Document: NUREG-0800
Document ID: 92ba0daf-489d-4f71-82db-d6d781c71573
Document Type: srp
Title: as an aid for establishing consistency and comprehensiveness in the review of the systems.
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070664.pdf
Revision Date: 2023-06
Chapter: 14
Section ID: 14.3
CFR Part: 
CFR Title: 

Content:
to support the non-safety plant systems, Design Descriptions cover portions of the non-Class 1E electrical systems. A basic configuration ITAAC may be utilized to verify the functional arrangement and Tier 1 design commitments for these areas. Technical Rationale: In addition to meeting the requirements for ITAAC under 10 CFR Part 52, the technical rationale for application of the above acceptance criteria to Tier 1 is discussed in the following paragraphs. 1. Compliance with GDC 17, in part, requires that an onsite and an offsite electric power system be provided to permit functioning of structures, systems and components important to safety. It further requires that the onsite electric power system have independence and redundancy and the electric power supplied by the offsite system be supplied by two physically independent circuits. This provides a reasonable assurance that the facility will function reliably in the event of a fault in an area of the electrical design. 2. Compliance with 10 CFR 50.49 requires that certain electrical equipment be qualified for accident (referred to as harsh) environments. This provides a reasonable assurance that the equipment needed in the event of an accident will perform its intended function. 3. Compliance with 10 CFR 50.63 requires that a nuclear power plant be able to withstand and recover from a station blackout event. This ensures that the plant can withstand and recover from this event safely. 4. Compliance with IEEE 308 "IEEE Standard Criteria for Class 1E power Systems for Nuclear Power Generating Stations," in conjunction with other related IEEE standards, establish specific design criteria for nuclear power plant electrical systems and equipment. This provides a reasonable assurance that the electrical systems will perform their intended function in the anticipated operational environment. III. REVIEW PROCEDURES 1. Follow the general procedures for review of Tier 1 contained in the Review Procedures section of SRP