Document: NUREG-0800
Document ID: ac3185c1-0851-4b4d-b3f5-31c884360119
Document Type: srp
Title: Setpoints
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1601/ML16019A088.pdf
Revision Date: 2023-06
Chapter: 7
Section ID: 7.2
CFR Part: 
CFR Title: 

Content:
ry Position 1 of RG 1.97. Revision 4 to RG 1.97 represents a significantly different approach to the topic from the previous revisions. Revision 4 is based on IEEE Std 497, which establishes flexible, performance-based criteria for the selection, performance, design, qualification, display, and quality assurance of accident monitoring variables. There is no prescriptive list of accident monitoring parameters or associated functional requirements on a parameter-by-parameter basis. The evaluation of instrumentation for monitoring environs conditions and radiation monitoring systems is addressed in the review of other sections of the SAR. SRP Section 7.5 and BTP 7-10 describe the review of accident monitoring instrumentation. Appendix 7.1-A-30 Revision 6 – August 2016 (g) RG 1.105 (endorses Part 1 of ISA-S67.04), “Setpoints for Nuclear Safety-Related Instrumentation”). Applicability - All I&C systems. Review Methods - RG 1.105 provides a basis for evaluating conformance to GDC 13 and IEEE Std 279-1971, Clause 3. The guidance applies equally to IEEE Std 603-1991, Clause 6.8. SRP BTP 7-12 provides guidance for establishing and maintaining instrument setpoints. RG 1.105 and Part 1 of International Society of Automation (ISA)-S67.04 provide guidance for establishing setpoints for trip functions. Nevertheless, their guidance is equally relevant to accounting for measurement uncertainties when determining the indicated plant conditions at which emergency procedures will require operator action, determining the setpoint for interlock functions, and determining setpoints for control functions provided to maintain plant variables and systems within prescribed operating ranges. Therefore, the guidance of RG 1.105 is useful in reviewing all I&C systems important to safety even if no automatic trip functions are involved. (h) RG 1.118, “Periodic Testing of Electric Power and Protection Systems” (endorses American National Standards Institute (ANSI)/IEEE Std 338,