1、 KSKSKSKSKSKSKSK KSKSKS KSKSK KSKS KSK KS KS A ISO 7476 KS A ISO 7476:2012 2012 12 12 http:/www.kats.go.krKS A ISO 7476:2012 : ( ) ( ) () ( ) : () () ( ) ( ) ( ( ) ( ( ) : (http:/www.standard.go.kr) ： ：2012 12 12 2012-0698 ： ：() ( 02-509-7270) (http:/www.kats.go.kr). 10 5 , . KS A ISO 7476:2012 i ii
2、 . iii 1 1 2 1 3 1 4 1 5 2 6 2 7 2 8 3 9 .5 10 5 11 5 12 .5 A( ) .6 KS A ISO 7476:2012 ii . , , . , , . KS A ISO 7476:2012 iii 2003 2 ISO 7476, Nuclear fuel technology Determination of uranium in uranyl nitrate solutions of nuclear grade quality Gravimetric method , . KS A ISO 7476:2012 Nuclear fuel
3、 technology Determination of uranium in uranyl nitrate solutions of nuclear grade quality Gravimetric method 1 1 kg 100 g . . 2 . . ( ) . KS A ISO 10980:2012, 3 (90010) C U3O8 U3O8 (87525) C . 910 C . 4 , , . 0.1 % , . 900 C U3O8 . 0.1 % 0.2 % . . KS A ISO 7476:2012 2 , . 5 . 5.1 (ashless filter-pap
4、er powder) 50 % 5.2 , c(HNO3)16 mol/L( 1.42 g/mL) 5.3 , c(HNO3) 3 mol/L 5.4 KS A ISO 10980:2012 A 0.05 % NBL CRM 112 A CETAMA MU2 100 g/kg . 6 . 6.1 , 15 mL 30 mL 6.2 6.3 6.4 6.5 , (90010) C . 3. (87525) C . . 6.6 6.7 , 0.05 mg . 7 7.1 (6.1) 900 C 10 . (1 .) 0.1 mg . 0.1 mg . m1 . 7.2 1 g 3 g 15 g K
5、S A ISO 7476:2012 3 . 0.1 mg ( m2, m3) . 7.3 1 mL 2 mL . 7.4 - (5.1) . . . - 2 mL , . - . 7.5 100 C 30 900 C . 7.6 (6.5) 890 C 910 C 1 . (1 .) 0.1 mg . 0.1 mg . m4 . 900 C (87525) C . 7.7 U3O8 . 7.8 (5.3) . (5.2) . 8 8.1 ms . ms m2 m3 m2 ： . m3： . 8.2 m0 . m0 m4 m1 m1 ： ( ) . m4 ： . , msm4 . KS A IS
6、O 7476:2012 4 8.3 ( ) . =nnnCwmms6i10 ms： (8.1 ) . wn ： (7.7 ) n . Cn ： n , A . 8.4 U3O8 . mc m0 mi m0 ： U3O8 . mi： (8.3 ). 8.5 CU . (O)8(U)3(U)3rrrUAAAC+= Ar(O) ： 15.999 4 , Ar(U) ： Ar(U) aiAi ai ： i Ai ： i ( 1 ) 1 i Ai234 234.040 9 235 235.043 9 236 236.045 6 238 238.050 8 Ar(U) . Ar(U)iiAw1 wi： i
7、U wi . KS A ISO 7476:2012 5 =iiiiiAwAaw 8.6 wU . sUc3U10mCmw= 9 (5.4) 10 g . 4 0.1 % . 2 . 0.15 % . 10 0.05 % . ( ) 0.05 % ( ) 0.1 % . 50 % 0.10 % ( ) 25 % 0.25 % ( - ) 10 % 0.65 % ( ) 11 0.1 % , 0.05 % , (air-thrust) 0.1 % . 0.1 % . 12 . a) b) c) ( ) d) e) f) (8.2 ) KS A ISO 7476:2012 6 A ( ) , CnA
8、g Ag 1.00 Al Al2O31.89 Am AmO21.13 B B2O33.22 Ba BaO 1.12 Be BeO 2.78 Bi Bi2O31.11 Ca CaO 1.40 Cd Cd 1.00 Co CoO 1.27 Cr Cr2O31.46 Cu Cu 1.00 Fe Fe3O41.38 K K2O 1.21 Mg MgO 1.66 Mn Mn3O41.39 Na Na2O 1.35 Ni Ni2O31.40 P P2O52.29 Pb PbO 1.07 M2O31.16 Sb Sb2O31.20 Si SiO22.14 Sn SnO 1.13 Ta Ta2O51.22 T
9、h ThO21.14 Ti TiO21.67 V V2O51.78 W WO31.26 Zn ZnO 1.24 Zr ZrO21.35 . . 0.1 % . 153787 1 92 3(13) (02)26240114 (02)262401489 http:/ Korean Agency for Technology and Standards http:/www.kats.go.kr KS A ISO 7476:2012 KSKSKS SKSKS KSKS SKS KS SKS KSKS SKSKS KSKSKS Nuclear fuel technology Determination of uranium in uranyl nitrate solutions of nuclear grade qualityGravimetric method ICS 27.120.30
