Document: NUREG-0800
Document ID: d52a97d0-a519-4817-9ad6-64d94c9518af
Document Type: srp
Title: DATA COMMUNICATION SYSTEMS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1515/ML15159B177.pdf
Revision Date: 2023-06
Chapter: 7
Section ID: 7.9
CFR Part: 
CFR Title: 

Content:
that support protection system functions (RTS, SRP Section 7.2, or ESFAS, SRP Section 7.3): 7.9-10 Draft Revision 6 - August 2015 Based on the review of system functions, the staff concludes that the DCS conforms to the design basis requirements of (IEEE Std 603-1991 or IEEE Std 279-1971) and 10 CFR 50.34(f). Setpoint analyses account for measurement inaccuracies attributable to the DCS in accordance with the guidance of RG 1.105. The staff concludes that the DCS adequately supports RTS and ESFAS functions as necessary to sense accident conditions and anticipated operational occurrences in order to initiate protective actions consistent with the accident analysis presented in Chapter 15 of the SAR and evaluated in the SER. Therefore, the staff finds that the DCS appropriately supports RTS and ESFAS compliance with the requirements of GDC 20. The DCS conforms to the guidelines for periodic testing in RG 1.22, “Periodic Testing of Protection System Actuation Functions,” and RG 1.118, “Periodic Testing of Electric Power and Protection Systems.” The bypassed and inoperable status indication conforms to the guidelines of RG 1.47, “Bypassed and Inoperable Status Indication for Nuclear Power Plant Safety Systems.” The DCS conforms to the guidelines on the application for the single-failure criterion in IEEE Std 379, “IEEE Standard Application of the Single-Failure Criterion to Nuclear Power Generating Station Safety Systems,” as supplemented by RG 1.53, “Application of the Single- Failure Criterion to Nuclear Power Plant Protection Systems.” Based on the review, the staff concludes that the DCS satisfies the requirement of (IEEE Std 603-1991 or IEEE Std 279- 1971) with regard to the system reliability and testability. Therefore, the staff finds that the DCS satisfies these requirements of GDC 21. Based on the review of software development plans and the inspections of the computer development process and design outputs, the staff concludes that the