Annual Report for NERI Proposal No.2000-0109 on Forewarning of Failure in Critical Equipment at Next-Generation Nuclear Power Plants

Hively, LM

Oak Ridge National Laboratory

关键词: Safety Engineering;    Electric Motors;    Forecasting;    Distribution Functions;    Reactor Cooling Systems;   

DOI  :  10.2172/814382
RP-ID  :  ORNL/TM-2001/195
RP-ID  :  AC05-00OR22725
RP-ID  :  814382

美国|英语

来源: UNT Digital Library

【 摘 要 】

This annual report describes the first year's accomplishments under the NERI2000-109 project. We present a model-independent approach to quantify changes in the nonlinear dynamics underlying time-serial data. From time-windowed data sets, we construct discrete distribution functions on the phase space. Condition change between base case and test case distribution functions is assessed by dissimilarity measures via L{sub 1}-distance and {chi}{sup 2} statistic. The discriminating power of these measures is first tested on noiseless model data, and then applied for detecting dynamical change in power from a motor-pump system. We compare the phase-space dissimilarities with traditional linear and nonlinear measures used in the analysis of chaotic systems. We also assess the potential usefulness of the new measures for robust, accurate, and timely forewarning of equipment failure.