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:
for the areas of review stated in subsection I of this SRP section.. The-primary reviewer obtains and uses such input as required to assure that this review procedure is complete. The review procedure consists of: 1. A determination from the SAR as to which SSC are safety-related and should | be protected against floods or flooded conditions. 2. An evaluation using the plant arrangement and layout drawings as to the various means to prevent flooding of safety-related systems or components,. such as external barriers, enclosures, pumping systems, and watertight doors. The measures utilized are reviewed and coordinated with HGEB to determine their ability to cope with the design basis flood conditions, as established in SRP Sections 2.4.1 through 2.4.14. 3. An assessment of leakage, a determination if liquid-carrying systems could produce flooding, and an evaluation of the measures taken to protect safety- related equipment. The effects of piping failures are considered in SRP Section 3.6. The effects of potential flooding of SSC due to postulated failure of nonseismic Category I and nontornado protected tanks, vessels, and other process equipment is considered in this SRP section. A failure modes and effects analysis may be performed to determine that the flooding consequences resulting from failures of such liquid-carrying systems close to essential equipment will not preclude required functions of safety. systems. 4. A review of the SAR to ascertain if safety-related systems or components are capable of normal function while completely or partially flooded. 5. A review of plant arrangement and layout drawings to determine if safety- related'equipment or components are located within individual compartments or cubicles which act as positive barriers against possible means of flooding, and if barriers or other means of physical separation are utilized between redundant safety-related trains. 6. Review plant structure design drawings to determine if any safety-related