Document: NUREG-0800
Document ID: 64c331f4-7cf6-4155-b7d2-b0087a4254b8
Document Type: srp
Title: PROBABLE MAXIMUM TSUNAMI FLOODING
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070246.pdf
Revision Date: 2023-06
Chapter: 2
Section ID: 2.4.6
CFR Part: 
CFR Title: 

Content:
d coincident with the tsunami. Plant grade at elevation +55 feet +16.8-m (+55-ft) MLLW is well above the tsunami flood level. The maximum wave runup, at 24 the intake pumphouse, was estimated as +31.2 feet +31.2-m (+31.2-ft) MLLW, which 25 is 3.8 feet +1.2 m (3.8 ft) below the design flood level of +35 feet +10.7-m (+35-ft) 26 27 MLLW. The maximum drawdown at the location of the inshore intake was estimated as -21.3 feet -6.5-m (-21.3-ft) MLLW. The intake is designed to be able to draw water 28 down to -30 feet -9.1-m (-30-ft) MLLW and will therefore not be affected by low water 29 due to tsunami drawdown. 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 documents.30 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.31 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 will be used by the staff when performing safety evaluations of license applications submitted by applicants pursuant to 10 CFR 50 or 10 CFR 52. Except in those cases in which the applicant proposes an acceptable alternative method for complying with specified portions of the Commission's regulations, the method described herein will be used by the staff in its evaluation of conformance with Commission regulations. The provisions of this SRP section apply to reviews of applications docketed six