Document: NUREG-0800
Document ID: 2848b3ce-e5ba-4e58-8350-4a3b1336285b
Document Type: srp
Title: FLOOD PROTECTION
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070304.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.4.1
CFR Part: 
CFR Title: 

Content:
REVIEW RESPONSIBILITIES Primary - Auxiliary Systems Branch (ASB)Plant Systems Branch (SPLB)1 Secondary - NoneCivil Engineering and Geosciences Branch (ECGB)2 I. AREAS OF REVIEW 1. The ASBSPLB review of the plant flood protection includes all structures, systems, and 3 components (SSCs) whose failure could prevent safe shutdown of the plant or result in uncontrolled release of significant radioactivity to assureensure conformance with the 4 requirements of General Design Criterion 2 (GDC 2), "Design Bases for Protection Against Natural Phenomena." The facility design and equipment arrangements 5 presented in the applicant's safety analysis report (SAR) are reviewed with respect to the following considerations: 6 a. To identify the safety-related SSCs that must be protected against flooding from both external and internal causes; b. 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 Standard Review Plan (SRP) Sections 2.4.1 through 7 2.4.14; c. To determine the capability of roofs designed for safety-related structures to withstand the effects of maximum precipitation events;8 DRAFT Rev. 3 - April 1996 3.4.1-2 d. To determine the adequacy of the isolation of redundant safety-related systems or equipment subject to flooding; and f. 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. 2. The ASBSPLB review also includes consideration of flooding of SSCs important to 9 safety from internal sources of SSC important to safety from, such as those caused by10 failure of tanks, vessels, and piping and backflow through floor drains. The effects of 11 piping failures