Document: NUREG-0800
Document ID: eb1d19c1-686c-42f5-ba0a-c417c7b12b8e
Document Type: srp
Title: DC POWER SYSTEMS (ONSITE)
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070499.pdf
Revision Date: 2023-06
Chapter: 8
Section ID: 8.3.2
CFR Part: 
CFR Title: 

Content:
tal conditions associated with normal operation, natural phenomena, and postulated accidents. (d) The system and its components have a "Class 1E" quality assurance classification. (e) Station blackout events are addressed in the design of dc power systems.13 Review Interfaces14 EELB also performs the following reviews under the SRP sections indicated: 1. Reviews the adequacy of the offsite and onsite ac power system, including ac power sources, safety-related ac distribution systems, and ac instrumentation and control power systems, as part of its primary review responsibility for SRP Sections 8.2 and 8.3.1.15 2. In accordance with SRP Section 8.4 (proposed), the overall compliance with 10 CFR 50.63 requirements is reviewed including the adequacy of the station blackout analysis, the duration for which the plant will be able to withstand or cope with, and recover from a station blackout event, and the adequacy of dc system power supplies that are not a part of the onsite dc power system reviewed under SRP Section 8.3.2 with respect to the specified station blackout event/duration.16 DRAFT Rev. 3 - April 1996 8.3.2-4 In the review of other areas associated with the dc onsite power system, the PSBEELB will 17 coordinate other branches' evaluations that interface with the overall review of the system, as follows: 1. The Auxiliary Systems Branch (ASB) Plant Systems Branch (SPLB) evaluates the 18 adequacy of those auxiliary supporting systems that are vital to the proper operation 19 and/or protection of the dc power system as part of its primary review responsibility for Standard Review Plan (SRP) Sections 9.4.1 through 9.4.5 . This includes such 20 21 systems as the heating and ventilation systems for load center, battery, battery charger, and inverter rooms. In particular, the ASBSPLB determines that the piping, ducting, 22 and valving arrangements of redundant vital auxiliary supporting systems meet the 23 single failure criterion. 2. In addition, theThe ASBSPLB