Document: NUREG-0800
Document ID: c6dbe9ec-b58d-4a77-85ee-47b58571c3c0
Document Type: srp
Title: Revision 6 - August 2016
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1601/ML16019A200.pdf
Revision Date: 2023-06
Chapter: 7
Section ID: 7
CFR Part: 
CFR Title: 

Content:
in RIS 2006-17. • Basis for selection of the trip setpoint. • Uncertainty terms that are addressed. • Method used to combine uncertainty terms. • Justification of statistical combination. • Relationship between instrument and process measurement units. • Data used to select the trip setpoint, including the source of the data. • Assumptions used to select the trip setpoint (e.g., ambient temperature limits for BTP 7-12-9 Revision 6 – August 2016 equipment calibration and operation, potential for harsh accident environment). • Instrument installation details and bias values that could affect the setpoint. • Correction factors used to determine the setpoint (e.g., pressure compensation to account for elevation difference between the trip measurement point and the sensor physical location). • Instrument test, calibration or vendor data, as-found and as-left; with each instrument should be demonstrated to have random drift by empirical and field data and evaluation results should be reflected appropriately in the uncertainty terms, including the setpoint methodology. The design, installation, calibration procedures, and calibration activities for specific channels may be inspected to gain further confidence that setpoint calculations are consistent with plant equipment and calibration procedures. NRC Inspection Manual, Procedure 93807, “Systems Based Instrumentation and Control Inspection,” provides guidance for such inspections. C. REFERENCES 1. American National Standards Institute/National Conference of Standards Laboratory, ANSI/NCSL Z540-1-1994, “Calibration Laboratories and Measuring and Test Equipment - General Requirements.” New York, NY. 2. Institute of Electrical and Electronics Engineers, IEEE Std 279-1971, “Criteria for Protection Systems for Nuclear Power Generating Stations,” Piscataway, NJ. 3. Institute of Electrical and Electronics Engineers, IEEE Std 498-1990, “IEEE Standard Requirements for the Calibration and