Document: NUREG-0800
Document ID: fc11b179-5899-46ec-9add-723cad9f6565
Document Type: srp
Title: PROBABLE MAXIMUM SURGE AND SEICHE FLOODING
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0707/ML070730425.pdf
Revision Date: 2023-06
Chapter: 2
Section ID: 2.4.5
CFR Part: 
CFR Title: 

Content:
, and severe cyclonic wind storms for all lake sites followed by USACE, NOAA, other state and federal agencies, and the staff are used for evaluating the conservatism of the applicant’s estimates of severe windstorm conditions. The USACE and NOAA criteria require variation of the basic meteorological parameters within given limits to determine the most severe combination that could result. The applicant's hydrometeorological analysis should be based on the most critical combination of these parameters. 2.4.5-8 Revision 3 - March 2007 Instead of an independent analysis, the staff’s review may verify an applicant’s assumptions and methodology or may require consultation with State and Federal agencies that have the authority and the responsibility to carry out similar analyses. 3. Seiche and Resonance. Models such as Platzmann’s (1963) or other verified models may be used to estimate the maximum surge or seiche stillwater elevation for Great Lakes sites. Some two-dimensional models (e.g., Longuet-Higgins and Stewart, 1963; Reid and Bodine, 1968; Tsai and Chang, 1974) include seiching effects. Seiching potential may be 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 the USACE Coastal Engineering Manual 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 possibility of damaging seiching. Similarly, seismically induced seiching is if the natural period of oscillation of the water body is dissimilar from the period of precluded seismic excitation. If resonance is possible, the maximum and minimum seiche water surface elevations should be considered in the selection of the critical flood design bases or design low water conditions. 4. Wave Runup. Detailed