報告書番号

E283006

タイトル（和文）

ACOUSTIC LEAK DETECTION IN PIPING SYSTEMS

タイトル（英文）

ACOUSTIC LEAK DETECTION IN PIPING SYSTEMS

概要 （図表や脚注は「報告書全文」に掲載しております）

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概要 （英文）

TO MONITOR A HIGH-PRESSURE PIPING OF NUCLEARPOWER PLANTS,A POSSIBILITY OF ACOUSTIC LEAK DETECTION METHOD HAS BEEN EXPERIMENMTALLY STUDIED IN PRACTICAL FIELD TESTS AND LABORATORY TESTS.CHARACTERISTICS OF BACKGROUND NOISE IN FIELD TEST AND THE RESULTS OF EXPERIMENT ARE SUMMARIZED AS FOLLOWS;(1)THE LEVEL OF BACKGROUND NOISE IN PRIMARY LOOP(PWR)WAS ALMOST CONSTANT UNDER ACTUAL PLANT OPERATION.BUT ITIS POSSIBLE THAT IT RISES DEPENDING ON THE CONDITION OF THE PRESSURE IN PRIMARY LOOP.(2)BASED ON MANY EXPERIENCES OF LABORATORY TESTS AND PRACTICAL FIELD TESTS,THE LEAK MONITORING SYSTEM FOR PRACTICAL FIELD WAS DESIGNED AND DEVELOPED.TO IMPROVE THE RELIABILITY,A JUDGMENT OF LEAK ON THIS SYSTEM IS FORMED BY USING THREE FACTORS OF NOISE LEVEL,DURATION TIME OF PHENOMENA AND FREQUENCY SPECTRUM OF NOISE SIGNAL EMITTED FROM LEAK POINT.

報告者

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