KS C IEC 60988-2012 Nuclear power plants-Instrumentation important to safety- Acoustic monitoring systems for detection of loose parts characteristics design criteria and operation.pdf

1、 KSKSKSKSKSKSKSK KSKSKS KSKSK KSKS KSK KS KS C IEC 60988 , KS C IEC 60988:2012 2012 11 23 http:/www.kats.go.krKS C IEC 60988:2012 : ( ) ( ) () ( ) : () () ( ) () () () ( ) () () : (http:/www.standard.go.kr) ： ：2006 9 30 ：2012 11 23 2012-0633 ： ：() ( 02-509-7270) (http:/www.kats.go.kr). 10 5 , . KS C

2、 IEC 60988:2012 i . iii . iv 1 1 2 1 3 .1 4 3 4.1 .3 4.2 3 4.3 4 5 .4 5.1 4 5.2 6 5.3 7 5.4 7 5.5 10 5.6 .12 6 12 6.1 .12 6.2 13 6.3 .13 7 .14 7.1 .14 7.2 .14 7.3 15 7.4 15 7.5 .16 8 17 A( ) .18 B( ) .23 C( ) 24 D( ) 27 30 1 5 A.1 .19 A.2 ( ) .20 KS C IEC 60988:2012 ii A.3 ( ) 20 A.4 BWR.21 A.5 PWR.

3、22 C.1 .24 C.2 .25 D.1 28 D.2 28 D.3 - 29 D.4 .29 KS C IEC 60988:2012 iii . , , . , , . KS C IEC 60988:2012 iv 2009 2 IEC 60988, Nuclear power plants Instrumentation important to safety Acoustic monitoring systems for detection of loose parts： characteristics, design criteria and operational procedu

4、res . . KS C IEC 60988:2012 , Nuclear power plants Instrumentation important to safetyAcoustic monitoring systems for detection of loose parts: characteristics, design criteria and operational procedures 1 . 2 . . ( ) . KS C IEC 61226, KS C IEC 61513, 3 . 3.1 (adaptive resonant frequency) (： , ) 3.2

5、 (alarm level monitor) . . 3.3 (background noise) . . KS C IEC 60988:2012 2 3.4 (burst amplitude distribution) 3.5 (burst interval distribution) 3.6 (delay difference) 3.7 (detached part) 3.8 (known event) (： , ) . . . 3.9 (loose part) 3.10 (loosened part) 3.11 (monitored signal) 3.12 (resonance fac

6、tor) 3.13 (single channel alarm inhibit) . . 3.14 (single sound event) (： , ) KS C IEC 60988:2012 3 3.15 (sound burst) , . . 3.16 (sound sensor) , / 3.17 (stationary background noise) (： , ) (： ) . 3.18 (structure-borne sound) . . 4 4.1 1 , , 1 . . . 1 . 1 ( ) . a) b) c) . . , . 4.2 KS C IEC 60988:2

7、012 4 1 . . ( ) . . . . . . , . . . . . . . 1 . . 4.3 , . , , . A . 5 5.1 ( 1 ). . KS C IEC 60988:2012 5 1 8 2 9 3 10 4 11 5 12 6 ( ) 13 7 1 . 2 . 3 KS C IEC 61513 KS C IEC 61226 . 1 B , . ( ) . . fa 0.5 Hz 1 kHz fb 10 kHz 20 kHz , fa fb 3 dB 3 dB . fb 20 kHz . , 1 dB . KS C IEC 60988:2012 6 5.2 5.2

8、.1 (piezoelectric transducer) . (： , ) . . (： , ) . . . (： , ) . (： , , ) . . . . . . , 2 . 2 3 (： ). , . . 2 . . . . . , . . / . . 5.2.2 ( ) . ( ) . , , . . 10 % KS C IEC 60988:2012 7 . 10 % . . 5.3 5.3.1 . . . . 5.1 . . 5.3.2 . ： 24 dB/ ： 1 dB ： fa f fb . ( ) . 5.3.3 . . . 5.3.4 , (amplifier with

9、variable gain) . 10 dB 4 . 5.4 5.4.1 KS C IEC 60988:2012 8 . (raw signal), (signal envelope) RMS(root mean square) . RMS . RMS (： RMS ) . RMS . ： 0.7fa f 1.5fb ： 5 ： 10 % ： 1 s 0.5 Vpeak . . , . 6 6.1 . . . 1 , ( ) . , , KS C IEC 60988:2012 13 . 50 % . . . (7.5.4 ). 6.2 1 . , . . (： ) . . 6.3 . ( )

10、(5.3.2 ) . . , a) 15 % 35 % . 5 , (5.5.2 ). . . (7.5 8. ). (： RMS 5 ms) (： RMS 1 s) . . . , . 0.5 % 5 % . , RMS 5 % 15 % . . (： RMS 5 ) . KS C IEC 60988:2012 14 . . ( ) b) , . . 7 7.1 . ( ) ( ) . a) . b) (7.5.3 ). 7.2 . ( , 7.5.4 ) ( ) . . , . RMS , (50 dB , 5 %), . , . . ( D ). (： ) . KS C IEC 60988:2012 15 , ( ) . 7.3 7.3.1 . . (： 1 , 3 ) . , . . . , (： ) . . . 7.3.2 . . 6.3 . . (： 1 , 3 ) . . , (： 3 1 ) . . , . . 7.4 . ID ： , . KS C IEC 60988:2012 16 . .