Document: NUREG-0800
Document ID: dd687b37-3f26-4512-91d8-633ddb655821
Document Type: srp
Title: DATA COMMUNICATION SYSTEMS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1602/ML16020A097.pdf
Revision Date: 2023-06
Chapter: 7
Section ID: 7.9
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Content:
e 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 7.9-11 Revision 6 - August 2016 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 computer systems conform to the guidance of RG 1.152. Therefore, the special characteristics of computer systems have been adequately addressed, and the staff finds that the DCS satisfies these requirements of GDC 21. The DCS functions were included in the staff’s review of diversity and defense-in-depth analysis for RTS and ESFAS. Based on this review, the staff concludes that the protection systems, including the DCS functions, comply with the criteria for defense against common-cause failure in