56 27 29 25 41 17 61 40 34 23 68 62 19 84 72 86 58 28 35 81 53 52 42 47 66 65 75 5 87 76 39 21 22 46 54 8 73 82 30 13 15 7 38 Deviation (%) GL and GH samples 2009 50 0 -50 Arvic Harms National Physical Laboratory 20 January 2010 Radionuclides in GL and GH 8 nuclides: 60Co, 65Zn, 85Sr, 125Sb, 133Ba, 134Cs, 137Cs Participants: GL GH 50 40 (2008: 55) (2008: 44) and 152Eu ‘False’ positives GL 40K 57Co 125I 2 1 1 (background) (152Eu) (125Sb) 1 1 1 (?) (125Sb) (X-ray from 152Eu?) GH 113Sn 125I 129I GL composition (Bq kg-1) 60Co 65Zn 85Sr 125Sb 133Ba 134Cs 137Cs 152Eu NPL Labs t-test Ratio 5.035(12) 5.50(4) 7.01(5) 1.366(7) 3.571(25) 14.02(10) 4.47(3) 1.789(12) 5.05(4) 5.63(5) 7.18(6) 1.372(24) 3.44(3) 13.15(7) 4.59(4) 1.773(23) 0.39 2.07 2.19 0.25 -3.31 D -7.12 D 2.53 -0.61 1.00 1.02 1.02 1.00 0.96 0.94 1.03 0.99 GH composition (Bq g-1) 60Co 65Zn 85Sr 125Sb 133Ba 134Cs 137Cs 152Eu NPL Labs t-test Ratio 5.418(12) 5.92(4) 7.54(5) 1.470(7) 3.84(3) 15.09(11) 4.81(4) 1.925(13) 5.36(3) 5.92(4) 7.60(5) 1.438(12) 3.76(3) 14.51(9) 4.89(3) 1.901(13) -1.67 0.04 0.82 -2.34 -2.35 -4.11 D 1.73 -1.30 0.99 1.00 1.01 0.98 0.98 0.96 1.02 0.99 GL and GH in agreement (%) GL 60Co 65Zn 85Sr 125Sb 133Ba 134Cs 137Cs 152Eu 82 74 64 56 84 72 88 58 GH (69) (-) (-) (-) (71) (65) (76) (69) (x) refers to 2008 values 73 60 68 73 65 63 78 68 (70) (-) (-) (-) (57) (68) (68) (55) Results GL 72% 12% 5% 11% ‘in agreement’ ‘questionable’ ‘discrepant’ ‘missing’ (2008) 68% 15% 13% 4% 68% 9% 18% 4% ‘in agreement’ ‘questionable’ ‘discrepant’ ‘missing’ 61% 22% 14% 3% GH 83 118 100 82 110 72 124 26 86 27 18 35 46 62 23 29 25 41 74 111 58 114 121 88 119 28 53 61 123 47 39 42 51 65 19 76 117 89 122 95 91 10 8 17 15 126 5 40 59 31 Deviation (%) Co-60 GL 50 0 -50 83 7 124 116 100 76 93 86 45 17 88 25 15 18 48 13 46 120 8 108 32 89 38 5 28 10 35 123 27 55 59 104 31 77 117 47 82 16 58 126 Deviation (%) Co-60 GH 50 0 -50 31 83 111 118 100 89 82 47 114 29 86 40 124 18 110 10 42 19 62 46 76 28 35 58 26 65 74 17 25 5 95 23 15 53 88 123 121 41 72 27 119 59 39 122 51 61 91 8 117 126 Deviation (%) Zn-65 GL 50 0 -50 31 83 124 116 86 7 100 45 18 93 76 46 48 25 88 15 32 123 38 13 10 47 59 17 104 108 89 5 28 120 35 77 82 27 55 16 58 8 117 126 Deviation (%) Zn-65 GH 50 0 -50 31 83 118 17 100 121 18 47 74 110 65 10 40 25 46 62 124 19 95 58 72 89 35 61 23 53 26 29 111 88 28 41 5 122 91 42 119 86 123 114 15 8 82 76 27 117 51 126 59 39 Deviation (%) Sr-85 GL 50 0 -50 7 31 83 124 116 100 45 88 86 25 55 89 120 17 32 48 46 93 76 35 28 13 47 77 5 10 15 108 59 18 38 104 123 8 16 117 82 58 126 27 Deviation (%) Sr-85 GH 50 0 -50 5 8 17 31 35 40 41 47 59 62 74 76 83 88 100 111 118 124 86 25 121 95 82 58 28 29 122 65 18 19 42 114 61 23 119 123 91 53 117 46 89 110 51 26 15 39 72 126 10 27 Deviation (%) Sb-125 GL 50 0 -50 31 83 124 100 116 86 117 45 88 93 108 13 120 47 5 35 76 17 18 28 89 59 46 32 15 27 55 77 25 10 123 8 38 48 104 16 82 58 126 7 Deviation (%) Sb-125 GH 50 0 -50 31 83 118 100 62 18 114 76 28 110 19 46 88 40 42 124 86 111 121 27 119 126 17 53 74 58 41 82 10 95 47 29 8 89 65 72 61 122 23 15 123 26 5 51 35 25 91 117 39 59 Deviation (%) Ba-133 GL 50 0 -50 31 83 118 100 62 18 114 76 28 110 19 46 88 40 42 124 86 111 121 27 119 126 17 53 74 58 41 82 10 95 47 29 8 89 65 72 61 122 23 15 123 26 5 51 35 25 91 117 39 59 LCS Ba-133 GL 50 0 -50 31 83 124 7 116 100 15 93 45 108 28 82 76 88 5 86 8 10 13 120 77 18 55 25 38 48 46 32 17 47 27 59 35 89 126 123 16 117 104 58 Deviation (%) Ba-133 GH 50 0 -50 31 26 100 41 27 19 28 89 124 82 111 61 35 119 18 95 88 62 17 29 121 10 91 117 118 110 72 83 53 46 42 47 74 86 23 15 76 58 114 126 25 65 40 123 39 122 51 5 59 8 Deviation (%) Cs-134 GL 50 0 -50 31 26 100 41 27 19 28 89 124 82 111 61 35 119 18 95 88 62 17 29 121 10 91 117 118 110 72 83 53 46 42 47 74 86 23 15 76 58 114 126 25 65 40 123 39 122 51 5 59 8 LCS Cs-134 GL 50 0 -50 31 16 124 7 76 100 116 93 28 120 89 108 86 88 5 27 17 10 48 13 46 83 18 32 77 38 25 55 15 35 8 59 104 45 47 123 126 117 82 58 Deviation (%) Cs-134 GH 50 0 -50 31 16 124 7 76 100 116 93 28 120 89 108 86 88 5 27 17 10 48 13 46 83 18 32 77 38 25 55 15 35 8 59 104 45 47 123 126 117 82 58 LCS Cs-134 GH 50 0 -50 89 74 41 110 62 29 18 119 100 121 10 26 39 40 118 58 95 25 65 72 23 88 114 86 46 82 19 5 27 83 28 123 35 53 61 111 47 124 51 8 17 122 91 42 15 117 76 126 59 31 Deviation (%) Cs-137 GL 50 0 -50 124 116 89 100 86 88 93 13 45 76 25 48 46 32 17 55 31 18 28 15 5 47 38 35 8 120 27 59 104 10 108 123 83 77 82 117 16 58 126 7 Deviation (%) Cs-137 GH 50 0 -50 31 35 40 41 47 52 62 83 111 118 122 117 114 76 18 61 19 121 89 119 58 28 124 26 95 46 86 53 91 74 126 42 123 110 29 88 51 65 8 72 23 39 10 15 25 82 100 5 17 27 Deviation (%) Eu-152 GL 50 0 -50 31 83 124 100 10 116 93 76 45 86 27 88 28 13 108 35 120 18 77 89 25 15 46 32 104 5 47 17 38 82 59 117 123 16 8 55 126 58 48 7 Deviation (%) Eu-152 GH 50 0 -50 Thank you
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