Document: NUREG-0800
Document ID: c780e08f-5c9f-4314-9b99-4291374f379c
Document Type: srp
Title: PROBABLE MAXIMUM SURGE AND SEICHE FLOODING
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070244.pdf
Revision Date: 2023-06
Chapter: 2
Section ID: 2.4.5
CFR Part: 
CFR Title: 

Content:
hniques. The staff will develop a position based on the analysis; resolve, if possible, differences between the applicant's and staff's surge and seiche flooding design basis; and write the SER safety evaluation report (SER) input accordingly. The specific review procedures are 13 described below and outlined in Figure 2.4.5-1. In general, the conservatism of the applicant's estimates of flood potential from surges and seiches is judged against the criteria indicated in subsection II above and as discussed in Regulatory Guide 1.59. If the site is not near a large body of water, the staff findings may be prepared a priori. Methods of the Corps of Engineers and National Oceanic and Atmospheric Administration (NOAA) (HUR 7-97 and amendments, Ref. 41) are used to develop the critical 14 probable maximum hurricane (PMH) parameters for the site. The Corps of Engineers model SURGE (or other verified models) may be used to estimate the maximum surge stillwater elevations at coastal sites. Coincident wind-generated waves and runup are estimated from publications by the Corps of Engineers (Ref. 32 33). Reports of NOAA and the Corps of Engineers are used to estimate probable maximum wind fields over the Great Lakes. Models such as Platzmann's (Ref. 26), or other verified models, may be used to estimate the maximum 15 surge or seiche stillwater elevation for Great Lakes sites; coincident wind-generated waves and runup are estimated as above. Two-dimensional models (Refs. 17, 28, and 44 18, 29, and 45) include seiching effects. Seiching potential is evaluated using one-dimensional models by comparing the natural period of oscillation (resonance) of the water body with the estimated meteorologically induced wave periods. Resonance of a water body may be calculated by the methods presented in Reference 32 33 or standard texts. Generally, a demonstration that the water body cannot generate or sustain waves of the required period for resonance is satisfactory to discuss the