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:
e dc power system. 4. Regulatory Guide 1.81, as it relates to the sharing of structures, systems, and components of the dc power system. Regulatory Position C.1 states that multi-unit sites should not share dc systems. 5. Regulatory Guide 1.128, as it relates to the installation of vented lead-acid storage batteries in the onsite dc power system. 6. Regulatory Guide 1.129, as it relates to maintenance, testing, and replacement of vented lead-acid storage batteries in the onsite dc power system. 7. Regulatory Guide 1.118, as it relates to the capability to periodically test the onsite dc power system. 8. Regulatory Guide 1.153, as it relates to the design, reliability, qualification, and testability of the power, instrumentation, and control portions of safety systems of nuclear plants, including the application of the single failure criterion in the onsite dc power system. As endorsed by Regulatory Guide 1.153, IEEE Std. 603 provides a method acceptable to the staff to evaluate all aspects of the electrical portions of the safety-related systems, including basic criteria for addressing single failures. However, as stated in 10 CFR 55a(h), all plants are not required to comply with IEEE Std. 603. Only applications filed on or after May 13, 1999, for preliminary and final design approvals (10 CFR Part 52, Appendix O), design certification, and construction permits; operating licenses and combined licenses that do not reference a final design approval or design certification must meet the requirements for safety systems in IEEE Std. 603-1991 and the correction sheet dated January 30, 1995. Operating nuclear power plants are encouraged, but not required to, comply with IEEE Std. 603 for future system-level modifications. 9. Regulatory Guide 1.53, as it relates to the application of the single-failure criterion. 8.3.2-9 Revision 3 - March 2007 10. Regulatory Guide 1.63, as it relates to the capability of electric penetration assemblies in containment structures to