Document: NUREG-0800
Document ID: 644c1fee-247e-4265-9466-5876937a7120
Document Type: srp
Title: INFORMATION SYSTEMS IMPORTANT TO SAFETY
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0705/ML070550086.pdf
Revision Date: 2023-06
Chapter: 7
Section ID: 7.5
CFR Part: 
CFR Title: 

Content:
Advanced Light Water Reactor (ALWR) Designs,” provides guidance on Diversity and Defense-in-Depth. SRP BTP 7-19 provides additional guidance. 7.5-7 Revision 5 - March 2007 5. Regulatory Guide 1.97, Revision 2, 3, and 4, describe methods acceptable to the NRC staff for providing instrumentation to monitor variables for accident conditions. For plants with operating licenses issued before June 2006, Regulatory Guide 1.97, Revision 2 and 3, are still effective. Licensees of these plants may, however, convert to the criteria of Revision 4 or use the criteria of Revision 4 when performing modifications that do not involve a conversion. The guidance contained in Regulatory Position 1 of Regulatory Guide 1.97, Revision 4, should be followed in these cases. Plants that obtained an operating license after June 2006 should reference the guidance of Regulatory Guide 1.97, Revision 4. SRP BTP 7-10 provides guidance on the application of Regulatory Guide 1.97. III. REVIEW PROCEDURES The reviewer will select material from the procedures described below, as may be appropriate for a particular case. Typical reasons for a non-uniform emphasis are the introduction of new design features or the utilization in the design of features previously reviewed and found acceptable. These 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