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:
y for a nuclear power reactor. To satisfy the hydrologic requirements of 10 CFR Part 100, the applicant's SAR must contain a description of the surface and subsurface hydrologic characteristics of the region and an analysis of the potential for flooding due to surges or seiches. This description must be sufficient to assess the acceptability of the site and the potential for a surge or seiche to influence the design of plant structures, systems, and components important to safety. Meeting this requirement provides a level of assurance that plant structures, systems, and components important to safety have been designed to withstand the most severe flooding likely to occur as a result of storm surges or seiches. 12 1 Based on the difference between normal water levels and the flood event. 2.4.5-5 DRAFT Rev. 3 - April 1996 III. REVIEW PROCEDURES The staff will evaluate the applicant's analysis, including all of the assumptions, techniques, and models used. If satisfied with their technical soundness 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 controlling surge and seiche flooding level (coincident with wind-generated wave activity) and the resulting effects (static and dynamic) to the safety-related facilities using simplified calculational procedures or models with demonstrably conservative coefficients and assumptions. If the applicant's estimates of critical water level are no more than 5% less conservative than the staff's estimates, staff concurrence will be stated. If the applicant's 1 estimates are more than 5% less conservative, the analysis is repeated using more realistic techniques. 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