BIPM.RI(II)-K1.Cs-134 and APMP.RI(II)-K2.Cs-134
MEASURAND : Equivalent activity of 134Cs
Degrees of equivalence Di and expanded uncertainty Ui (k = 2)
-k1.cs-134_g-may13.gif)
Red diamonds: participants in BIPM.RI(II)-K1.Cs-134
Green triangles: participants in APMP.RI(II)-K2.Cs-134
Note: the right-hand axis shows approximate relative values only
BIPM.RI(II)-K1.Cs-134 and APMP.RI(II)-K2.Cs-134
MEASURAND : Equivalent activity of 134Cs
Degrees of equivalence Di and expanded uncertainty Ui (k = 2) expressed in kBq
-k1.cs-134_does-may13.gif)
*participants in APMP.RI(II)-K2.Cs-134
Results are presented under A4 printable format in Summary Results (PDF file).
| 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 APMP.RI(II)-K2.Cs-134 results are linked to those of BIPM.RI(II)-K1.Cs-134 SIR equivalent activity of the radionuclide 134Cs |
| 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 |
| 1996 | |
| 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 |
| 1987 | |
| 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 |
| 1978 | |
| 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 |
| 1998 | |
| 2005 |
| LNMRI/IRD |
Laboratorio Nacional de Metrologia das Radiacoes Ionizantes, IRD, Brazil, SIM |
| 1987 | |
| 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 |
| 1976 | |
| 2008 |
| NRC |
National Research Council, Canada, SIM |
| 2014 |
| OMH |
Országos Mérésügyi Hivatal; Subsequently MKEH, now BKFH, Hungary, EURAMET |
| 1992 | |
| 2004 |
| P3KRBiN |
Pusat Penelitian & Pengembangan Keselamatan Radiasi & Biomedika Nuklir, Indonesia, APMP |
| 1984 |
| POLATOM |
Radioisotope Centre Polatom, Poland, EURAMET |
| 2013 |
| PTB |
Physikalisch-Technische Bundesanstalt, Germany, EURAMET |
| 1994 | |
| 2004 | |
| 2016 |
This page proposes print-out on A4 paper (portrait) of the comparison details (best printed out using a black and white printer).
Please, select items to be printed out, then click on "OK" :
BIPM.RI(II)-K1.Cs-134 and APMP.RI(II)-K2.Cs-134
MEASURAND : Equivalent activity of 134Cs
| Key comparison reference value: The SIR reference value for this radionuclide is xR = 10 116 kBq, with a standard uncertainty uR = 13 kBq, see section 4.1 of the Final Report dated 2013. |
| The degree of equivalence of laboratory i 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. With n the number of laboratories,  when each laboratory has contributed to the computation of xR, see Metrologia, 42, 140-144. |
| When required, the degree of equivalence between two laboratories is given by a pair of terms: Dij = Di - Dj = (xi - xj) and Uij, its expanded uncertainty (k = 2), both expressed in kBq. The approximation Uij ~ 2(ui2 + uj2)1/2 may be used for the computation of the pair-wise degrees of equivalence. |
|
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 BIPM as the linking laboratory (see the Final Report dated September 2007). |
| 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. |
| When required, the degree of equivalence between two laboratories i and j, participants in one or another of the two key comparisons, is given by a pair of terms both expressed in kBq: Dij = Di - Dj and Uij, its expanded uncertainty (k = 2). Correlations between pairs of laboratories are taken into account as explained in Section 4.2.2 on page 14 of the Final Report dated September 2007. |
BIPM.RI(II)-K1.Cs-134 and APMP.RI(II)-K2.Cs-134
MEASURAND : Equivalent activity of 134Cs
xi : result of measurement carried out in the SIR for the sample submitted by laboratory i
10124 20 2005-04-13 10104 19 2005-04-20 10143 48 2005-07-20 10190 48 2005-09-12 10222 56 2006-11-21 10090 70 2008-11-24 10031 52 2009-02-25 10101 29 2010-08-05
ui : combined standard uncertainty of xi
Lab i
xi
/ kBq
ui
/ kBq
Date of measurement
KRISS
10214
20
1996-02-22
CIEMAT
9936
20
2001-04-27
NIST
10141
31
2002-06-21
IRMM
10047
39
2004-01-20
PTB
10080
23
2004-07-05
MKEH
10131
31
2004-12-08
LNE-LNHB
xi : result of measurement carried out at laboratory i converted to the equivalent activity through the linking NMIs measurements (see Final Report dated September 2007)
ui : combined standard uncertainty of xi
| Lab i | xi / kBq |
ui / kBq |
Year of measurement |
| VNIIM | 10094 | 26 | 2005 |
| INER | 10178 | 18 | 2005 |
