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:
of reliability that may result from implementing such design provisions. In addition, where the proposed design provides for portions of the onsite dc system to cope with a station blackout event, the capability and capacity of the batteries and system is verified as adequate to withstand and recover from an event of specified duration.9 4. Identification The means proposed for identifying the dc power system components, including cables and cable trays, as safety-related equipment in the plant are reviewed. Also, the identification scheme used to distinguish between redundant cables and raceways of the power system is reviewed. 8.3.2-3 DRAFT Rev. 3 - April 1996 5. Vital SupportingAuxiliary Supporting Systems/Features10 The instrumentation, control circuits, and power connections of vital supportingauxiliary supporting systems and features are reviewed to determine that they are designed to the 11 same criteria as those for the safety-related loads and power systems that they support. This will include an examination of the vital supportingauxiliary supporting system 12 component redundancy; power feed assignment to instrumentation, controls, and loads; initiating circuits; load characteristics; equipment identification scheme; and design criteria and bases for the installation of redundant cables. 6. Surveillance and Testing The means proposed for monitoring the status of system operability are reviewed. Periodic onsite testing capability is reviewed. 7. Other Review Areas The dc system is reviewed to determine that: (a) The system and its components have the appropriate seismic design classification. (b) The system and its components are housed in a structure with seismic Category I classification. (c) The system and its components are designed to withstand environmental 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