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:
al values. 10. The ITAAC should be consistent in the use of present or future tense. 11. “Division” should be used instead of train, loop, or subsystem (unless it is a subsystem). 12. ITAAC should be written clearly to avoid the use of clarifying phrases. 13. The correct system name should be used consistently. 14.3-49 March 2007 ELECTRICAL SYSTEMS REVIEW CHECKLIST This section is intended to provide additional guidance for evaluating Tier 1 system design descriptions (DDs), figures, and ITAAC in the electrical area (for purposes of review responsibility the electrical area also includes the Lighting Systems). The following information should be included in Tier 1 information in a consistent order. 1. Design Descriptions and Figures Electrical equipment that is involved in performing the direct safety function should be addressed in the Design Description (see Institute of Electrical and Electronics Engineers-308- 1980 paragraph 5.2 for a discussion of direct safety function). This would basically include (in Tier 1) the complete Class 1E electric system - including power sources (which include offsite sources even though they are not Class 1E) and distribution equipment. With regard to the electrical equipment that is part of the Class 1E system but is included to improve the reliability of the individual Class 1E divisions (for example equipment protective trips), additional factors need to be considered. For example, if a failure or false actuation of a feature such as a protective device could prevent the safety function, and operating experience has shown problems related to this feature; then treatment in Tier 1 should probably be included. In addition, some fire protection analyses are based on the ability of breakers to clear fire caused faults. With respect 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