Document: NUREG-0800
Document ID: f994604a-3360-4514-afe7-68461d4dfd34
Document Type: srp
Title: FLOODING PROTECTION REQUIREMENTS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070256.pdf
Revision Date: 2023-06
Chapter: 2
Section ID: 2.4.10
CFR Part: 
CFR Title: 

Content:
ismic Category I structures, but do afford some protection for seismic Category I structures from direct wave attack. Waves traveling around the ends of the breakwater, however, can reach and runup on seismic Category I structures, and the applicant used the resulting wave forces in the design of the structures. Seismic Category I structures considered in these analyses were the reactor building, the auxiliary building, and the residual heat removal building. In addition to considering the wave forces under the above postulated conditions, the applicant also provided airlocked and waterproofed doors that are normally closed for all openings in seismic Category I structures that are below the level of the maximum wave runup. We therefore conclude that the design of these structures meets the requirements of 10 CFR Part 50, 50.55a with respect to wave forces. We have independently evaluated the effects of the probable maximum surge stillwater elevation plus wind-generated waves on all seismic Category I structures and have concluded that the wave forces and wave runup estimates used by the applicant are conservative and therefore meet the requirements of 10 CFR Part 50, 50.55a, GDC 2, and 10 CFR Part 100. The findings will address the envelope of site-related hydrologic parameters, which should be representative of the most severe hydrologic characteristics expected to occur.53 For design certification reviews, the findings will also summarize, to the extent that the review is not discussed in other safety evaluation report sections, the staff’s evaluation of inspections, tests, analyses, and acceptance criteria (ITAAC), including design acceptance criteria (DAC), site interface requirements, and combined license action items that are relevant to this SRP section.54 2.4.10-7 DRAFT Rev. 3 - April 1996 V. IMPLEMENTATION The following is intended to provide guidance to applicants and licensees regarding the NRC staff's plans for using this SRP section. This SRP section