Open AccessOPERATIONAL INVESTIGATION OF NUCLEAR INSTRUMENTATION. CORE I, SEED 2. Test Results (T-643725). Section 2
Author(s) -
Not Given Author
Publication year - 1961
Language(s) - English
Resource type - Reports
DOI - 10.2172/4046828
Subject(s) - instrumentation (computer programming) , section (typography) , range (aeronautics) , core (optical fiber) , coolant , nuclear engineering , environmental science , nuclear physics , physics , engineering , computer science , operating system , aerospace engineering , optics
The test data indicate that the response of the Intermediate-Range log- level-current instrumentation was linear between 5 x 10/sup -//sup 1//sup 1/ to 5 x 10/sup -//sup 7/ amperes for start-up rates of 0.2 to 1.0 decsdes per minute based on the as sumption that the reactor trsnsient behavior can be predicted by the reactor kinetic equation. A comparison of the intermediate range start-up rate readings with the start-up rates determined from the slope of the intermediate-range log-level current as a function of time curves indicates that the intermediate-range start-up rate circuitry was properly aligned. The power inception point, determined from the intermediate-range log-level current and reactor coolant-temperature data, occurred at an average log-level current of 5 x 10/sup -//sup 7/ amperes, assuming that all of the heat of the pumps was disposed of by venting steam to atmosphere. The decade overlap of the intermediate range into the source range varied from 0.95 to 1.95 source range decades with an average overlap of 1.1 decades. The hot-to-cold attenuation, ratio of a source- range flux level (cps) at a primary coolant temperature of 500 deg F to source- range flux level (cps) at a primary coolant temperature of 135 deg F, was determined to be approx 2.3. (auth