BIPM.RI(II)-K1.Cs-134 and APMP.RI(II)-K2.Cs-134
MEASURAND SIR equivalent activity of Cs-134
Degrees of equivalence represented by Di = (xI - xR) and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in kBq.
Results given in absolute values.
BIPM.RI(II)-K1.Cs-134 and APMP.RI(II)-K2.Cs-134
MEASURAND SIR equivalent activity of Cs-134
Degrees of equivalence represented by Di = (xI - xR) and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in kBq/MBq.
Results given in relative values.
BIPM.RI(II)-K1.Cs-134 and APMP.RI(II)-K2.Cs-134
MEASURAND SIR equivalent activity of Cs-134
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 |
||
| BKFH | 8 | 62 | ||
| LNE-LNHB | 1 | 42 | ||
| NMIJ | -19 | 41 | ||
| BARC | 20 | 95 | ||
| CNEA | 67 | 95 | ||
| IFIN-HH | 99 | 111 | ||
| BEV | -33 | 142 | ||
| IRA | -92 | 106 | ||
| NMISA | -22 | 58 | ||
| POLATOM | -16 | 77 | ||
| NRC | 8 | 85 | ||
| LNMRI-IRD | -36 | 77 | ||
| PTB | -42 | 53 | ||
| INER | 55 | 42 | ||
| VNIIM | -29 | 56 |
Results given in absolute values.
BIPM.RI(II)-K1.Cs-134 and APMP.RI(II)-K2.Cs-134
MEASURAND SIR equivalent activity of Cs-134
Degrees of equivalence represented by Di = (xI - 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 |
||
| BKFH | 0.8 | 6.1 | ||
| LNE-LNHB | 0.1 | 4.2 | ||
| NMIJ | -1.9 | 4.0 | ||
| BARC | 2 | 9 | ||
| CNEA | 7 | 9 | ||
| IFIN-HH | 10 | 11 | ||
| BEV | -3 | 14 | ||
| IRA | -9 | 10 | ||
| NMISA | -2.2 | 5.8 | ||
| POLATOM | -1.6 | 7.6 | ||
| NRC | 0.8 | 8.4 | ||
| LNMRI-IRD | -3.6 | 7.6 | ||
| PTB | -4.2 | 5.2 | ||
| INER | 5.4 | 4.1 | ||
| VNIIM | -2.9 | 5.5 |
Results given in relative values.
| Metrology area, Sub-field | Ionizing Radiation, Section II (Measurement of Radionuclides) |
| Description | Activity of radionuclide Cs-134 |
| 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 First results published on 08 July 2003 Most recent update: 13 January 2023 Earlier reports and the status of not yet completed resulsts can be found in the participants list. Results older than 20 years are no longer published in the KCDB (see pages 37 and 38 of the CCRI Report of its 18th meeting in 2003). |
| 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 |
| 1978 | |
| BARC |
Bhabha Atomic Research Centre, India, APMP |
| 2005 |
| BEV |
Bundesamt für Eich- und Vermessungswesen, Austria, EURAMET |
| 2008 |
| CIEMAT |
Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas, Spain, EURAMET |
| 2001 |
| CMI-IIR |
Czech Metrology Institute - Inspectorate for Ionizing Radiation, Czechia, EURAMET |
| 1978 |
| CNEA |
National Commission of Atomic Energy, Argentina, SIM |
| 2005 |
| IFIN-HH |
"Horia Hulubei" National Institute of Research and Development for Physics and Nuclear Engineering, Romania, EURAMET |
| 2006 |
| IRA |
Institut Universitaire de Radiophysique Appliquée, Switzerland, EURAMET |
| 2009 |
| IRMM |
Institute for Reference Materials and Measurements, European Union, EURAMET |
| 2004 |
| KRISS |
Korea Research Institute of Standards and Science, Korea, Republic of, APMP |
| 1996 |
| LNE-LNHB |
Commissariat à l'énergie atomique / Laboratoire National Henri Becquerel, France, EURAMET |
| 2005 |
| LNMRI/IRD |
Laboratorio Nacional de Metrologia das Radiacoes Ionizantes, IRD, Brazil, SIM |
| 2015 |
| NIST |
National Institute of Standards and Technology, United States, SIM |
| 2002 |
| NMIJ AIST |
National Metrology Institute of Japan, Japan, APMP |
| 2005 |
| NMISA |
National Metrology Institute of South Africa, South Africa, AFRIMETS |
| 2010 |
| NPL |
National Physical Laboratory, United Kingdom, EURAMET |
| 2008 |
Abandonned |
| NRC |
National Research Council, Canada, SIM |
| 2014 |
| OMH |
Országos Mérésügyi Hivatal; Subsequently MKEH, now BKFH, Hungary, EURAMET |
| 2004 |
| P3KRBiN |
Pusat Penelitian & Pengembangan Keselamatan Radiasi & Biomedika Nuklir, Indonesia, APMP |
| 1984 |
| POLATOM |
Radioisotope Centre Polatom, Poland, EURAMET |
| 2014 |
| PTB |
Physikalisch-Technische Bundesanstalt, Germany, EURAMET |
| 2016 | |
| 2004 |
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BIPM.RI(II)-K1.Cs-134 and APMP.RI(II)-K2.Cs-134
MEASURAND SIR equivalent activity of Cs-134
The key comparison reference value xR for this radionuclide is estimated to be
xR = 10 123 kBq with a standard uncertainty uR = 10 kBq
The degrees of equivalence represented by Di = (xi - xR) and its expanded uncertainty Ui at a 95 % level of confidence are both expressed in kBq, where xi is the equivalent activity for laboratory i.
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.
Linking APMP.RI(II)-K2.Cs-134 to BIPM.RI(II)-K1.Cs-134
APMP.RI(II)-K2.Cs-134 comparison is linked to the BIPM.RI(II)-K1.Cs-134 comparison through the SIR results of the NMIJ and the LNE-LNHB.
The value xi is the equivalent activity for laboratory i participant in APMP.RI(II)-K2.Cs-134 having been normalized to the value of the LNE-LNHB as the linking laboratory (see section 4 of the Final report dated 2008: Metrologia 2008 45 Tech. Suppl. 06001).
The degree of equivalence of laboratory i participant in APMP.RI(II)-K2.Cs-134 with respect to the key comparison reference value is given by a pair of terms:
Di = (xi - xR) and Ui, its expanded uncertainty (k = 2), both expressed in kBq.
The approximation Ui = 2(ui2 + uR2)1/2 is used in the following table for degrees of equivalence.
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.Cs-134 and APMP.RI(II)-K2.Cs-134
MEASURAND SIR equivalent activity of Cs-134
xi measurement value submitted by laboratory i, Labi
ui combined standard uncertainty of xi
BIPM.RI(II)-K1.Cs-134
| Labi | xi | ui | Date of measurement | |
| kBq | kBq | |||
| BKFH | 10 131 | 31 | 2004-12-08 | |
| LNE-LNHB | 10 124 | 20 | 2005-04-13 | |
| NMIJ | 10 104 | 19 | 2005-04-20 | |
| BARC | 10 143 | 48 | 2005-07-20 | |
| CNEA | 10 190 | 48 | 2005-09-12 | |
| IFIN-HH | 10 222 | 56 | 2006-11-21 | |
| BEV | 10 090 | 70 | 2008-11-24 | |
| IRA | 10 031 | 52 | 2009-02-25 | |
| NMISA | 10 101 | 29 | 2010-08-05 | |
| POLATOM | 10 107 | 39 | 2014-01-09 | |
| NRC | 10 131 | 43 | 2014-03-18 | |
| LNMRI-IRD | 10 087 | 39 | 2015-12-15 | |
| PTB | 10 081 | 26 | 2016-08-17 |
APMP.RI(II)-K2.Cs-134
| Labi | xi | ui | Date of measurement | |
| kBq | kBq | |||
| VNIIM | 10 094 | 26 | 2005 | |
| INER | 10 178 | 18 | 2005 |
