Document: NUREG-0800
Document ID: 92e07546-68d7-4c8e-a984-7d1f1f4d882d
Document Type: srp
Title: EQUIPMENT AND FLOOR DRAINAGE SYSTEM
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0705/ML070550042.pdf
Revision Date: 2023-06
Chapter: 9
Section ID: 9.3.3
CFR Part: 
CFR Title: 

Content:
ected so that an inadvertent transfer of contaminated fluids to noncontaminated drainage systems can occur, it is safety-related in this area. D. If a failure or malfunction in a portion of the system could affect safety-related (i.e., necessary for safe shutdown, accident prevention, or accident mitigation) SSCs adversely, it is safety-related in this area. The reviewer applies the above criteria to determine which EFDS portions have safety functions or can adversely affect safety-related systems. These EFDS safety-related portions are then reviewed on the basis of the subsection II criteria as described in the following paragraphs. 2. The SAR EFDS performance requirements section is reviewed for whether it describes component allowable operational degradation (e.g., drain blockage, sump pump leakage, or failures) for safety-related system portions and the procedures followed to detect and correct these conditions if they become excessive. The reviewer determines whether safety-related system portions can sustain the loss of any active component and meet minimum system requirements. The system P&IDs, layout drawings, and component descriptions and characteristics are then reviewed for whether safety-related 9.3.3-7 Revision 3 - March 2007 EFDS portions are identified correctly and can be isolated from the nonsafety-related portions to the extent required for system performance. 3. The reviewer verifies whether system safety functions will be maintained, as required, in adverse environmental phenomena (e.g., earthquakes) or in certain pipe breaks. The reviewer evaluates the system, using engineering judgment, failure modes and effects analyses, and the results of reviews under other SRP sections, for whether: A. Failure of nonsafety-related portions of the system or of other systems not designed to seismic Category I standards and located close to safety-related portions of the system or of nonseismic Category I structures that house, support, or bound