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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REVIEW RESPONSIBILITIES Primary - Organization responsible for the review of instrumentation and controls Secondary - None Review Note: The revision numbers of Regulatory Guides (RG) and the years of endorsed industry standards referenced in this Standard Review Plan (SRP) section are centrally maintained in SRP Section 7.1-T, “Regulatory Requirements, Acceptance Criteria, and Guidelines for Instrumentation and Control Systems Important to Safety,” (Table 7-1). Therefore, the individual revision numbers of RGs (except RG 1.97) and years of endorsed industry standards are not shown in this section. References to industry standards incorporated by reference into regulation (IEEE Std 279-1971 and IEEE Std 603-1991) and industry standards that are not endorsed by the agency do include the associated year in this section. See Table 7-1 to ensure that the appropriate RGs and endorsed industry standards are used for the review. 7.9-2 Revision 6 - August 2016 I. AREAS OF REVIEW The objectives of the review are to confirm that data communication systems (DCSs): (1) conform to applicable acceptance criteria and guidelines, (2) will perform the safety functions assigned to them, (3) will meet the reliability and availability goals assumed for the system, and (4) will tolerate the effects of random transmission failures. A particular concern is that the transmission of multiple signals over a single path may constitute a single point of failure that may have a larger impact on plant safety than would occur in previous analog systems. The scope and depth of the review and the acceptance criteria will vary according to the importance to safety of the system that the DCS is supporting. 1. This SRP section describes the review process and acceptance criteria for DCSs that are part of or support the systems described in SRP Sections 7.2 through 7.8 of the applicant’s safety analysis report (SAR). The DCSs may include multiplexers and more general communication systems. The