KS A ISO 9978-2012 Radiation protection－Sealed radioactive sources－Leakage test methods《辐射防护 密封辐射源 泄漏试验法》.pdf

1、 KSKSKSKSKSKSKSK KSKSKS KSKSK KSKS KSK KS KS A ISO 9978 KS A ISO 9978： 2012 2012 11 23 http:/www.kats.go.krKS A ISO 9978:2012 : ( ) ( ) () ( ) : () ( ) () ( ) () () () () ( ) () () : (http:/www.standard.go.kr) ： ：2003 12 6 ：2012 11 23 2012-0633 ： ：() ( 02-509-7270) (http:/www.kats.go.kr). 10 5 , . K

2、S A ISO 9978:2012 i ii . iii 1 1 2 1 3 .1 4 3 5 5 5.1 5 5.2 .5 5.3 6 6 7 6.1 .7 6.2 .8 6.3 9 A( ) .10 A.1 10 A.2 10 A.3 .10 B( ) 12 KS A ISO 9978:2012 ii . , , . , , . KS A ISO 9978:2012 iii 1992 1 ISO 9978, Radiation protection Sealed radioactive sourcesLeakage test methods . KS A ISO 9978:2012 Rad

3、iation protection Sealed radioactive sources Leakage test methods 1 . . . KS A ISO 2919 (prototype sealed radioactive source) A . . , , IAEA . 2 . . ( ) . KS A ISO 2919:2012, 3 . 3.1 (sealed radioactive source) / KS A ISO 9978:2012 2 . / (leak tightness) . “ ” “ ” . 3.2 (leaktight) 1 3.3 (capsule) ,

4、 3.4 (dummy sealed source) , . . 3.5 (simulated sealed source) , . , . (tracer) . 3.6 (model designation) 3.7 (prototype sealed source) 3.8 (quality control) , KS A ISO 2919 3.9 (production control) 3.10 (recurrent inspections) ( ) KS A ISO 9978:2012 3 3.11 (leakage) 3.12 (non-leachable) (KS A ISO 2

5、919 ) 3.13 (standard helium leakage rate) 105Pa5103Pa 103Pa 296 K7 K (23 7 ) ; 1 Pam3s1135136scmatm10smPa10 3105.7 lusec . 4 . , 5. 6. ( A ). (1. ), . (wipe test) . , 1 . , . 10 Pam3s1 , 0.1 Pam3s1 , 12 2 kBq(50 nCi) . 2 . 298 K(25 ) 107 atmcm3s1 10 2atm 1 atm . , , . . , . KS A ISO 9978:2012 4 , (：

6、 ) , , . , . , 1 , Bq kBq ( ) 5.1.1 10 1 0.2 0.2 ( ) 5.1.2 10 1 0.2 0.2 5.1.3 10 1 0.2 0.2 5.2.1 4 0.4 a0.2 (222Rn/12 h) 5.2.2 0.4 0.004 a0.2 (222Rn/12 h) 5.3.1 10 1 0.2 0.2 5.3.2 10 1 0.2 0.2 13smPa 6.1.1 10-2 10-41 10-2 6.1.2 1 10-21 10-2 6.2.1 1 b1 c 6.2.2 1 bc 6.2.3 1 b1 c 6.2.4 10-2 b10-2 , g 6

7、.3 10 50 ca b . c . KS A ISO 9978:2012 5 5 5.1 5.1.1 ( ) , . 5 % . 323 K5 K(50 5 ) 4 . . . , 343 K5 K (70 5 ) 30 . 5.1.2 ( ) , . 10 . 1 . , . . 5.1.3 3 . . . 5.1.4 1) . 293 K5 K(20 5 ) 24 . . 5.1.5 0.2 kBq(5 nCi) . 5.2 5.2.1 ( -226 ) , , (gastight) 3 . . . 1) . , .KS A ISO 9978:2012 6 5.2.2 ( -226 )

8、 5.1.3 . 5.2.3 ( -85 ) 24 . -85 . 7 . 5.2.4 5.2.1 5.2.3 . 5.2.5 5.2.1 5.2.2 , 12 0.2 kBq(5 nCi) . 12 , . 5.2.3 5.2.4 , 4 kBq/24 h(100 nCi/24 h) . 5.3 , ( ) . , 7 . , , , . 5.3.1 . . . 5.3.2 . -60 . , . 5.3.3 KS A ISO 9978:2012 7 0.2 kBq (5 nCi) . 3., b) . 6 , . , , . IAEA . , . 6.1 6.3 , . , 6.1 . .

9、 , 6.3 (free volume) 0.1 cm3 . 0.1 cm3 , 9. , (6.1) . 6.1 6.1.1 , . . 5 % . . 6.1.2 . . . . . 6.1.1 . Q , L . KS A ISO 9978:2012 8 VpptLQo22= (1) po 1.01325105Pa 1 t p( 0.5 MPa 10 MPa ), 10 0.1 cm3 V . VptLQ235.0= (2) Q : (Pam3s1) L : 1 Pam3s1 10 Pam3s1 ( ptQVL /7.1 ) 2 (2) . , , . 6.1.3 , 1 Pam3s1

10、10 2Pam3s1 . 6.2 . . , . 6.2.1 , , , , 1 . 5 cm . 15 kPa 25 kPa . 1 . 6.2.2 (ambient temperature) . 363 K 368 K(90 95 ) 5 cm . 393 K 423 K . 1 . 2 . KS A ISO 9978:2012 9 6.2.3 2 , 5 . 1 MPa 15 . , , , 5 cm . 1 . 6.2.4 5 . ( ) . 1 . 6.2.5 6.2.1 6.2.4 , 1 Pam3s1 . 6.3 . . . 50 g , . . , 5 . KS A ISO 2

11、919 3, 4, 5 6 . KS A ISO 9978:2012 10 A （） ( , ) , . A.1 . . A.1 A.1 . A.2 KS A ISO 2919 . , . A.1 . A.3 , . . , . . . a) . , (5.3) . . b) , , . , KS A ISO 9978:2012 11 . 0.2 kBq2)(5 nCi) , . . c) , , A.1 . . , . A.1 2 2 A (5.1) (5.3) (5.1) (5.3) A1 , ： A2 , ： A3 , (3H, 226Ra ) (5.1) (6.1) (6.2) (5.1) (6.1) (6.2) A4 226Ra (5.2) (5.1) (5.2) (5.1) A5 (6.1) (5.3.2) (5.1) (6.1) (6.2) B A3, A4 A5 (5.1) (6.1) (6.2) C (6.1) (6.2) 2) 0.2 kBq .