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:
proach, timing, and frictional surface and bottom effects are evaluated by independent staff analysis to assure ensure that the most critical values 7 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 33 are 8 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 33) 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. Technical Rationale9 The technical rationale for application of the above acceptance criteria to reviewing surge and seiche flooding at a nuclear power plant site is discussed in the following paragraphs:10 1. Compliance with GDC 2 requires that nuclear power plant structures, systems, and components important to safety be designed to withstand the effects of natural phenomena such as earthquake, tornado, hurricane, flood, tsunami, and seiche without DRAFT Rev. 3 - April 1996 2.4.5-4 loss of capability to perform their safety functions. The criterion further specifies that the design bases for these structures, systems, and components shall reflect the following: a. Appropriate consideration of the most severe natural phenomena historically reported for the site and surrounding area, with sufficient margin for the limited accuracy, quantity,