Document: NUREG-0800
Document ID: 988a555f-fdfa-4452-829d-c06654bfbba5
Document Type: srp
Title: Initial Plant Test Program - Design Certification and New License Applicants
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0706/ML070660618.pdf
Revision Date: 2023-06
Chapter: 14
Section ID: 14.2
CFR Part: 
CFR Title: 

Content:
ect to the non-Class 1E portions of the electrical system (powering the balance of plant (BOP) loads), a brief certified design description may be included. The DD for this portion should focus on the aspects, if any, needed to support the Class 1E portion. Therefore, based on the above, the following equipment should be treated in the DD: A. Overall Class 1E electric distribution system. This would include any high level treatment for cables, breakers, disconnect switches, switchgear, metal enclosed bus, load centers, motor control centers, motor starters, relays, protective devices, distribution transformers, and connections/terminations. B. Power sources including the following: - Offsite, including feeds from the main generator (a generator breaker to allow backfeed should be addressed), main power transformers, unit auxiliary transformers (UATs), reserve auxiliary transformers (RATs), etc. - DC system - batteries/battery chargers - Emergency diesel generator (EDG), including load sequencing, and EDG support systems. Plant Systems Branch has lead responsibility for EDG support systems. (This may be included for passive designs also due to risk-significance.) - Class 1E vital AC inverters, regulating transformers, transfer devices - Alternate AC (AAC) power sources for Station Blackout (SBO) 14.3-50 March 2007 C. Other Electrical Features including the following: - Containment electrical penetrations - Cable Ampacity and derating criteria - Cable Tray Loading criteria. D. Lightning protection. General configuration type check. E. Grounding. Configuration type check. For both lightning protection and grounding, it is expected that this should be part of a inspection to check that the features exist. No analyses to demonstrate adequacy need be in ITAAC. F. Lighting - emergency control room, remote shutdown panel NOTE:It may be difficult to rationalize its inclusion based on "accomplishing a direct safety function." The basis has to be more defense-in-depth and