Document: NUREG-0800
Document ID: ed40908c-6d5d-42a3-bb9e-fcf4f68dd278
Document Type: srp
Title: FLOODING PROTECTION REQUIREMENTS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052340554.pdf
Revision Date: 2023-06
Chapter: 2
Section ID: 2.4.10
CFR Part: 
CFR Title: 

Content:
of structural design criteria adequacy and to Auxiliary Systems Branch (ASB) and Equipment Qualification Branch (EQB) for determination of safety system adequacy. For flood protection requiring emer- gency action, the design basis flood conditions, and other less severe events, are reviewed to establish the minimum time available for implementation of emergency procedures. Physical parameters such as rate-of-rise (of river or lake levels), as well as evaluation (based on experience and engineering judgment) of flood warning networks, provide the staff with an independent estimate of available time. These data are provided to ASB and EQB for their independent evaluation of the time required to implement shutdown and flood protective measures.. 2.4.10-2' Rev. 2 - July 1981 For OL. reviews, the design of flood protection measures is reviewed to assure compatibility with the original design basis. For those plants for which shutdown (if required under Regulatory Guide 1.59, Position 2) and installation of protective measures is required in the event of a major flood, the procedures for carrying out these measures are reviewed for compatibility of available and required times as established above. The Technical Specifications must reference an emergency plan which allows for the orderly installation of required flood protection. The above reviews are performed only when applicable to the site or site region. Some items of review may be done on a generic basis. IV. EVALUATION FINDINGS For CP reviews, the findings will consist of statements of flood design bases for safety-related facilities. If emergency procedures are required, the findings will indicate staff conclusions that time for implementation and methods of providing flood protection provide the necessary protection. For OL reviews the findings will indicate the flood protection measures. provided for safety-related facilities, and will indicate the type of technical specifica- tions required to assure that the