Document: NUREG-0800
Document ID: 45edd5cb-5936-48de-9527-039982576fa8
Document Type: srp
Title: FLOOD PROTECTION
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052340628.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.4.1
CFR Part: 
CFR Title: 

Content:
REVIEW RESPONSIBILITIES Primary - Auxiliary Systems Branch (ASB) Secondary - None I. AREAS OF REVIEW The ASB review of the plant flood protection includes all structures, systems and components (SSC) whose failure could prevent safe shutdown of the plant or result in uncontrolled releaseof significant radioactivity to assure conformance with the requirements of General Design Criterion 2. The facility design and equipment arrangements presented in the applicant's safety analysis report (SAR) are reviewed with respect to the following considerations: to identify the safety-related SSC that must be protected against flooding from both external and internal causes; to determine the capabilities of.structures housing safety-related systems or equipment to withstand flood conditions, i.e., the relationship between structure elevation and flood elevation including waves and wind effects as determined in the review described in SRP Sections 2.4.1 through 2.4.14; to determine the adequacy of the isolation of redundant safety-related systems or equipment subject to flooding; to identify possible inleakage sources, such as cracks in structures not designed to withstand seismic events and exterior or access openings or penetrations in structures located.at a lower elevation than the flood level and associated wave activity. The ASB review also includes consideration of flooding from internal sources of SSC important to.safety from fai~lure of tanks, vessels, and piping. The effects of piping failures are considered in SRP Section 3.6.1. The effects of flooding due to failure of tanks and vessels are reviewed within the context of this SRP section. The ASB review for the underground drainage system and for flood protection uses information provided by HGEB reviews, as indicated below, to assure that the inte- grated design of the underground drainage system is capable of performing its safety function and that the.flood protection utilized is compatible with the maximum flood