Document: NUREG-0800
Document ID: ed02b850-92b8-49b0-bb93-6c21528c5133
Document Type: srp
Title: EMERGENCY DIESEL ENGINE STARTING SYSTEM
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0705/ML070550034.pdf
Revision Date: 2023-06
Chapter: 9
Section ID: 9.5.6
CFR Part: 
CFR Title: 

Content:
SS failures occurring in one unit will not propagate to other units of the site. 4. GDC 17 requires an onsite electric power system for the functioning of SSCs important to safety. GDC 17 requires the onsite electric power system to have sufficient independence and redundancy to perform their safety functions, assuming a single failure. GDC 17 requirements provide assurance that electric power will be available for systems necessary (i) to prevent fuel damage in anticipated operational occurrences and (ii) to maintain core cooling and containment integrity in postulated accidents. III. REVIEW PROCEDURES The reviewer will select material from the procedures described below, as may be appropriate for a particular case. These review procedures are based on the identified SRP acceptance criteria. For deviations from these acceptance criteria, the staff should review the applicant’s evaluation of how the proposed alternatives provide an acceptable method of complying with the relevant NRC requirements identified in Subsection II. 1. The interfacing reviewers review the seismic design bases and the quality and seismic classifications as indicated in subsection I of this SRP section. The primary reviewer assures that essential EDESS portions, including the isolation valves separating essential and nonessential portions, are classified Quality Group C and seismic Category I. SAR component and system descriptions of mechanical and performance 9.5.6-7 Revision 3 - March 2007 characteristics are reviewed for whether the seismic and quality classifications are included and whether the piping and instrumentation drawings (P&IDs) indicate any points of change at the system or system component interfaces. 2. The reviewer establishes whether the EDESS description and P&IDs clearly delineate all modes of operation and include the means for monitoring, indicating, and controlling receiver air pressure as required by the engine starting service. The P&IDs are reviewed to determine