Document: NUREG-0800
Document ID: f689fb6d-4711-4972-b900-1b2001877b19
Document Type: srp
Title: TSUNAMI HAZARDS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1819/ML18190A200.pdf
Revision Date: 2023-06
Chapter: 2
Section ID: 2.4.6
CFR Part: 
CFR Title: 

Content:
lations are identified and described in the application. The staff need to review bathymetric and topographic data used in the numerical models. The staff reviews propagation of the tsunami waves from the generating source location towards the proposed site. When appropriate, the staff should confirm that the shallow water wave equation is used to simulate propagation of the maximum tsunami waves. The staff should confirm that simulation of the propagation of the tsunami waves in shallower waters, where the shallow water wave approximation is not valid, use nonlinear wave dynamics-based approaches. 4. Wave Runup, Inundation, and Drawdown. The staff reviews the estimation of wave runup as well as total inundation and drawdown elevations generated by the bounding tsunami event. The staff should confirm that this information is communicated in the 2.4.6-13 Revision 4 - September 2018 form of an inundation map.13 The staff will review water wave elevations reported to the nearest tenth of a foot and the geodetic reference datum used by the applicant to report the water surface elevation. The staff will review the applicant’s assumed initial water surface elevation for the body of water under consideration, at the arrival of the tsunami waves at the site, similar to the review performed for the storm surges and seiches mechanisms.14 For example, to review the estimate of the highest tsunami wave runup at a coastal site, the staff should review the 90th percentile of high tides as the initial water surface elevation near the site; to review the estimate the lowest drawdown caused by receding tsunami waves at the same site, the staff should review the 10th percentile of the low tides as the initial water surface elevation. The staff will review separate flooding levels, corresponding to different locations within the powerblock, as the flood water elevation may vary spatially owing to differences in the finished site grade and the presence of multiple as-built reactor