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:
with the staff conclusion of adequacy. 2.4.5-7 DRAFT Rev. 3 - April 1996 A sample statement for an OL review follows: The design basis hurricane-induced high and low stillwater levels were established during the CP review at elevations 22.0 feet 6.7-m (22.0-ft) MSL and -7.5 feet -2.3-m 26 (-7.5-ft) MSL, respectively. These levels are based upon the estimated water levels, 27 exclusive of wave action, that would occur during passages of a probable maximum hurricane (PMH) to the south and north, respectively, of the plant. At the request of the staff, the applicant analyzed the wave conditions on safety-related facilities that could accompany the 22 foot 6.7-m (22-ft) MSL surge level. The results of these analyses 28 indicate the most severe wave action would be restricted to the canal, and that high ground levels would limit wave heights in the vicinity of exposed safety-related buildings, except the service water intake, to 1.6 feet 0.5 m (1.6 ft). For the intake, the 29 applicant has estimated waves 3 feet 1 m (3 ft) high. The resulting wave runup levels 30 were estimated to reach a maximum elevation of 28.3 feet 8.6-m (28.3-ft) MSL on the 31 intake and 25.6 feet 25.6-m (25.6-feet) MSL on other exposed buildings. 32 The staff concludes that the plant design meets the requirements of General Design Criterion 2 and 10 CFR Part 100 with respect to surge and seiche flooding. The bases for this conclusion is that the intake structure and the other exposed plant buildings are designed to withstand wave runup to 29.0 feet 8.8-m (29.0-ft) MSL and 26.0 feet 7.9-m 33 (26.0-ft) MSL respectively, which are above the maximum calculated wave runup 34 levels discussed above. For an application referencing a certified plant design, the reviewer's findings should include a concluding statement similar to the following: Historical data for the proposed site are consistent with the flood levels identified in the site parameter envelope specified in the certified plant design