Document: NUREG-0800
Document ID: 9fa7092c-7628-402d-9028-6601d5f5fdfb
Document Type: srp
Title: DC POWER SYSTEMS (ONSITE)
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0705/ML070550063.pdf
Revision Date: 2023-06
Chapter: 8
Section ID: 8.3.2
CFR Part: 
CFR Title: 

Content:
evaluate the identification scheme used to distinguish among redundant Class 1E systems, associated circuits assigned to redundant Class 1E divisions, non-Class 1E systems, and their associated cables and raceways without the necessity for consulting reference materials. 5. Vital Supporting Systems. The staff will review the instrumentation, control circuits, and power connections of vital supporting systems to determine whether they are designed to the same criteria as those for the safety-related loads and the power systems that they support. This will include an examination of the vital supporting system 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. System Testing and Surveillance. The staff will review the proposed means for monitoring the status of the dc power system and vital supporting system operability to ensure that these systems perform their intended functions. In addition, the staff will review the onsite testing capability to ensure conformance to the requirements of GDC 18. 7. Other Review Areas. The reviewer will determine whether the dc system and vital supporting systems meet the following: A. The systems and their components have the appropriate seismic design classification. B. The systems and their components are housed in a seismic Category I classified structure. C. The systems and their components are designed to withstand environmental conditions associated with normal operation, natural phenomena, and postulated accidents. D. The systems and their components have a Class 1E quality assurance classification. E. The systems and their components are of sufficient capacity and capability to cope with an SBO, as required by 10 CFR 50.63. 8. Inspections, Tests, Analyses, and Acceptance Criteria (ITAAC). For design certification (DC) and combined license (COL)