JULIAN DEAN, PETER IVANOV, SEAN COLLINS AND MARIA GARCIA MIRANDA
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1 NPL REPORT IR 32 Environmental Radioactivity Proficiency Test Exercise 2013 JULIAN DEAN, PETER IVANOV, SEAN COLLINS AND MARIA GARCIA MIRANDA JULY 2014
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3 Environmental Radioactivity Proficiency Test Exercise 2013 Julian Dean, Peter Ivanov, Sean Collins and Maria Garcia Miranda Acoustics and Ionising Radiation Division ABSTRACT The results of NPL s nineteenth Environmental Radioactivity Proficiency Test Exercise are reported. Eight different sample types were offered: an aqueous mixture of five alpha emitters (designated AL ), a second aqueous mixture of five alpha emitters ( AH ), an aqueous mixture of three beta emitters ( B1 ), an second aqueous beta mixture containing four beta emitters ( B2 ), an aqueous mixture of four gamma emitters ( GL ), a second aqueous mixture of four gamma emitters ( GH ), a peat sample containing four radionuclides ( P ) and a sandy soil sample containing four radionuclides ( S ). A total of 721 results were submitted; 78 % of the results were in agreement with the Assigned Values. NPL is accredited to ISO/CASCO 17043:2010 (Conformity Assessment General Requirements for Proficiency Testing) for this PTE scheme PTE scheme Co-ordinator
4 Queens Printer and Controller of HMSO, 2014 ISSN Issued July 2014 National Physical Laboratory Hampton Road, Teddington, Middlesex, TW11 0LW Extracts from this report may be reproduced provided the source is acknowledged and the extract is not taken out of context. Approved on behalf of NPLML by Professor Patrick Regan, Science Area Leader, Radioactivity Group
5 Assigned Values Nuclide (AH) Assigned Value (Bq g -1 ) 226 Ra ± (± 2.6 %) 237 Np ± 0.32 (± 2.0 %) 238 Pu ± 0.12 (± 0.8 %) 241 Am ± (± 0.8 %) 244 Cm ± 0.12 (± 0.8 %) Nuclide (AL) Assigned Value (Bq kg -1 ) 232 Th ± (± 2.0 %) 234 U 19.3 ± 0.6 (± 2.8 %) 235 U ± (± 2.6 %) 238 U 19.3 ± 0.6 (± 2.8 %) 239 Pu ± (± 0.8 %) Nuclide (B1) Assigned Value (Bq g -1 ) 3 H ± (± 1.4 %) 14 C ± (± 1.0 %) 99 Tc ± (± 1.8 %) Nuclide (B2) Assigned Value (Bq g -1 ) 3 H ± (± 1.4 %) 63 Ni ± (± 2.0 %) 90 Sr ± (± 0.42 %) 241 Pu ± (± 2.2 %) Nuclide (GH) Assigned Value (Bq g -1 ) 60 Co ± 0.06 (± 0.6 %) 133 Ba ± 0.20 (± 1.6 %) 134 Cs ± (± 1.4 %) 137 Cs 8.10 ± 0.12 (± 1.4 %) Nuclide (GL) Assigned Value (Bq kg -1 ) 60 Co ± 0.22 (± 1.6 %) 134 Cs 3.42 ± 0.06 (± 1.6 %) 137 Cs ± (± 1.8 %) 152 Eu 21.9 ± 0.8 (± 3.6 %) UNCERTAINTIES The reported expanded uncertainty is based on a standard uncertainty multiplied by a coverage factor k = 2, providing a coverage probability of approximately 95 %. The uncertainty evaluation has been carried out in accordance with UKAS requirements.
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7 CONTENTS 1. SUMMARY 1 2. TREATMENT OF DATA 2 3. SUMMARY OF PARTICIPANTS RESULTS 4 4. DESCRIPTION OF DEVIATION PLOTS 6 5. ALPHA HIGH (AH) DEVIATION PLOTS 7 6. ALPHA LOW (AL) DEVIATION PLOTS BETA ONE (B1) DEVIATION PLOTS BETA TWO (B2) DEVIATION PLOTS GAMMA HIGH (GH) DEVIATION PLOTS GAMMA LOW (GL) DEVIATION PLOTS PEAT (P) DEVIATION PLOTS SANDY SOIL (S) DEVIATION PLOTS DEVIATION PLOTS AND TABULATED RESULTS ARRANGED BY LAB NUMBER DISCUSSION REFERENCES ACKNOWLEDGEMENTS 186
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9 1. SUMMARY This environmental radioactivity Proficiency Test Exercise (PTE) was the nineteenth in a series of such exercises run by NPL over the last 25 years. The exercises help analysts to identify measurement problems and also support UKAS accreditations in this area, and they are run on an annual basis by NPL. A range of sample types have been made available over the course of these exercises; these have been mostly aqueous in nature, although in recent years solid samples have been included. Eight sample types were made available for analysis in the 2013 PTE: (i) (ii) (iii) (iv) (v) (vi) (vii) (viii) AH: a high-level mixture of five α-emitting radionuclides 20 g of dilute nitric acid (1 20 Bq g 1 per radionuclide) AL: a low-level mixture of five α-emitting radionuclides 500 g of dilute nitric acid (1 20 Bq kg 1 per radionuclide) B1: a mixture of three β-emitting radionuclides 500 g of very dilute NaOH solution (0.1 2 Bq g 1 per radionuclide) B2: a mixture of four β-emitting radionuclides 500 g of dilute nitric acid (0.1 2 Bq g 1 per radionuclide) GH: a high-level mixture of four γ-emitting radionuclides 100 g of dilute nitric acid (1 20 Bq g 1 per radionuclide) GL: a low-level mixture of four γ-emitting radionuclides 500 g of dilute nitric acid (1 30 Bq kg 1 per radionuclide) P: a peat sample containing four radionuclides 100 g (1 20 Bq g -1 per radionuclide) S: a sandy soil sample containing four radionuclides 100 g (0.1 5 Bq g -1 per radionuclide) As in previous years, the main objective was to assess the performance of the participating laboratories. This required the participants to identify (and/or measure) the activity concentrations of the radionuclides present in the samples, whereas the tasks of NPL were to prepare and distribute the samples, to collect, analyse and interpret the results and to compile an exercise report. The Assigned Values for the activity concentrations of the radionuclides in the aqueous sample types were traceable to national standards of radioactivity, which in turn provide traceability at an international level to the ultimate reference point of all measurements (the SI reference value maintained by the Bureau International des Poids et Mesures (BIPM)). Each aqueous sample type was prepared (as a bulk sample) by combining weighed aliquots of standard solutions of the individual radionuclides with a weighed amount of carrier solution and then diluting the mixture further to achieve the target activity concentrations. Dilution factors were measured gravimetrically and were validated by counting sources prepared at the various dilution levels using either liquid scintillation counting or gamma spectrometry. The Assigned Value for each nuclide was calculated by dividing the activity concentration of the original standard solution by the dilution factor(s). The bulk solution was subdivided into (typically) 40 bottles and homogeneity was checked by gamma spectrometry where Page 1 of 186
10 applicable. Solution stability was checked by counting one or more bottles at NPL at regular intervals throughout the course of the PTE. The Assigned Value for each nuclide in the peat sample type was calculated from the data reported by the PTE participants. Firstly, the bulk raw material was procured from Public Health England (Chilton, Oxfordshire, UK). It was spiked in 1984 and had been used for determining soil-to-plant transfer factors. On receipt by NPL, it was visually inspected and homogenised before being oven-dried and sub-divided into bottles. All the bottles were measured by gamma spectrometry at NPL to determine homogeneity, and a subset of the bottles were issued to the participants. On receipt of the participants data, the Assigned Value for a given nuclide was calculated as the Weighted Mean of the Largest Consistent Subset (WM LCS) of the data for that nuclide. The sandy soil bulk sample was procured also from Public Health England and had also been spiked in At NPL, it was processed and measured in the same way as the peat sample, and the Assigned Value for each nuclide present was again calculated from the WM LCS of the reported data. The NPL data analysis method is described in Section 2. Note that, unless otherwise stated, all uncertainties quoted in this report are standard uncertainties multiplied by a coverage factor of k = 1, providing a level of confidence of approximately 68 %. 2. TREATMENT OF DATA The data were analysed using the same methods as in the 2012 exercise (Dean et al., 2013). The deviation D from the assigned value from each laboratory value was calculated from: L N L D = = 1 [1] N N The standard uncertainty (k=1) u D of the deviation was calculated from: 2 2 ul u N u D = + [2] L N L N The quantities zeta (ζ), the relative uncertainty of a laboratory s value (R L ) and the z-score were calculated from: L N ζ = [3] 2 2 u L + u N R L ul = [4] L L N L N z = = σ p N [5] Page 2 of 186
11 where: L is the participant s value; N is the Assigned Value; u L is the standard uncertainty of the participants value; u N is the standard uncertainty of the Assigned Value; σ p is the standard uncertainty for proficiency assessment. The zeta and z-scores were used to determine whether the difference between the participant s value and the Assigned Value was significantly different from zero. The Interquartile Range outlier test (Harms and Gilligan, 2011) was used to determine whether the relative uncertainty R L was significantly larger than the other values in the data set. Note that this test is unable to identify outliers if the data set is smaller than 7. Results for which the absolute values of the zeta score and the z-score are both and for which R L is not significantly larger than the other values in the data set are taken to mean that the participant s value is in agreement with the Assigned Value. These results are plotted as dark blue points in this report. If (i) R L is significantly larger than the other values in the data set, or (ii) the result passes the zeta test but not the z-test (i.e., there is a large deviation from the Assigned Value combined with a large uncertainty), or (iii) the result passes the z-test but not the zeta test (where there is a small deviation from the Assigned Value and a small uncertainty), the participant s value is classified as questionable (plotted in yellow). If the absolute values of both the zeta score and the z-score are greater than 2.576, then the participant s value is classified as discrepant from the Assigned Value (plotted in red), regardless of the value of R L. The factor of used to calculate the z-score is the ratio of 0.15 (i.e. a deviation of 15%) to In other words, a participant value with a deviation D having an absolute value of 15% will pass the z-test. Table 1 Summary of data classification criteria zeta test R L test z test Classification pass pass pass in agreement pass fail pass questionable fail pass pass questionable pass - fail questionable fail - fail discrepant Page 3 of 186
12 3. SUMMARY OF PARTICIPANTS RESULTS In addition to the analyses of individual participants data as described in Section 2, the Weighted Mean of the Largest Consistent Subset (WM LCS) of the reported results for each radionuclide in the aqueous sample types was calculated using the method described previously (Harms and Gilligan, 2011) and then compared with the NPL Assigned Values. The results are given in Tables 2 to 7. The WM LCS of the P and S sample types are also given, in Table 8. Table 2 AH summary Nuclide (AH) NPL Assigned Values (Bq g -1 ) WM LCS (Bq g -1 ) Deviation % Zeta Critical Value 226 Ra ± (± 1.3 %) 1.72 ± 0.03 (± 1.7 %) Np ± 0.16 (± 1.0 %) 17.0 ± 0.4 (± 2.2 %) Pu ± 0.06 (± 0.4 %) ± 0.16 (± 1.0 %) Am ± (± 0.4 %) 4.94 ± 0.05 (± 1.0 %) Cm ± 0.06 (± 0.4 %) ± 0.24 (± 1.8 %) Table 3 AL summary Nuclide (AL) NPL Assigned Values (Bq kg -1 ) WM LCS (Bq kg -1 ) Deviation % Zeta Critical Value 232 Th ± (± 1.0 %) ± (± 1.3 %) U 19.3 ± 0.3 (± 1.4 %) ± 0.08 (± 0.4 %) U ± (± 1.3 %) ± (± 1.9 %) U 19.3 ± 0.3 (± 1.4 %) ± 0.21 (± 1.1 %) Pu ± (± 0.4 %) ± (± 1.6 %) Table 4 B1 summary Nuclide (B1) NPL Assigned Values (Bq g -1 ) WM LCS (Bq g -1 ) Deviation % Zeta Critical Value 3 H ± (± 0.7 %) ± (± 1.0 %) C ± (± 0.50 %) ± (± 1.7 %) Tc ± (± 0.9 %) ± (± 1.4 %) Table 5 B2 summary Nuclide (B2) NPL Assigned Values (Bq g -1 ) WM LCS (Bq g -1 ) Deviation % Zeta Critical Value 3 H ± (± 0.7 %) ± (± 1.0 %) Ni ± (± 1.0 %) 1.57 ± 0.03 (± 1.8 %) Sr ± (± 0.21 %) ± (± 1.1 %) Pu ± (± 1.1 %) ± (± 2.1 %) Page 4 of 186
13 Table 6 GH summary Nuclide (GH) NPL Assigned Values (Bq g -1 ) WM LCS (Bq g -1 ) Deviation % Zeta Critical Value 60 Co ± 0.03 (± 0.3 %) ± 0.04 (± 0.4 %) Ba ± 0.10 (± 0.8 %) ± 0.05 (± 0.4 %) Cs ± (± 0.7 %) ± (± 0.7 %) Cs 8.10 ± 0.06 (± 0.7 %) 8.16 ± 0.04 (± 0.50 %) Table 7 GL summary Nuclide (GL) NPL Assigned Values (Bq kg -1 ) WM LCS (Bq kg -1 ) Deviation % Zeta Critical Value 60 Co ± 0.11 (± 0.8 %) ± 0.07 (± 0.6 %) Cs 3.42 ± 0.03 (± 0.8 %) 3.22 ± 0.03 (± 0.9 %) Cs ± (± 0.9 %) ± (± 1.1 %) Eu 21.9 ± 0.4 (± 1.8 %) ± 0.14 (± 0.7 %) Table 8 P and S summaries Nuclide (P) WM LCS (Bq g -1 ) Nuclide (S) WM LCS (Bq g -1 ) 90 Sr 2.51 ± 0.11 (± 5.0 %) 137 Cs 2.71 ± 0.12 (± 5.0 %) 239 Pu 3.97 ± 0.18 (± 5.0 %) 241 Am 4.35 ± 0.19 (± 5.0 %) 90 Sr ± (± 8 %) 137 Cs 0.80 ± 0.07 (± 8 %) 239 Pu 1.06 ± 0.09 (± 9 %) 241 Am 1.34 ± 0.11 (± 8 %) Page 5 of 186
14 4. DESCRIPTION OF DEVIATION PLOTS Figure 1 below illustrates the format of the deviation plots using some hypothetical values and uncertainties. Results in agreement are represented by dark blue points whereas questionable and discrepant results are given in yellow and red respectively. The error bars represent the standard uncertainties u D (with a coverage factor of k=1). The light blue lines represent z-scores of and (-15 % or +15 % deviation). The dashed line represent the standard uncertainty of the Assigned Value. Table 9 explains the classification of each value. Deviation Example 50 Deviation (%) 0-50 A B C D E F G H I J Figure 1 Deviation plot example Table 9 Data classification Lab Zeta test R L outlier test z test Classification A fail pass fail discrepant B pass pass fail questionable C fail pass pass questionable D pass pass pass in agreement E pass pass pass in agreement F pass fail pass questionable G pass pass pass in agreement H fail pass pass questionable I pass pass fail questionable J fail pass fail discrepant Page 6 of 186
15 5. Alpha High (AH) Deviation Plots Page 7 of 186
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21 6. Alpha Low (AL) Deviation Plots Page 13 of 186
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27 7. Beta One (B1) Deviation Plots Page 19 of 186
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41 10. Gamma Low (GL) Deviation Plots Page 33 of 186
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51 12. Sandy Soil (S) Deviation Plots Page 43 of 186
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57 13. Deviation Plots and Tabulated Results Arranged by Lab Number NOTE: Data are quoted rounded, at k=1 (standard uncertainty). Data analysis was carried out on data as reported (i.e. before rounding). Uncertainties have been rounded such that the significant figures of the standard uncertainty lie between 3 and 25. The standard rules of rounding have been applied, except in cases where rounding down would have reduced the uncertainty by more than 5 %, in which cases the uncertainty was rounded up. Page 49 of 186
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59 Radionuclide Laboratory 1 NPL Assigned Value Deviation /% Zeta Z Score 226 Ra (AH) 1.4 ± 0.3 (± 19 %) ± (± 1.3 %) Np (AH) 17.9 ± 0.6 (± 4 %) ± 0.16 (± 1.0 %) Pu (AH) 15.7 ± 0.3 (± 1.9 %) ± 0.06 (± 0.4 %) Am (AH) 4.61 ± 0.18 (± 4 %) ± (± 0.4 %) Cm (AH) 12.9 ± 0.5 (± 4 %) ± 0.06 (± 0.4 %) Co (GH) ± 0.20 (± 1.8 %) ± 0.03 (± 0.3 %) Ba (GH) 13.2 ± 0.5 (± 4 %) ± 0.10 (± 0.8 %) Cs (GH) 1.85 ± 0.04 (± 2.2 %) ± (± 0.7 %) Cs (GH) 8.10 ± 0.20 (± 2.5 %) 8.10 ± 0.06 (± 0.7 %) H (B2) ± (± 1.4 %) ± (± 0.7 %) Ni (B2) 1.73 ± 0.04 (± 2.3 %) ± (± 1.0 %) Sr (B2) 0.47 ± 0.03 (± 7 %) ± (± 0.21 %) Pu (B2) ± (± 3 %) ± (± 1.1 %) Page 51 of 186
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61 Radionuclide Laboratory 4 NPL Assigned Value Deviation /% Zeta Z Score 234 U (AL) 18.7 ± 2.3 (± 12 %) 19.3 ± 0.3 (± 1.4 %) U (AL) 0.74 ± 0.24 (± 40 %) ± (± 1.3 %) U (AL) 19 ± 3 (± 15 %) 19.3 ± 0.3 (± 1.4 %) Pu (AL) 1.31 ± 0.25 (± 19 %) ± (± 0.4 %) Co (GH) 11.8 ± 0.8 (± 7 %) ± 0.03 (± 0.3 %) Ba (GH) 10.0 ± 0.7 (± 7 %) ± 0.10 (± 0.8 %) Cs (GH) 1.82 ± 0.13 (± 7 %) ± (± 0.7 %) Cs (GH) 8.2 ± 0.6 (± 7 %) 8.10 ± 0.06 (± 0.7 %) Co (GL) 13.8 ± 1.0 (± 7 %) ± 0.11 (± 0.8 %) Cs (GL) 3.19 ± 0.23 (± 7 %) 3.42 ± 0.03 (± 0.8 %) Cs (GL) 1.88 ± 0.14 (± 8 %) ± (± 0.9 %) Eu (GL) 19.3 ± 1.3 (± 7 %) 21.9 ± 0.4 (± 1.8 %) H (B1) 0.95 ± 0.13 (± 14 %) ± (± 0.7 %) H (B2) 1.13 ± 0.16 (± 14 %) ± (± 0.7 %) Cs (P) 2.87 ± 0.21 (± 7 %) 2.71 ± 0.12 (± 5.0 %) Am (P) 5.1 ± 0.4 (± 8 %) 4.35 ± 0.19 (± 5.0 %) Cs (SS) 1.09 ± 0.08 (± 7 %) 0.80 ± 0.07 (± 8 %) Am (SS) 1.69 ± 0.13 (± 8 %) 1.34 ± 0.11 (± 8 %) Page 53 of 186
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63 Radionuclide Laboratory 5.1 NPL Assigned Value Deviation /% Zeta Z Score 60 Co (GH) 11.1 ± 1.1 (± 10 %) ± 0.03 (± 0.3 %) Ba (GH) 11.8 ± 1.2 (± 10 %) ± 0.10 (± 0.8 %) Cs (GH) 2.01 ± 0.20 (± 10 %) ± (± 0.7 %) Cs (GH) 8.3 ± 0.8 (± 10 %) 8.10 ± 0.06 (± 0.7 %) Co (GL) 13.6 ± 1.4 (± 10 %) ± 0.11 (± 0.8 %) Cs (GL) 3.6 ± 0.4 (± 10 %) 3.42 ± 0.03 (± 0.8 %) Cs (GL) 1.95 ± 0.22 (± 11 %) ± (± 0.9 %) Eu (GL) 23.2 ± 2.3 (± 10 %) 21.9 ± 0.4 (± 1.8 %) H (B1) 1.10 ± 0.11 (± 10 %) ± (± 0.7 %) H (B2) 1.28 ± 0.13 (± 10 %) ± (± 0.7 %) Cs (P) 2.41 ± 0.24 (± 10 %) 2.71 ± 0.12 (± 5.0 %) Am (P) 4.0 ± 0.4 (± 10 %) 4.35 ± 0.19 (± 5.0 %) Cs (SS) 0.68 ± 0.07 (± 10 %) 0.80 ± 0.07 (± 8 %) Am (SS) 0.98 ± 0.10 (± 10 %) 1.34 ± 0.11 (± 8 %) Page 55 of 186
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65 Radionuclide Laboratory 5.2 NPL Assigned Value Deviation /% Zeta Z Score 60 Co (GH) 11.1 ± 1.1 (± 10 %) ± 0.03 (± 0.3 %) Ba (GH) 11.8 ± 1.2 (± 10 %) ± 0.10 (± 0.8 %) Cs (GH) 2.01 ± 0.20 (± 10 %) ± (± 0.7 %) Cs (GH) 8.3 ± 0.8 (± 10 %) 8.10 ± 0.06 (± 0.7 %) Co (GL) 13.6 ± 1.4 (± 10 %) ± 0.11 (± 0.8 %) Cs (GL) 3.6 ± 0.4 (± 10 %) 3.42 ± 0.03 (± 0.8 %) Cs (GL) 1.95 ± 0.22 (± 11 %) ± (± 0.9 %) Eu (GL) 23.2 ± 2.3 (± 10 %) 21.9 ± 0.4 (± 1.8 %) H (B1) 1.08 ± 0.16 (± 15 %) ± (± 0.7 %) C (B1) 0.87 ± 0.13 (± 15 %) ± (± 0.50 %) H (B2) 1.12 ± 0.17 (± 15 %) ± (± 0.7 %) Cs (P) 2.41 ± 0.24 (± 10 %) 2.71 ± 0.12 (± 5.0 %) Am (P) 4.0 ± 0.4 (± 10 %) 4.35 ± 0.19 (± 5.0 %) Cs (SS) 0.68 ± 0.07 (± 10 %) 0.80 ± 0.07 (± 8 %) Am (SS) 0.98 ± 0.10 (± 10 %) 1.34 ± 0.11 (± 8 %) Page 57 of 186
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67 Radionuclide Laboratory 7.1 NPL Assigned Value Deviation /% Zeta Z Score 238 Pu (AH) 16.1 ± 0.6 (± 4 %) ± 0.06 (± 0.4 %) Am (AH) 4.48 ± 0.16 (± 4 %) ± (± 0.4 %) Cm (AH) 13.3 ± 0.5 (± 4 %) ± 0.06 (± 0.4 %) U (AL) 18.4 ± 1.3 (± 7 %) 19.3 ± 0.3 (± 1.4 %) U (AL) 0.72 ± 0.07 (± 9 %) ± (± 1.3 %) U (AL) 19.0 ± 1.4 (± 7 %) 19.3 ± 0.3 (± 1.4 %) Pu (AL) 1.35 ± 0.06 (± 5.0 %) ± (± 0.4 %) Co (GH) 11.6 ± 0.6 (± 5.0 %) ± 0.03 (± 0.3 %) Ba (GH) 13.6 ± 1.0 (± 7 %) ± 0.10 (± 0.8 %) Cs (GH) 2.00 ± 0.17 (± 9 %) ± (± 0.7 %) Cs (GH) 8.5 ± 0.4 (± 5.0 %) 8.10 ± 0.06 (± 0.7 %) H (B1) 1.01 ± 0.05 (± 5.0 %) ± (± 0.7 %) C (B1) 1.07 ± 0.13 (± 12 %) ± (± 0.50 %) H (B2) 1.12 ± 0.05 (± 4 %) ± (± 0.7 %) Ni (B2) 1.35 ± 0.07 (± 5.0 %) ± (± 1.0 %) Sr (B2) ± (± 3 %) ± (± 0.21 %) Pu (B2) 0.85 ± 0.05 (± 6 %) ± (± 1.1 %) Sr (P) 2.14 ± 0.07 (± 4 %) 2.51 ± 0.11 (± 5.0 %) Cs (P) 2.49 ± 0.11 (± 5.0 %) 2.71 ± 0.12 (± 5.0 %) Pu (P) 2.54 ± 0.20 (± 8 %) 3.97 ± 0.18 (± 5.0 %) Am (P) 4.14 ± 0.20 (± 5.0 %) 4.35 ± 0.19 (± 5.0 %) Page 59 of 186
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69 Radionuclide Laboratory 7.2 NPL Assigned Value Deviation /% Zeta Z Score 3 H (B1) 0.91 ± 0.14 (± 16 %) ± (± 0.7 %) H (B2) 1.02 ± 0.13 (± 13 %) ± (± 0.7 %) Page 61 of 186
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71 Radionuclide Laboratory 8.1 NPL Assigned Value Deviation /% Zeta Z Score 226 Ra (AH) 1.8 ± 0.5 (± 25 %) ± (± 1.3 %) Np (AH) 16.4 ± 1.1 (± 7 %) ± 0.16 (± 1.0 %) Pu (AH) 17.5 ± 1.3 (± 7 %) ± 0.06 (± 0.4 %) Am (AH) 4.8 ± 0.3 (± 7 %) ± (± 0.4 %) Cm (AH) 13.5 ± 0.8 (± 6 %) ± 0.06 (± 0.4 %) U (AL) 20.1 ± 1.2 (± 6 %) 19.3 ± 0.3 (± 1.4 %) U (AL) 0.78 ± 0.11 (± 14 %) ± (± 1.3 %) U (AL) 20.1 ± 1.0 (± 5.0 %) 19.3 ± 0.3 (± 1.4 %) Pu (AL) 1.42 ± 0.09 (± 7 %) ± (± 0.4 %) Co (GH) ± 0.20 (± 1.8 %) ± 0.03 (± 0.3 %) Ba (GH) 13.2 ± 0.7 (± 5.0 %) ± 0.10 (± 0.8 %) Cs (GH) 1.94 ± 0.06 (± 3 %) ± (± 0.7 %) Cs (GH) 8.5 ± 0.4 (± 4 %) 8.10 ± 0.06 (± 0.7 %) Co (GL) ± 0.23 (± 1.8 %) ± 0.11 (± 0.8 %) Cs (GL) 3.47 ± 0.21 (± 6 %) 3.42 ± 0.03 (± 0.8 %) Cs (GL) 1.72 ± 0.14 (± 8 %) ± (± 0.9 %) Eu (GL) 23.4 ± 0.9 (± 4 %) 21.9 ± 0.4 (± 1.8 %) H (B1) 0.99 ± 0.04 (± 4 %) ± (± 0.7 %) C (B1) 1.07 ± 0.07 (± 7 %) ± (± 0.50 %) Tc (B1) ± (± 3 %) ± (± 0.9 %) H (B2) 0.97 ± 0.04 (± 4 %) ± (± 0.7 %) Ni (B2) 1.51 ± 0.06 (± 4 %) ± (± 1.0 %) Sr (B2) ± (± 4 %) ± (± 0.21 %) Pu (B2) 0.81 ± 0.08 (± 10 %) ± (± 1.1 %) Sr (P) 2.59 ± 0.07 (± 3 %) 2.51 ± 0.11 (± 5.0 %) Cs (P) 2.82 ± 0.16 (± 6 %) 2.71 ± 0.12 (± 5.0 %) Am (P) 4.81 ± 0.21 (± 5.0 %) 4.35 ± 0.19 (± 5.0 %) Sr (SS) ± (± 3 %) ± (± 8 %) Cs (SS) 0.89 ± 0.06 (± 6 %) 0.80 ± 0.07 (± 8 %) Am (SS) 1.32 ± 0.06 (± 5.0 %) 1.34 ± 0.11 (± 8 %) Page 63 of 186
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73 Radionuclide Laboratory 8.2 NPL Assigned Value Deviation /% Zeta Z Score 241 Am (AH) 4.64 ± 0.21 (± 5.0 %) ± (± 0.4 %) U (AL) 20.4 ± 1.0 (± 5.0 %) 19.3 ± 0.3 (± 1.4 %) U (AL) 0.87 ± 0.05 (± 5.0 %) ± (± 1.3 %) U (AL) 20.4 ± 1.0 (± 5.0 %) 19.3 ± 0.3 (± 1.4 %) Tc (B1) ± (± 5.0 %) ± (± 0.9 %) Page 65 of 186
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75 Radionuclide Laboratory 11 NPL Assigned Value Deviation /% Zeta Z Score 137 Cs (P) 2.97 ± 0.06 (± 1.9 %) 2.71 ± 0.12 (± 5.0 %) Am (P) 5.50 ± 0.10 (± 1.9 %) 4.35 ± 0.19 (± 5.0 %) Cs (SS) ± (± 1.9 %) 0.80 ± 0.07 (± 8 %) Am (SS) 1.46 ± 0.03 (± 1.9 %) 1.34 ± 0.11 (± 8 %) Page 67 of 186
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77 Radionuclide Laboratory 14 NPL Assigned Value Deviation /% Zeta Z Score 226 Ra (AH) 1.94 ± 0.17 (± 9 %) ± (± 1.3 %) Pu (AH) 10.8 ± 0.8 (± 7 %) ± 0.06 (± 0.4 %) Am (AH) 3.89 ± 0.22 (± 6 %) ± (± 0.4 %) Cm (AH) 12.0 ± 0.5 (± 4 %) ± 0.06 (± 0.4 %) Page 69 of 186
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79 Radionuclide Laboratory 15 NPL Assigned Value Deviation /% Zeta Z Score 60 Co (GH) ± 0.20 (± 1.8 %) ± 0.03 (± 0.3 %) Ba (GH) ± 0.24 (± 1.9 %) ± 0.10 (± 0.8 %) Cs (GH) 1.90 ± 0.04 (± 2.1 %) ± (± 0.7 %) Cs (GH) 8.26 ± 0.15 (± 1.8 %) 8.10 ± 0.06 (± 0.7 %) Co (GL) 13.6 ± 0.4 (± 2.4 %) ± 0.11 (± 0.8 %) Cs (GL) 3.52 ± 0.14 (± 4 %) 3.42 ± 0.03 (± 0.8 %) Cs (GL) 1.80 ± 0.11 (± 6 %) ± (± 0.9 %) Eu (GL) 23.2 ± 0.6 (± 3 %) 21.9 ± 0.4 (± 1.8 %) Cs (SS) ± (± 0.7 %) 0.80 ± 0.07 (± 8 %) Am (SS) 5.20 ± 0.03 (± 0.6 %) 1.34 ± 0.11 (± 8 %) Page 71 of 186
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81 Radionuclide Laboratory 16 NPL Assigned Value Deviation /% Zeta Z Score 60 Co (GH) 10.9 ± 0.8 (± 7 %) ± 0.03 (± 0.3 %) Ba (GH) 12.9 ± 0.9 (± 7 %) ± 0.10 (± 0.8 %) Cs (GH) 1.81 ± 0.12 (± 7 %) ± (± 0.7 %) Cs (GH) 7.9 ± 0.6 (± 7 %) 8.10 ± 0.06 (± 0.7 %) Co (GL) 13.5 ± 0.9 (± 7 %) ± 0.11 (± 0.8 %) Cs (GL) 3.36 ± 0.23 (± 7 %) 3.42 ± 0.03 (± 0.8 %) Cs (GL) 1.80 ± 0.12 (± 7 %) ± (± 0.9 %) Eu (GL) 21.8 ± 1.5 (± 7 %) 21.9 ± 0.4 (± 1.8 %) H (B1) 1.00 ± 0.09 (± 9 %) ± (± 0.7 %) C (B1) 1.01 ± 0.08 (± 8 %) ± (± 0.50 %) H (B2) 1.07 ± 0.04 (± 4 %) ± (± 0.7 %) Ni (B2) 1.52 ± 0.08 (± 5.0 %) ± (± 1.0 %) Page 73 of 186
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83 Radionuclide Laboratory 17 NPL Assigned Value Deviation /% Zeta Z Score 234 U (AL) 18.8 ± 1.1 (± 6 %) 19.3 ± 0.3 (± 1.4 %) U (AL) 0.80 ± 0.06 (± 8 %) ± (± 1.3 %) U (AL) 18.9 ± 1.2 (± 7 %) 19.3 ± 0.3 (± 1.4 %) Co (GH) 10.7 ± 0.4 (± 3 %) ± 0.03 (± 0.3 %) Ba (GH) 13.2 ± 0.4 (± 3 %) ± 0.10 (± 0.8 %) Cs (GH) 1.82 ± 0.20 (± 11 %) ± (± 0.7 %) Cs (GH) 8.19 ± 0.25 (± 3 %) 8.10 ± 0.06 (± 0.7 %) Co (GL) 11.4 ± 0.6 (± 6 %) ± 0.11 (± 0.8 %) Cs (GL) 2.9 ± 0.3 (± 11 %) 3.42 ± 0.03 (± 0.8 %) Cs (GL) 2.1 ± 0.3 (± 14 %) ± (± 0.9 %) Eu (GL) 20.2 ± 1.3 (± 7 %) 21.9 ± 0.4 (± 1.8 %) H (B1) 1.23 ± 0.16 (± 13 %) ± (± 0.7 %) C (B1) 1.29 ± 0.17 (± 13 %) ± (± 0.50 %) Cs (SS) ± (± 3 %) 0.80 ± 0.07 (± 8 %) Am (SS) 1.37 ± 0.05 (± 4 %) 1.34 ± 0.11 (± 8 %) Page 75 of 186
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85 Radionuclide Laboratory 18 NPL Assigned Value Deviation /% Zeta Z Score 60 Co (GH) 11.0 ± 0.5 (± 5.0 %) ± 0.03 (± 0.3 %) Ba (GH) 13.1 ± 0.7 (± 6 %) ± 0.10 (± 0.8 %) Cs (GH) 1.90 ± 0.09 (± 5.0 %) ± (± 0.7 %) Cs (GH) 8.2 ± 0.4 (± 5.0 %) 8.10 ± 0.06 (± 0.7 %) Co (GL) 12.6 ± 0.6 (± 5.0 %) ± 0.11 (± 0.8 %) Cs (GL) 3.12 ± 0.16 (± 5.0 %) 3.42 ± 0.03 (± 0.8 %) Cs (GL) 5.3 ± 0.3 (± 5.0 %) ± (± 0.9 %) Eu (GL) 18.9 ± 0.9 (± 5.0 %) 21.9 ± 0.4 (± 1.8 %) Page 77 of 186
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87 Radionuclide Laboratory 23 NPL Assigned Value Deviation /% Zeta Z Score 60 Co (GL) 12.8 ± 0.5 (± 4 %) ± 0.11 (± 0.8 %) Cs (GL) 3.4 ± 0.3 (± 9 %) 3.42 ± 0.03 (± 0.8 %) Cs (GL) 1.90 ± 0.20 (± 11 %) ± (± 0.9 %) Eu (GL) 23.8 ± 1.2 (± 5.0 %) 21.9 ± 0.4 (± 1.8 %) Page 79 of 186
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89 Radionuclide Laboratory 25 NPL Assigned Value Deviation /% Zeta Z Score 232 Th (AL) 1.52 ± 0.07 (± 5.0 %) ± (± 1.0 %) U (AL) 19.0 ± 1.4 (± 7 %) 19.3 ± 0.3 (± 1.4 %) U (AL) 0.78 ± 0.09 (± 12 %) ± (± 1.3 %) U (AL) 19.1 ± 1.4 (± 7 %) 19.3 ± 0.3 (± 1.4 %) Pu (AL) 1.21 ± 0.13 (± 11 %) ± (± 0.4 %) Co (GH) 10.4 ± 0.6 (± 6 %) ± 0.03 (± 0.3 %) Ba (GH) 13.4 ± 0.8 (± 6 %) ± 0.10 (± 0.8 %) Cs (GH) 1.82 ± 0.21 (± 12 %) ± (± 0.7 %) Cs (GH) 8.0 ± 0.5 (± 6 %) 8.10 ± 0.06 (± 0.7 %) Co (GL) 13.0 ± 0.8 (± 6 %) ± 0.11 (± 0.8 %) Cs (GL) 3.3 ± 0.4 (± 12 %) 3.42 ± 0.03 (± 0.8 %) Cs (GL) 1.90 ± 0.18 (± 9 %) ± (± 0.9 %) Eu (GL) 24 ± 3 (± 12 %) 21.9 ± 0.4 (± 1.8 %) H (B1) 1.02 ± 0.05 (± 5.0 %) ± (± 0.7 %) C (B1) 1.10 ± 0.07 (± 6 %) ± (± 0.50 %) Tc (B1) ± (± 8 %) ± (± 0.9 %) H (B2) 1.18 ± 0.05 (± 5.0 %) ± (± 0.7 %) Ni (B2) 1.49 ± 0.10 (± 7 %) ± (± 1.0 %) Sr (B2) 0.49 ± 0.04 (± 7 %) ± (± 0.21 %) Pu (B2) 1.53 ± 0.15 (± 10 %) ± (± 1.1 %) Page 81 of 186
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91 Radionuclide Laboratory 26 NPL Assigned Value Deviation /% Zeta Z Score 232 Th (AL) 1.58 ± 0.08 (± 5.0 %) ± (± 1.0 %) U (AL) ± 0.08 (± 0.4 %) 19.3 ± 0.3 (± 1.4 %) U (AL) 0.73 ± 0.06 (± 8 %) ± (± 1.3 %) U (AL) 19.7 ± 0.8 (± 4 %) 19.3 ± 0.3 (± 1.4 %) Pu (AL) 1.40 ± 0.06 (± 5.0 %) ± (± 0.4 %) Sr (SS) 0.80 ± 0.12 (± 15 %) ± (± 8 %) Cs (SS) 1.06 ± 0.05 (± 5.0 %) 0.80 ± 0.07 (± 8 %) Pu (SS) 1.34 ± 0.25 (± 19 %) 1.06 ± 0.09 (± 9 %) Am (SS) 1.01 ± 0.16 (± 16 %) 1.34 ± 0.11 (± 8 %) Page 83 of 186
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93 Radionuclide Laboratory 32.1 NPL Assigned Value Deviation /% Zeta Z Score 226 Ra (AH) 1.99 ± 0.13 (± 7 %) ± (± 1.3 %) Np (AH) 14.6 ± 0.3 (± 2.0 %) ± 0.16 (± 1.0 %) Am (AH) 5.05 ± 0.12 (± 2.4 %) ± (± 0.4 %) Co (GH) ± 0.23 (± 2.1 %) ± 0.03 (± 0.3 %) Ba (GH) ± 0.19 (± 1.5 %) ± 0.10 (± 0.8 %) Cs (GH) 1.89 ± 0.08 (± 5.0 %) ± (± 0.7 %) Cs (GH) 8.1 ± 0.4 (± 5.0 %) 8.10 ± 0.06 (± 0.7 %) Cs (P) 2.72 ± 0.13 (± 5.0 %) 2.71 ± 0.12 (± 5.0 %) Am (P) 4.73 ± 0.11 (± 2.3 %) 4.35 ± 0.19 (± 5.0 %) Cs (SS) 0.87 ± 0.04 (± 5.0 %) 0.80 ± 0.07 (± 8 %) Am (SS) 1.37 ± 0.04 (± 2.5 %) 1.34 ± 0.11 (± 8 %) Page 85 of 186
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95 Radionuclide Laboratory 32.2 NPL Assigned Value Deviation /% Zeta Z Score 226 Ra (AH) 1.62 ± 0.17 (± 10 %) ± (± 1.3 %) Pu (AH) 16.8 ± 0.5 (± 3 %) ± 0.06 (± 0.4 %) Am (AH) 5.09 ± 0.11 (± 2.2 %) ± (± 0.4 %) Cm (AH) 15.2 ± 0.4 (± 2.2 %) ± 0.06 (± 0.4 %) Th (AL) 1.50 ± 0.04 (± 2.5 %) ± (± 1.0 %) U (AL) 19.4 ± 0.6 (± 3 %) 19.3 ± 0.3 (± 1.4 %) U (AL) 1.01 ± 0.06 (± 5.0 %) ± (± 1.3 %) U (AL) 19.5 ± 0.6 (± 3 %) 19.3 ± 0.3 (± 1.4 %) Pu (AL) 1.30 ± 0.04 (± 4 %) ± (± 0.4 %) Pu (P) 3.97 ± 0.09 (± 2.4 %) 3.97 ± 0.18 (± 5.0 %) Am (P) 4.34 ± 0.11 (± 2.5 %) 4.35 ± 0.19 (± 5.0 %) Pu (SS) 1.44 ± 0.04 (± 3 %) 1.06 ± 0.09 (± 9 %) Am (SS) 1.46 ± 0.03 (± 2.1 %) 1.34 ± 0.11 (± 8 %) Page 87 of 186
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97 Radionuclide Laboratory 32.3 NPL Assigned Value Deviation /% Zeta Z Score 234 U (AL) 20.6 ± 1.2 (± 6 %) 19.3 ± 0.3 (± 1.4 %) U (AL) 0.98 ± 0.05 (± 5.0 %) ± (± 1.3 %) U (AL) 19.8 ± 0.7 (± 4 %) 19.3 ± 0.3 (± 1.4 %) Page 89 of 186
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99 Radionuclide Laboratory 32.4 NPL Assigned Value Deviation /% Zeta Z Score 3 H (B1) ± (± 2.0 %) ± (± 0.7 %) C (B1) 0.96 ± 0.04 (± 4 %) ± (± 0.50 %) Tc (B1) ± (± 8 %) ± (± 0.9 %) H (B2) ± (± 2.3 %) ± (± 0.7 %) Ni (B2) 1.74 ± 0.16 (± 9 %) ± (± 1.0 %) Sr (B2) ± (± 6 %) ± (± 0.21 %) Pu (B2) 0.96 ± 0.12 (± 12 %) ± (± 1.1 %) Sr (P) 2.39 ± 0.13 (± 6 %) 2.51 ± 0.11 (± 5.0 %) Sr (SS) ± (± 6 %) ± (± 8 %) Page 91 of 186
100 Radionuclide Laboratory 32.5 NPL Assigned Value Deviation /% Zeta Z Score 3 H (B1) 0.96 ± 0.06 (± 7 %) ± (± 0.7 %) H (B2) 1.02 ± 0.07 (± 6 %) ± (± 0.7 %) Sr (B2) ± (± 6 %) ± (± 0.21 %) Pu (B2) 0.89 ± 0.07 (± 7 %) ± (± 1.1 %) Sr (P) 2.37 ± 0.13 (± 6 %) 2.51 ± 0.11 (± 5.0 %) Sr (SS) ± (± 6 %) ± (± 8 %) Page 92 of 186
101 Radionuclide Laboratory 32.6 NPL Assigned Value Deviation /% Zeta Z Score 232 Th (AL) 1.60 ± 0.12 (± 8 %) ± (± 1.0 %) U (AL) 19.7 ± 1.1 (± 6 %) 19.3 ± 0.3 (± 1.4 %) Page 93 of 186
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103 Radionuclide Laboratory 34 NPL Assigned Value Deviation /% Zeta Z Score 60 Co (GL) 13.4 ± 0.9 (± 7 %) ± 0.11 (± 0.8 %) Cs (GL) 3.8 ± 0.3 (± 7 %) 3.42 ± 0.03 (± 0.8 %) Cs (GL) 1.98 ± 0.14 (± 7 %) ± (± 0.9 %) Eu (GL) 20.5 ± 2.1 (± 10 %) 21.9 ± 0.4 (± 1.8 %) H (B1) 1.08 ± 0.05 (± 5.0 %) ± (± 0.7 %) C (B1) 0.93 ± 0.06 (± 7 %) ± (± 0.50 %) H (B2) 1.00 ± 0.05 (± 5.0 %) ± (± 0.7 %) Ni (B2) 1.69 ± 0.06 (± 4 %) ± (± 1.0 %) Sr (B2) 0.53 ± 0.05 (± 9 %) ± (± 0.21 %) Pu (B2) 0.93 ± 0.06 (± 7 %) ± (± 1.1 %) Page 95 of 186
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105 Radionuclide Laboratory 35.1 NPL Assigned Value Deviation /% Zeta Z Score 226 Ra (AH) 1.75 ± 0.06 (± 3 %) ± (± 1.3 %) Np (AH) 15.9 ± 0.6 (± 4 %) ± 0.16 (± 1.0 %) Pu (AH) 16.4 ± 0.4 (± 2.3 %) ± 0.06 (± 0.4 %) Am (AH) 5.19 ± 0.17 (± 4 %) ± (± 0.4 %) Cm (AH) 23.4 ± 2.2 (± 9 %) ± 0.06 (± 0.4 %) Th (AL) 1.70 ± 0.19 (± 11 %) ± (± 1.0 %) U (AL) 18.4 ± 0.6 (± 4 %) 19.3 ± 0.3 (± 1.4 %) U (AL) 0.83 ± 0.10 (± 12 %) ± (± 1.3 %) U (AL) 18.5 ± 0.7 (± 4 %) 19.3 ± 0.3 (± 1.4 %) Pu (AL) 1.47 ± 0.14 (± 10 %) ± (± 0.4 %) Co (GH) 11.0 ± 0.5 (± 4 %) ± 0.03 (± 0.3 %) Ba (GH) 13.1 ± 0.5 (± 4 %) ± 0.10 (± 0.8 %) Cs (GH) 1.80 ± 0.07 (± 4 %) ± (± 0.7 %) Cs (GH) 8.1 ± 0.3 (± 4 %) 8.10 ± 0.06 (± 0.7 %) Co (GL) 13.3 ± 0.6 (± 5.0 %) ± 0.11 (± 0.8 %) Cs (GL) 3.25 ± 0.15 (± 5.0 %) 3.42 ± 0.03 (± 0.8 %) Cs (GL) 1.85 ± 0.12 (± 7 %) ± (± 0.9 %) Eu (GL) 22.9 ± 0.9 (± 4 %) 21.9 ± 0.4 (± 1.8 %) H (B1) 1.15 ± 0.16 (± 14 %) ± (± 0.7 %) C (B1) 1.2 ± 0.3 (± 21 %) ± (± 0.50 %) H (B2) 1.26 ± 0.18 (± 14 %) ± (± 0.7 %) Sr (B2) 0.44 ± 0.05 (± 10 %) ± (± 0.21 %) Pu (B2) 0.95 ± 0.06 (± 6 %) ± (± 1.1 %) Sr (P) 6.2 ± 0.6 (± 10 %) 2.51 ± 0.11 (± 5.0 %) Cs (P) 2.67 ± 0.11 (± 4 %) 2.71 ± 0.12 (± 5.0 %) Pu (P) 3.99 ± 0.19 (± 5.0 %) 3.97 ± 0.18 (± 5.0 %) Am (P) 4.21 ± 0.22 (± 5.0 %) 4.35 ± 0.19 (± 5.0 %) Sr (SS) 0.91 ± 0.09 (± 10 %) ± (± 8 %) Cs (SS) 0.84 ± 0.04 (± 4 %) 0.80 ± 0.07 (± 8 %) Pu (SS) 1.57 ± 0.04 (± 3 %) 1.06 ± 0.09 (± 9 %) Am (SS) 1.70 ± 0.09 (± 5.0 %) 1.34 ± 0.11 (± 8 %) Page 97 of 186
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107 Radionuclide Laboratory 35.2 NPL Assigned Value Deviation /% Zeta Z Score 226 Ra (AH) 1.75 ± 0.15 (± 9 %) ± (± 1.3 %) Am (AH) 4.97 ± 0.22 (± 5.0 %) ± (± 0.4 %) U (AL) 20.6 ± 2.2 (± 11 %) 19.3 ± 0.3 (± 1.4 %) H (B1) 1.10 ± 0.23 (± 21 %) ± (± 0.7 %) H (B2) 1.03 ± 0.22 (± 21 %) ± (± 0.7 %) Am (P) 4.33 ± 0.18 (± 4 %) 4.35 ± 0.19 (± 5.0 %) Am (SS) 1.38 ± 0.06 (± 4 %) 1.34 ± 0.11 (± 8 %) Page 99 of 186
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109 Radionuclide Laboratory 38 NPL Assigned Value Deviation /% Zeta Z Score 226 Ra (AH) 1.61 ± 0.06 (± 4 %) ± (± 1.3 %) Pu (AH) 16.0 ± 1.0 (± 6 %) ± 0.06 (± 0.4 %) Am (AH) 5.1 ± 0.6 (± 12 %) ± (± 0.4 %) Cm (AH) 15.0 ± 2.0 (± 13 %) ± 0.06 (± 0.4 %) Co (GH) 11.2 ± 0.6 (± 6 %) ± 0.03 (± 0.3 %) Ba (GH) 11.7 ± 0.8 (± 7 %) ± 0.10 (± 0.8 %) Cs (GH) 2.00 ± 0.10 (± 5.0 %) ± (± 0.7 %) Cs (GH) 8.2 ± 0.5 (± 6 %) 8.10 ± 0.06 (± 0.7 %) H (B1) 0.90 ± 0.10 (± 11 %) ± (± 0.7 %) C (B1) 0.93 ± 0.09 (± 10 %) ± (± 0.50 %) Tc (B1) ± (± 8 %) ± (± 0.9 %) H (B2) 1.10 ± 0.10 (± 9 %) ± (± 0.7 %) Ni (B2) 1.50 ± 0.10 (± 7 %) ± (± 1.0 %) Sr (B2) 0.42 ± 0.04 (± 10 %) ± (± 0.21 %) Pu (B2) 0.90 ± 0.07 (± 8 %) ± (± 1.1 %) Page 101 of 186
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111 Radionuclide Laboratory 40 NPL Assigned Value Deviation /% Zeta Z Score 232 Th (AL) 1.69 ± 0.05 (± 3 %) ± (± 1.0 %) U (AL) ± 0.03 (± 0.18 %) 19.3 ± 0.3 (± 1.4 %) U (AL) 0.71 ± 0.05 (± 7 %) ± (± 1.3 %) U (AL) ± 0.03 (± 0.18 %) 19.3 ± 0.3 (± 1.4 %) Pu (AL) 1.11 ± 0.05 (± 4 %) ± (± 0.4 %) Co (GL) 11.8 ± 0.4 (± 3 %) ± 0.11 (± 0.8 %) Cs (GL) 2.44 ± 0.10 (± 4 %) 3.42 ± 0.03 (± 0.8 %) Cs (GL) 1.57 ± 0.10 (± 7 %) ± (± 0.9 %) Eu (GL) 16.4 ± 0.4 (± 2.1 %) 21.9 ± 0.4 (± 1.8 %) H (B2) 1.2 ± 0.3 (± 22 %) ± (± 0.7 %) Sr (B2) 0.35 ± 0.07 (± 19 %) ± (± 0.21 %) Pu (B2) (no uncertainty reported) ± (± 1.1 %) Sr (SS) 0.23 ± 0.03 (± 13 %) ± (± 8 %) Cs (SS) 0.83 ± 0.04 (± 5.0 %) 0.80 ± 0.07 (± 8 %) Pu (SS) 1.02 ± 0.08 (± 8 %) 1.06 ± 0.09 (± 9 %) Am (SS) 1.07 ± 0.07 (± 6 %) 1.34 ± 0.11 (± 8 %) Page 103 of 186
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113 Radionuclide Laboratory 41 NPL Assigned Value Deviation /% Zeta Z Score 238 Pu (AH) 16.2 ± 0.7 (± 5.0 %) ± 0.06 (± 0.4 %) Am (AH) 5.2 ± 0.4 (± 6 %) ± (± 0.4 %) Cm (AH) 23.0 ± 1.3 (± 6 %) ± 0.06 (± 0.4 %) Co (GH) 9.18 ± 0.08 (± 0.8 %) ± 0.03 (± 0.3 %) Ba (GH) ± 0.09 (± 0.9 %) ± 0.10 (± 0.8 %) Cs (GH) ± (± 0.8 %) ± (± 0.7 %) Cs (GH) 7.07 ± 0.10 (± 1.4 %) 8.10 ± 0.06 (± 0.7 %) H (B2) 1.09 ± 0.07 (± 6 %) ± (± 0.7 %) Sr (B2) ± (± 5.0 %) ± (± 0.21 %) Pu (B2) 1.02 ± 0.11 (± 10 %) ± (± 1.1 %) Page 105 of 186
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115 Radionuclide Laboratory 42 NPL Assigned Value Deviation /% Zeta Z Score 60 Co (GL) 14.1 ± 1.4 (± 10 %) ± 0.11 (± 0.8 %) Cs (GL) 3.1 ± 0.4 (± 11 %) 3.42 ± 0.03 (± 0.8 %) Cs (GL) 1.83 ± 0.19 (± 10 %) ± (± 0.9 %) Eu (GL) 21.1 ± 2.2 (± 10 %) 21.9 ± 0.4 (± 1.8 %) Page 107 of 186
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117 Radionuclide Laboratory 47 NPL Assigned Value Deviation /% Zeta Z Score 226 Ra (AH) 1.53 ± 0.14 (± 9 %) ± (± 1.3 %) Np (AH) 17 ± 3 (± 17 %) ± 0.16 (± 1.0 %) Pu (AH) 16.7 ± 0.7 (± 4 %) ± 0.06 (± 0.4 %) Am (AH) 5.04 ± 0.25 (± 5.0 %) ± (± 0.4 %) Cm (AH) 13.5 ± 0.6 (± 5.0 %) ± 0.06 (± 0.4 %) Th (AL) 1.47 ± 0.14 (± 10 %) ± (± 1.0 %) U (AL) 19.4 ± 0.6 (± 3 %) 19.3 ± 0.3 (± 1.4 %) U (AL) 0.87 ± 0.06 (± 7 %) ± (± 1.3 %) U (AL) 19.5 ± 0.6 (± 3 %) 19.3 ± 0.3 (± 1.4 %) Pu (AL) 1.30 ± 0.08 (± 6 %) ± (± 0.4 %) Co (GH) 10.8 ± 0.7 (± 6 %) ± 0.03 (± 0.3 %) Ba (GH) 12.8 ± 0.8 (± 6 %) ± 0.10 (± 0.8 %) Cs (GH) ± 0.11 (± 0.6 %) ± (± 0.7 %) Cs (GH) 8.1 ± 0.5 (± 6 %) 8.10 ± 0.06 (± 0.7 %) Tc (B1) ± (± 16 %) ± (± 0.9 %) Pu (B2) 0.97 ± 0.14 (± 14 %) ± (± 1.1 %) Cs (SS) 0.91 ± 0.06 (± 7 %) 0.80 ± 0.07 (± 8 %) Pu (SS) 1.34 ± 0.08 (± 6 %) 1.06 ± 0.09 (± 9 %) Am (SS) 1.50 ± 0.10 (± 7 %) 1.34 ± 0.11 (± 8 %) Page 109 of 186
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119 Radionuclide Laboratory 48 NPL Assigned Value Deviation /% Zeta Z Score 3 H (B1) 1.00 ± 0.03 (± 3 %) ± (± 0.7 %) C (B1) 0.90 ± 0.03 (± 4 %) ± (± 0.50 %) Tc (B1) ± (± 6 %) ± (± 0.9 %) Page 111 of 186
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121 Radionuclide Laboratory 55.1 NPL Assigned Value Deviation /% Zeta Z Score 226 Ra (AH) 1.9 ± 2.3 (± 120 %) ± (± 1.3 %) Np (AH) 16 ± 3 (± 19 %) ± 0.16 (± 1.0 %) Pu (AH) 16.9 ± 0.5 (± 3 %) ± 0.06 (± 0.4 %) Am (AH) 4.9 ± 0.4 (± 8 %) ± (± 0.4 %) Cm (AH) 14.6 ± 0.9 (± 6 %) ± 0.06 (± 0.4 %) Co (GH) 11.2 ± 0.4 (± 4 %) ± 0.03 (± 0.3 %) Ba (GH) 13.0 ± 0.4 (± 3 %) ± 0.10 (± 0.8 %) Cs (GH) 1.90 ± 0.14 (± 7 %) ± (± 0.7 %) Cs (GH) 8.14 ± 0.23 (± 3 %) 8.10 ± 0.06 (± 0.7 %) H (B1) 0.95 ± 0.09 (± 9 %) ± (± 0.7 %) C (B1) 1.08 ± 0.04 (± 3 %) ± (± 0.50 %) Tc (B1) ± (± 12 %) ± (± 0.9 %) H (B2) 0.95 ± 0.08 (± 9 %) ± (± 0.7 %) Ni (B2) 1.64 ± 0.10 (± 6 %) ± (± 1.0 %) Sr (B2) ± (± 4 %) ± (± 0.21 %) Pu (B2) 0.93 ± 0.08 (± 8 %) ± (± 1.1 %) Page 113 of 186
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123 Radionuclide Laboratory 55.2 NPL Assigned Value Deviation /% Zeta Z Score 99 Tc (B1) ± (± 3 %) ± (± 0.9 %) Page 115 of 186
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125 Radionuclide Laboratory 57 NPL Assigned Value Deviation /% Zeta Z Score 60 Co (GH) 11.1 ± 0.4 (± 4 %) ± 0.03 (± 0.3 %) Ba (GH) 10.2 ± 0.4 (± 3 %) ± 0.10 (± 0.8 %) Cs (GH) 1.77 ± 0.11 (± 6 %) ± (± 0.7 %) Cs (GH) 8.00 ± 0.25 (± 3 %) 8.10 ± 0.06 (± 0.7 %) Co (GL) 12.1 ± 0.4 (± 3 %) ± 0.11 (± 0.8 %) Cs (GL) 2.94 ± 0.24 (± 8 %) 3.42 ± 0.03 (± 0.8 %) Cs (GL) 1.64 ± 0.09 (± 5.0 %) ± (± 0.9 %) Eu (GL) 19.6 ± 1.4 (± 7 %) 21.9 ± 0.4 (± 1.8 %) H (B1) 0.90 ± 0.04 (± 4 %) ± (± 0.7 %) H (B2) 1.04 ± 0.04 (± 4 %) ± (± 0.7 %) Ni (B2) 0.95 ± 0.05 (± 5.0 %) ± (± 1.0 %) Sr (B2) 0.48 ± 0.04 (± 7 %) ± (± 0.21 %) Pu (B2) 0.90 ± 0.08 (± 9 %) ± (± 1.1 %) Page 117 of 186
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127 Radionuclide Laboratory 61 NPL Assigned Value Deviation /% Zeta Z Score 232 Th (AL) 1.52 ± 0.15 (± 10 %) ± (± 1.0 %) U (AL) 19.6 ± 2.0 (± 10 %) 19.3 ± 0.3 (± 1.4 %) U (AL) 1.09 ± 0.12 (± 11 %) ± (± 1.3 %) U (AL) 20.1 ± 2.1 (± 10 %) 19.3 ± 0.3 (± 1.4 %) Pu (AL) 1.32 ± 0.13 (± 10 %) ± (± 0.4 %) Co (GL) ± 0.20 (± 1.5 %) ± 0.11 (± 0.8 %) Cs (GL) 3.09 ± 0.08 (± 3 %) 3.42 ± 0.03 (± 0.8 %) Cs (GL) 2.02 ± 0.10 (± 5.0 %) ± (± 0.9 %) Eu (GL) 21.2 ± 0.3 (± 1.3 %) 21.9 ± 0.4 (± 1.8 %) Sr (B2) ± (± 5.0 %) ± (± 0.21 %) Page 119 of 186
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129 Radionuclide Laboratory 65 NPL Assigned Value Deviation /% Zeta Z Score 232 Th (AL) 1.66 ± 0.08 (± 5.0 %) ± (± 1.0 %) U (AL) 18.2 ± 1.1 (± 6 %) 19.3 ± 0.3 (± 1.4 %) U (AL) 1.09 ± 0.16 (± 15 %) ± (± 1.3 %) U (AL) 17.8 ± 1.1 (± 6 %) 19.3 ± 0.3 (± 1.4 %) Pu (AL) 1.29 ± 0.10 (± 8 %) ± (± 0.4 %) Co (GL) 13.3 ± 0.5 (± 4 %) ± 0.11 (± 0.8 %) Cs (GL) 31.7 ± 2.4 (± 8 %) 3.42 ± 0.03 (± 0.8 %) Cs (GL) 18.6 ± 0.9 (± 5.0 %) ± (± 0.9 %) Eu (GL) 21.9 ± 1.3 (± 6 %) 21.9 ± 0.4 (± 1.8 %) H (B1) 1.00 ± 0.05 (± 5.0 %) ± (± 0.7 %) C (B1) 1.09 ± 0.06 (± 5.0 %) ± (± 0.50 %) Tc (B1) ± (± 7 %) ± (± 0.9 %) H (B2) 1.11 ± 0.06 (± 5.0 %) ± (± 0.7 %) Cs (SS) 0.85 ± 0.05 (± 6 %) 0.80 ± 0.07 (± 8 %) Am (SS) 1.26 ± 0.08 (± 7 %) 1.34 ± 0.11 (± 8 %) Page 121 of 186
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131 Radionuclide Laboratory 67 NPL Assigned Value Deviation /% Zeta Z Score 60 Co (GH) 11.1 ± 0.4 (± 4 %) ± 0.03 (± 0.3 %) Ba (GH) ± 0.08 (± 0.6 %) ± 0.10 (± 0.8 %) Cs (GH) 1.9 ± 0.3 (± 16 %) ± (± 0.7 %) Cs (GH) 8.3 ± 0.8 (± 9 %) 8.10 ± 0.06 (± 0.7 %) Page 123 of 186
132 Radionuclide Laboratory 69 NPL Assigned Value Deviation /% Zeta Z Score 226 Ra (AH) 1.80 ± 0.12 (± 7 %) ± (± 1.3 %) Page 124 of 186
133 Radionuclide Laboratory 72 NPL Assigned Value Deviation /% Zeta Z Score 60 Co (GL) 12.8 ± 0.7 (± 5.0 %) ± 0.11 (± 0.8 %) Cs (GL) 3.49 ± 0.19 (± 6 %) 3.42 ± 0.03 (± 0.8 %) Cs (GL) 1.86 ± 0.11 (± 6 %) ± (± 0.9 %) Eu (GL) 21.3 ± 1.1 (± 5.0 %) 21.9 ± 0.4 (± 1.8 %) H (B1) 1.06 ± 0.08 (± 8 %) ± (± 0.7 %) Page 125 of 186
Annex 1 to letter 0426(DPRM.REM)1035 of 16 April I. Articles 28 and 29 of the UPU Convention. Article 28 Terminal dues. General provisions
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