Document: NUREG-0800
Document ID: d9e9d0a9-6390-4154-94dc-7d5e6d8145cd
Document Type: srp
Title: A-C POWER SYSTEMS (ONSITE)
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052350489.pdf
Revision Date: 2023-06
Chapter: 8
Section ID: 8.3.1
CFR Part: 
CFR Title: 

Content:
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 EI' quality assurance classification. In the review of other areas associated with the a-c.onsite power system, the PS . will coordinate other branches evaluations that interface with the overall review of the system as follows: The Auxiliary Systems Branch (ASB), evaluates the adequacy of those auxiliary systems that are vital to the proper operation and/or protection of the a-c power system as part of its primary review responsibility for SRP Section 9.4. This includes such systems as the heating and ventilation systems provided to maintain a controlled environment-for safety-related'instrumentation and electric equip- ment. In particular, ASB determines that the piping, ducting, and dampering for these heating and ventilation systems are adequate. In addition, the ASB examines the physical arrangement of components and structures for Class lE systems and their supporting auxiliary systems, to determine that single events and accidents will not 8.3.1-3 Rev. 2 - July 1981 disable redundant features as part of its primary review responsibility for SRP Sections 3.4.1, 3.5.1.1, 3.5.2, and 3.6.1. The ASB determines those system components requiring electric power as a function of time for each mode of reactor operation and accident condition as part of its primary review responsibility for SRP Sections 6.7, 9.1.3, 9.1.4, 9.2, 9.3, 9.4, 9.5.1, 10.4.7, and 10.4.9. The Containment Systems Branch (CSB) evaluates the adequacy of those containment ventilation systems provided for maintaining a controlled environment for safety-related electrical equipment located inside the containment as part of its primary review responsibility for SRP Section 6.2.2. The CSB determines those system components requiring electric power as a function of time for each mode of reactor operation and accident