STATISTICAL STUDY OF CONDUCTIVITY PROBE SIGNALS: SPACE-TIME CORRELATION ANALYSIS IN ELEVATED TEMPERATURE AND PRESSURE TRANSIENT TEST FACILITY
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A scaled test facility of the Babcock & Wilcox raised loop nuclear steam supply system was used to perform small break loss-of-coolant accident testing, thereby, establishing a data base from which plant predictive system codes could be benchmarked. About 250 instruments were used to record the thermal/hydraulic response of the test facility during the transient, of which 36 were conductivity probes. TTiese probes were designed and installed to determine the liquid-steam interface in the facility hot leg, reactor core vessel, and steam generator components. Statistical behavior of the conductivity probe output signals is studied. Auto-correlation and cross-correlation analysis of nonstationary signals produced by spatially separated probes are presented. A conditional sampling technique is utilized to study the statistical behavior of the probe transient response taken over short time periods during similar events. This technique is employed since long term averaging tends to obscure some important events during a full transient study. © 1986, MCB UP Limited. All rights reserved.
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