Document: NUREG-0800
Document ID: 9cfc38bf-7808-446e-a43d-4ca9ff55df2a
Document Type: srp
Title: AC POWER SYSTEMS (ONSITE)
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1007/ML100740289.pdf
Revision Date: 2023-06
Chapter: 8
Section ID: 8.3.1
CFR Part: 
CFR Title: 

Content:
s are examined to verify that they are powered from the same redundant distribution system as the system that they support. The reviewer will also verify that the auxiliary supporting systems that are associated with the emergency diesel engine - such as the fuel oil storage and transfer system, cooling water system, starting air system, and lubrication system - are in accordance with the acceptance criteria. The organization responsible for plant systems reviews the other aspects of the auxiliary supporting systems to verify that the design, capacities, and physical independence of these systems are adequate for their intended functions. Included is a review of the 8.3.1-32 Revision 4 - May 2010 heating, and ventilation, and air conditioning (HVAC) systems identified as necessary to Class 1E systems, such as the HVAC systems for the electrical switchgear and diesel generator rooms. The organization responsible for the review of plant systems will verify the adequacy of the HVAC system design to maintain the temperature and relative humidity in the room necessary for proper operation of the safety equipment during both normal and accident conditions. It will also verify that redundant HVAC systems are located in the same enclosure as the redundant unit they serve or are separated in accordance with the same criteria as those for the systems they support. 7. System Testing and Surveillance In ensuring that the proposed periodic onsite testing capabilities of the onsite ac power system satisfies the requirements of GDC 18 and the positions of RGs 1.9 and 1.118, the descriptive information, functional logic diagrams, and electrical schematics are reviewed to verify that the design has the built-in capability to permit integral testing of Class 1E systems on a periodic basis when the reactor is in operation. Basic criteria relevant to the review of the surveillance and testability of safety-related aspects of the ac power system are also described in IEEE Std. 603 as