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:
should note that the suggested criteria of RG 1.27 apply when the water supply comprises part of the ultimate heat sink. The staff should confirm that the application demonstrates that the extent and the duration of the inundation and the drawdown caused by the tsunami flood-causing 13 The Federal Emergency Management Agency (FEMA) has an extensive flood inundation mapping program. See https://www.fema.gov/guidelines-and-standards-flood-risk-analysis-and-mapping for information on FEMA’s latest inundation mapping standard. 14 In 2002, ANSI/ANS-2.8-1992 was administratively withdrawn and is currently undergoing revision. Until such time that an update becomes available, the staff believes that applicants may still find some of the earlier guidance in this standard useful to consider. 2.4.6-14 Revision 4 - September 2018 mechanism is adequately established for the purposes of determining the power plant design basis. 5. Hydrostatic, Wave, and Hydrodynamic Forces. The staff reviews the hydrostatic, wave, and the hydrodynamic forces caused by tsunami waves on those SSCs important to safety. Since the tsunami occurs as a train of waves, the staff should confirm that several incoming and receding wave cycles with different combination of wave lengths and periods are considered to estimate the maximum wave forces. The staff should also confirm that local bathymetry and site geometry, which can significantly affect the runup height, velocity, and momentum flux near the locations of those SSCs important to safety, be accounted for in any analysis of forces. The staff should note that the suggested criteria of RG 1.27 apply when the water supply comprises part of the ultimate heat sink. The staff should confirm that the application demonstrates that hydrostatic and hydrodynamic forces caused by the tsunami waves are adequately established for the purposes of the plant design bases. 6. Debris and Water-Borne Projectiles. The staff reviews the estimation of debris and