Document: NUREG-0800
Document ID: 3921f96a-d11f-4926-8200-7a9d08ba29cc
Document Type: srp
Title: PROBABLE MAXIMUM SURGE AND SEICHE FLOODING
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052340539.pdf
Revision Date: 2023-06
Chapter: 2
Section ID: 2.4.5
CFR Part: 
CFR Title: 

Content:
ls. These antecedent water levels must be as high as the "10% exceedence" monthly spring high tide plus a sea level anomaly based on the maximum difference between recorded and predicted average water levels for durations of two weeks or longer for coastal locations or the 100-yr recurrence interval high water for the Great Lakes. In a similar manner, the storm track, wind fields, effective fetch lengths, direction of approach, timing and frictional surface and bottom effects are evaluated by independent 2.4.5-2 Rev. 2 - July 1981 staff analysis to assure that the most critical values have been selected. Models used to estimate surge hydrographs that have not previously been reviewed and approved by the staff are verified by reproducing historical events, with any discrepancies in the model being on the conservative (i.e., high) side. Criteria and methods of the Corps of Engineers as generally summarized in Reference 32 are used as a standard to evaluate the applicant's estimate of coincident wind-generated wave action and runup. Criteria and methods of the Corps of Engineers and other standard techniques are used to evaluate the potential for oscillation of waves at natural periodicity. Criteria and methods of the Corps of Engineers (Ref. 32) are used to evaluate the adequacy of protection from flooding, including the static and dynamic effects of broken, breaking, and nonbreaking waves. Regulatory Guide 1.102 provides further guidance on flood protection. Regulatory Guide 1.125 provides guidance for using physical models in assessing flood protection. III. REVIEW PROCEDURES The staff will evaluate the applicant's analysis, including all of the assump- tions, techniques, and models used. If satisfied with their technical sbundness and applicability to the problem, the staff's evaluation will be focused on the conservatism of parameters used by the applicant. If not satisfied with the applicant's techniques, the staff will perform a simplified analysis of the