Document: NUREG-0800
Document ID: b3d7a8f7-62f4-4ace-b8c7-32606edaa8f5
Document Type: srp
Title: CONTROL SYSTEMS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1515/ML15159B161.pdf
Revision Date: 2023-06
Chapter: 7
Section ID: 7.7
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Content:
al Instrument and Control Systems,” of the Staff Requirements Memorandum on SECY-93-087, “Policy, Technical, and Licensing Issues Pertaining to Evolutionary and Advanced Light Water Reactor (ALWR) Designs,” provides guidance on Defense-in-Depth and Diversity. SRP BTP 7- 19 provides additional guidance. 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 acceptance criteria, the staff should review the applicant’s evaluation of how the proposed alternatives 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. This part of SRP Section 7.7 highlights specific topics that should be emphasized in the review of control systems. 1. The control systems review should address the applicable topics identified in SRP Table 7-1. SRP Appendix 7.1-A describes review methods for each topic. Major design considerations that should be emphasized in the review of the control systems are identified below. • Design bases - The review should confirm that the control systems include the necessary features for manual and automatic control of process variables within prescribed normal operating limits. • Safety classification - The review should confirm that the plant accident analysis in Chapter 15 of the SAR does not rely on the operability of any control system function to assure safety. • Effects of control system operation upon accidents - The review should confirm that the safety analysis includes consideration of the effects of both control 7.7-6 Draft Revision 6 –