OSCILLATION POWER RANGE MONITOR AND METHOD OF CHECKING SOUNDNESS THEREOF
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United States of America Patent
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Issued Date -
Jan 17, 2013
app pub date -
Jan 20, 2012
filing date -
Jan 21, 2011
priority date (Note) -
Abandoned
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Abstract
An oscillation power range monitor has: an averaging section that assigns a plurality of LPRM readings input filtered to remove noise thereof from local power range monitors to calculate cell average value of the LPRM readings assigned to each cell; a time average processing section that calculates a cell time average value from the average value of each cell; a normalized cell value computing section that computes the normalized cell value for each cell from the cell time average value and the cell average value; a trip determining section that receives the normalized cell value, monitors oscillations of each cell output and outputs a scram trip when the normalized cell value exceeds a predetermined value; and an abnormality determining section that assigns a plurality of LPRM readings input and determines abnormality of each LPRM reading assigned to each cell based on the oscillations of the LPRM reading.
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