@inproceedings{6409b250ad1544b5829e83aec0a883c5,
title = "Analysis of newly proposed setpoint methods",
abstract = "A new methodology for evaluating the operability of safety critical instrumentation has been proposed. Common to the prior method, a limiting trip setpoint (LSP) is determined to protect the analytical limit by considering uncertainties inherent in the measurement process. Channel operability is assured by periodically performing a channel operability test (COT) which compares the as-found trip point to the previous as-left trip point and evaluates the deviation. Licensees can include an additional conservative margin which results in a nominal trip setpoint (NSP) versus the LSP. If the setting tolerance is small as compared to the deviation limit, an alternate operability test can be applied that compares the as-found trip point to the LSP (or NSP as applicable) rather than the as-left trip setpoint. This method does not provide the actual channel deviation for operability determination so a penalty term may be appropriate. This paper provides an analysis of the alternate channel operability test and provides recommendations for setting a penalty term to reduce the non-conservativeness of the alternate channel operability test to a pre-defined value so as to preserve the required confidence level of the uncertainty analysis.",
author = "Hines, {J. Wesley} and Miller, {Don W.} and Arndt, {Steven A.}",
year = "2006",
language = "English",
isbn = "0894480510",
series = "5th International Topical Meeting on Nuclear Plant Instrumentation Controls, and Human Machine Interface Technology (NPIC and HMIT 2006)",
pages = "1131--1138",
booktitle = "5th International Topical Meeting on Nuclear Plant Instrumentation Controls, and Human Machine Interface Technology (NPIC and HMIT 2006)",
note = "5th International Topical Meeting on Nuclear Plant Instrumentation Controls, and Human Machine Interface Technology (NPIC and HMIT 2006) ; Conference date: 12-11-2006 Through 16-11-2006",
}