Document: NUREG-0800
Document ID: f994604a-3360-4514-afe7-68461d4dfd34
Document Type: srp
Title: FLOODING PROTECTION REQUIREMENTS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070256.pdf
Revision Date: 2023-06
Chapter: 2
Section ID: 2.4.10
CFR Part: 
CFR Title: 

Content:
structed, tested, and inspected in accordance with the requirements of applicable codes and standards commensurate with the importance of the safety function to be performed. The criteria specified in 10 CFR 50.55a apply to this SRP section because the reviewer verifies the use of appropriate codes and standards for the design, construction, and inspection of safety-related structures and components that might be required to protect against flooding. To demonstrate compliance with 10 CFR 50.55a, the applicant's SAR must contain a description of flooding phenomena that could have potentially adverse impacts on safety-related systems, structures, or components. The description must be sufficient to provide a basis for evaluating the acceptability of the site and for assessing the adequacy of any flood protection that might be required for plant structures, systems or components designated as important to safety. Meeting the requirements of 10 CFR 50.55a provides assurance that plant structures, systems, or components designated as important to safety are designed to withstand, or are protected against, the effects of flooding.23 2. Compliance with GDC 2 requires that nuclear power plant structures, systems, and components important to safety be designed to withstand the effects of natural phenomena such as earthquake, tornado, hurricane, flood, tsunami, and seiche without loss of capability to perform their safety functions. The criterion further specifies that the design bases for these structures, systems, and components shall reflect the following: a. Appropriate consideration of the most severe natural phenomena historically reported for the site and its surrounding area, with sufficient margin for the limited accuracy, quantity, and time period in which the historical data have been accumulated; b. Appropriate combinations of the effects of normal and accident conditions with those of the natural phenomena; and DRAFT Rev. 3 - April 1996 2.4.10-4 c. The importance