Document: NUREG-0800
Document ID: 3a64837e-1633-463f-a4a7-e8657d177b48
Document Type: srp
Title: PROBABLE MAXIMUM TSUNAMI HAZARDS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0701/ML070160659.pdf
Revision Date: 2023-06
Chapter: 2
Section ID: 2.4.6
CFR Part: 
CFR Title: 

Content:
rical records. The landslide sources should be characterized using the maximum volume parameter determined from seafloor mappings or geologic age dating of the historical landslides. A slope-stability analysis should be performed to assess the potential tsunami generation efficiency of the candidate landslides. The tsunamigenic source types caused by volcanic activity considered in the PMT assessment should include pyroclastic flows, submarine caldera collapse, explosions, and debris avalanches or flank failures. The staff reviews the initial displacement of the water surface that subsequently causes the radiating tsunami waves. The initial displacement of the water surface should be estimated conservatively. The staff reviews propagation of the PMT waves from the source towards the proposed site. If appropriate, the shallow water wave approximation should be used to simulate propagation of the PMT waves in deep waters. The simulation of the propagation of the PMT waves in shallower waters, where the shallow water wave approximation is not valid, should use nonlinear wave dynamics approaches. 2.4.6-9 Revision 3 -March 2007 3. Tsunami Propagation Models. The staff reviews the computational models used in the PMT hazard analysis. Tsunami propagation models should be used, such as those used by NOAA that are published in peer-reviewed literature and are verified using extensive testing. The staff reviews the model parameters and the input data used to simulate the propagation of the PMT waves towards the site. The model parameters should be described and their conservative values should be chosen. All other data used for model input should be described and their respective sources noted. Usually bathymetry and topography data archived and maintained by NOAA/NGDC, the USGS, and the U.S. Army Corps of Engineers are sufficient. 4. Wave Runup, Inundation, and Drawdown. The staff reviews the wave runup caused by the PMT. An appropriate initial water surface elevation for