin values are M=6.5 and R=30 km. For a NUREG/CR-6728 bin representative horizontal response spectrum as defined above and anchored to 1.0 g, the following guidance on developing minimum PSD can be used in conjunction with the target PSD tabulated in Tables 1 and 2 of Appendix B. For other peak accelerations, the target PSD in Tables 1 and 2 of Appendix B should be scaled by the square of the peak acceleration. For response spectrum shapes different from the NUREG/CR-6728 bin representative shapes (and different from RG 1.60 horizontal design spectra), the target PSD may be developed based on the guidance in Section B.2 of this appendix and are reviewed and accepted by the NRC staff on a case-by-case basis. 3.7.1-29 Revision 4 – December 2014 The averaged one-sided PSD defined by Equation (1) should exceed 70