Document: NUREG-0800
Document ID: bb233b69-c637-41e8-9774-95be0cc8b117
Document Type: srp
Title: STATION SERVICE WATER SYSTEM
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0705/ML070550056.pdf
Revision Date: 2023-06
Chapter: 9
Section ID: 9.2.1
CFR Part: 
CFR Title: 

Content:
failure mode and effects analyses, and the results of reviews under other SRP sections to verify whether: A. The failure of portions of the system or of other systems not designed to seismic Category I and located close to essential portions of the system or of non-seismic Category I structures that house, support, or are in close proximity to essential SWS portions do not preclude their operation. Reference to SAR Chapter 2 describing site features and the general arrangement and to layout drawings is necessary as well as to the SAR tabulation of seismic design classifications for structures and systems. SAR statements that the above conditions are met are acceptable. B. Essential SWS portions are protected from the effects of floods, hurricanes, tornadoes, and internally- or externally-generated missiles. Flood protection and missile protection criteria are evaluated in detail under the SRP Section 3 series. The reviewer utilizes the procedures in these SRP sections for assurance that the analyses presented are valid. A statement to the effect that the system is located in a tornado-, missile-, and flood-protected seismic Category I structure or that system components are in individual cubicles or rooms that withstand the effects of both flooding and missiles is acceptable. The location and the design of the system, structures, and pump rooms (cubicles) are reviewed for whether the protection is adequate. 9.2.1-9 Revision 5 - March 2007 C. The SWS pumps have sufficient available net positive suction head at the pump suction locations with low water levels. Reference to SRP Section 2.4, which indicates the lowest probable water level of the heat sink, and to drawings indicating the elevation of service water pump impellers, is necessary. An independent calculation verifying the applicant’s conclusion is necessary for acceptance. D. There are provisions to detect and control leakage of radioactive contamination into and out of the system. The design is acceptable