Document: NUREG-0800
Document ID: a8dee0cd-6529-4ac9-b659-26bda40aba48
Document Type: srp
Title: INFORMATION SYSTEMS IMPORTANT TO SAFETY
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1515/ML15159B138.pdf
Revision Date: 2023-06
Chapter: 7
Section ID: 7.5
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Content:
review procedures are based on the identified SRP acceptance criteria. For deviations from these specific acceptance criteria, the staff should review the applicant’s evaluation of how the proposed alternatives to the SRP criteria provide an acceptable method of complying with the relevant NRC requirements identified in Subsection II. SRP Section 7.1 describes the general procedures to be followed in reviewing any I&C system. SRP Section 7.5 highlights specific topics that should be emphasized in the review of information systems important to safety. The systems addressed below may be implemented either as stand-alone systems or integrated as part of other systems. If the information systems are not isolated from the protection systems, they should also be evaluated according to the criteria in SRP Section 7.2 or 7.3, as appropriate. Other information systems (e.g., plant computer and severe accident monitoring) may be included in the review. The acceptance criteria for such systems depend on the function of the system and the applicable design criteria. Any exceptions or deviations to accident monitoring instrumentation designed to satisfy RG 1.97 should be identified in the SAR. This includes acceptable deviations and clarifications identified in BTP 7-10. 1. The review should include an evaluation of the information systems design against the guidance of IEEE Std 603-1991 or IEEE Std 279-1971, depending on the applicant or licensee’s commitment regarding these design criteria. For computer-based information systems important to safety, guidance is provided by IEEE Std 7-4.3.2 as endorsed by RG 1.152. These procedures are detailed in SRP Appendix 7.1-B for IEEE 7.5-8 Draft Revision 6 – August 2015 Std 279-1971, SRP Appendix 7.1-C for IEEE Std 603-1991, and SRP Appendix 7.1-D for IEEE Std 7-4.3.2. The reviewer should consider the overall information system functions at the system level. The design should be compatible with the SAR Chapter 15 design bases