BIPM.RI(II)-K1.Co-60
MEASURAND : Equivalent activity of Co-60
Degrees of equivalence relative to the BIPM.RI(II)-K1.Co-60 key comparison reference value
Degrees of equivalence represented by Di = (xI - xR) and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in kBq.
Results in absolute values
BIPM.RI(II)-K1.Co-60
MEASURAND : Equivalent activity of Co-60
Degrees of equivalence relative to the BIPM.RI(II)-K1.Co-60 key comparison reference value
Degrees of equivalence represented by Di = (xI - xR)/xR and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in kBq/MBq.
Results in relative values
BIPM.RI(II)-K1.Co-60
MEASURAND : Equivalent activity of Co-60
Degrees of equivalence relative to the BIPM.RI(II)-K1.Co-60 key comparison reference value
Degrees of equivalence represented by Di = (xI - xR) and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in kBq.
| LABi | Di | Uneg,i | Upos,i | |
|---|---|---|---|---|
kBq |
kBq |
kBq |
||
| NMIJ | -12 | 16 | ||
| JRC | -23 | 34 | ||
| IFIN-HH | 39 | 48 | ||
| BEV | -5 | 34 | ||
| CNEA | 8 | 52 | ||
| NRC | 3 | 18 | ||
| NIM | -10 | 38 | ||
| TENMAK-NUKEN | -14 | 178 | ||
| VNIIM | 0 | 14 | ||
| PTB | 7 | 36 | ||
| NIST | 0 | 36 | ||
| SMU | -15 | 54 | ||
| BARC | -13 | 42 | ||
| POLATOM | 14 | 52 | ||
| LNE-LNHB | 8 | 24 | ||
| ENEA-INMRI | 34 | 60 | ||
| NPL | -4 | 20 | ||
| LNMRI-IRD | -4 | 46 | ||
| NMISA | 6 | 42 | ||
| ANSTO | 0 | 18 |
Results in absolute values
Degrees of equivalence represented by Di = (xI - xR) /xR and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in kBq/MBq
| LABi | Di | Uneg,i | Upos,i | |
|---|---|---|---|---|
kBq/MBq |
kBq/MBq |
kBq/MBq |
||
| NMIJ | -1.7 | 2.2 | ||
| JRC | -3.3 | 4.8 | ||
| IFIN-HH | 5.5 | 6.8 | ||
| BEV | -0.7 | 4.9 | ||
| CNEA | 1.1 | 7.3 | ||
| NRC | 0.4 | 2.5 | ||
| NIM | -1.4 | 5.3 | ||
| TENMAK-NUKEN | -2 | 25 | ||
| VNIIM | -0.0 | 1.9 | ||
| PTB | 1.0 | 5.1 | ||
| NIST | -0.0 | 5.1 | ||
| SMU | -2.1 | 7.6 | ||
| BARC | -1.8 | 5.9 | ||
| POLATOM | 2.0 | 7.3 | ||
| LNE-LNHB | 1.1 | 3.3 | ||
| ENEA-INMRI | 4.8 | 8.5 | ||
| NPL | -0.6 | 2.8 | ||
| LNMRI-IRD | -0.6 | 6.5 | ||
| NMISA | 0.8 | 5.9 | ||
| ANSTO | -0.0 | 2.5 |
Results in relative values
| Metrology area, Sub-field | Ionizing Radiation, Section II (Measurement of Radionuclides) |
| Description | Activity of radionuclide Co-60 |
| Time of measurements | 1975 - |
| Status | Continuous, approved for equivalence |
| Final Reports of the comparisons | |
| Measurand | SIR equivalent activity |
| Transfer device | Radioactive solution |
| Comparison type | Key Comparison |
| Consultative Committee | CCRI (Consultative Committee for Ionizing Radiation) |
| Conducted by | BIPM (Bureau International des Poids et Mesures) |
| Comments | SIR: Système International de Référence, International Reference System Most recent results published on 29 September 2021, revised on 20 March 2023. The status for not yet completed comparisons is indicated in "Participants". |
| Pilot institute |
BIPM
Bureau International des Poids et Mesures BIPM - International Organization |
| Contact person | Carine Michotte +33 (0) 1 45 07 70 85 |
| Pilot laboratory | |
|---|---|
| BIPM |
Bureau International des Poids et Mesures, BIPM - International Organization, N/A |
| 1976 | |
| ANSTO |
Australian Nuclear Science and Technology Organisation, Australia, APMP |
| 2022 |
|
| BARC |
Bhabha Atomic Research Centre, India, APMP |
| 2021 |
|
| 2012 | |
| 2001 |
| BEV |
Bundesamt für Eich- und Vermessungswesen, Austria, EURAMET |
| 2007 |
| BFKH |
Government Office of the Capital City Budapest, Hungary, EURAMET |
| 1999 |
comparison carried out with OMH (Országos Mérésügyi Hivatal) |
| CIEMAT |
Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas, Spain, EURAMET |
| 1999 |
| CMI |
Czech Metrology Institute, Czechia, EURAMET |
| 1978 |
comparison carried out with CMI-IIR (Czech Metrology Institute - Inspectorate for Ionizing Radiation) |
| CNEA |
National Commission of Atomic Energy, Argentina, SIM |
| 2003 | |
| 2011 |
| ENEA-INMRI |
Istituto Nazionale di Metrologia delle Radiazioni Ionizzanti, Italy, EURAMET |
| 2021 |
|
| IFIN-HH |
"Horia Hulubei" National Institute of Research and Development for Physics and Nuclear Engineering, Romania, EURAMET |
| 2007 |
| IRA |
Institut Universitaire de Radiophysique Appliquée, Switzerland, EURAMET |
| 2000 |
| JRC |
Joint Research Centre, European Union, EURAMET |
| 2005 |
comparison carried out with IRMM (Institute for Reference Materials and Measurements) |
| KRISS |
Korea Research Institute of Standards and Science, Korea, Republic of, APMP |
| 1995 |
| LNE-LNHB |
Commissariat à l'énergie atomique / Laboratoire National Henri Becquerel, France, EURAMET |
| 1999 | |
| 2021 |
|
| LNMRI/IRD |
Laboratorio Nacional de Metrologia das Radiacoes Ionizantes, IRD, Brazil, SIM |
| 2021 |
|
| NIM |
National Institute of Metrology, China, APMP |
| 2021 |
|
| 2014 |
| NIST |
National Institute of Standards and Technology, United States, SIM |
| 2021 |
|
| 2007 |
| NMIJ AIST |
National Metrology Institute of Japan, Japan, APMP |
| 2004 |
| NMISA |
National Metrology Institute of South Africa, South Africa, AFRIMETS |
| 2021 |
|
| 2002 |
comparison carried out with CSIR-NML (Council for Scientific and Industrial Research, National Metrology Laboratory) |
| NPL |
National Physical Laboratory, United Kingdom, EURAMET |
| 2021 |
|
| 2000 |
| NRC |
National Research Council, Canada, SIM |
| 2021 |
Report in progress, Draft A |
| 2012 |
| POLATOM |
Radioisotope Centre Polatom, Poland, EURAMET |
| 2021 |
|
| 2003 |
| PTB |
Physikalisch-Technische Bundesanstalt, Germany, EURAMET |
| 2020 |
|
| 2001 | |
| 2017 |
| PTKMR-BATAN |
Center for Technology of Radiation Safety and Metrology, National Nuclear Energy Agency, Indonesia, APMP |
| 1984 |
comparison carried out with P3KRBiN (Pusat Penelitian & Pengembangan Keselamatan Radiasi & Biomedika Nuklir) |
| SMU |
Slovensky Metrologicky Ustav, Slovakia, EURAMET |
| 2020 |
|
| TENMAK-NUKEN |
Nuclear Energy Research Institute, Türkiye, EURAMET |
| 2018 |
| VNIIM |
D.I. Mendeleyev Institute for Metrology, Rosstandart, Russian Federation, COOMET |
| 2019 |
|
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BIPM.RI(II)-K1.Co-60
MEASURAND : Equivalent activity of Co-60
Key comparison reference value: the SIR key comparison reference value xR for this radionuclide is xR = 7 062 kBq with a standard uncertainty uR = 2.3 kBq
(see Section 4.1 of the BIPM.RI(II)-K1.Co-60 Final Report). The value xi is taken as the equivalent activity for a laboratory i.
The degree of equivalence of each laboratory i with respect to the reference value is given by a pair of terms:
Di = (xi - xR) and Ui its expanded uncertainty (k = 2), both expressed in kBq, and
Ui = 2((1 - 2wi)ui2 + u2R)1/2, where wi is the weight of laboratory i contributing to the calculation of xR.
The degrees of equivalence are also given in relative terms by Di = (xI - xR) /xR and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in kBq/MBq.
BIPM.RI(II)-K1.Co-60
MEASURAND : Equivalent activity of Co-60
xi result of measurement carried out in the SIR for the sample submitted by laboratory i, Labi
ui combined standard uncertainty of xi
| Labi | xi | ui | Date of measurement | |
| kBq | kBq | |||
| NMIJ | 7050 | 8 | 2004-03-17 | |
| JRC | 7039 | 17 | 2005-01-27 | |
| IFIN-HH | 7101 | 24 | 2007-05-10 | |
| BEV | 7057 | 17 | 2007-09-27 | |
| CNEA | 7070 | 26 | 2011-10-24 | |
| NRC | 7065 | 9 | 2012-08-29 | |
| NIM | 7052 | 19 | 2014-07-01 | |
| TENMAK-NUKEN | 7048 | 89 | 2018-01-08 | |
| VNIIM | 7062 | 7 | 2019-06-28 | |
| PTB | 7069 | 18 | 2020-07-30 | |
| NIST | 7062 | 18 | 2020-11-09 | |
| SMU | 7047 | 27 | 2020-11-09 | |
| BARC | 7049 | 21 | 2021-01-07 | |
| POLATOM | 7076 | 26 | 2021-03-03 | |
| LNE-LNHB | 7070 | 12 | 2021-03-04 | |
| ENEA-INMRI | 7096 | 30 | 2021-04-15 | |
| NPL | 7058 | 10 | 2021-05-03 | |
| LNMRI-IRD | 7058 | 23 | 2021-09-01 | |
| NMISA | 7068 | 21 | 2022-04-08 | |
| ANSTO | 7062 | 9 | 2022-08-18 | |
