BIPM.RI(I)-K1, COOMET.RI(I)-K1, EUROMET.RI(I)-K1, APMP.RI(I)-K1, APMP.RI(I)-K1.1, EURAMET.RI(I)-K1.2 and EURAMET.RI(I)-K1.1
MEASURAND Air kerma
Radiation quality Co-60 beam
Degrees of equivalence represented by Di = (xI - xR)/xR and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in mGy/Gy.
BIPM.RI(I)-K1, COOMET.RI(I)-K1, EUROMET.RI(I)-K1, APMP.RI(I)-K1, APMP.RI(I)-K1.1, EURAMET.RI(I)-K1.2 and EURAMET.RI(I)-K1.1
MEASURAND Air kerma
Radiation quality Co-60 beam
Degrees of equivalence represented by Di = (xI - xR)/xR and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in mGy/Gy.
| LABi | Di | Uneg,i | Upos,i | |
|---|---|---|---|---|
mGy/Gy |
mGy/Gy |
mGy/Gy |
||
| VNIIM | 0.8 | 3.6 | ||
| KRISS | -0.5 | 3.2 | ||
| NIST | 3.9 | 6.8 | ||
| NMIJ | 1.2 | 4.4 | ||
| ININ | 3.5 | 4.2 | ||
| LNE-LNHB | -0.6 | 3.6 | ||
| PTB | 3.6 | 3.4 | ||
| ENEA-INMRI | -0.1 | 4.4 | ||
| NIM | -0.3 | 5.4 | ||
| IST-LPSR | 2.6 | 3.4 | ||
| MKEH | 4.7 | 3.8 | ||
| SCK·CEN | 2.1 | 5.2 | ||
| SMU | 4.2 | 5.4 | ||
| NPL | -0.4 | 6.0 | ||
| VSL | -3.7 | 4.2 | ||
| BEV | 3.0 | 5.0 | ||
| GUM | 3.9 | 6.0 | ||
| ARPANSA | -1.4 | 5.5 | ||
| NRC | 2.2 | 4.4 | ||
| BELGIM | 12.5 | 21.8 | ||
| CPHR | 1.1 | 9.6 | ||
| RMTC | -3.6 | 9.6 | ||
| CMI | -5.8 | 14.1 | ||
| SSM | 1.0 | 7.5 | ||
| STUK | -2.3 | 7.3 | ||
| NRPA | 5.1 | 7.1 | ||
| IAEA | 0.0 | 7.5 | ||
| HIRCL | 4.2 | 11.9 | ||
| BIM | -4.5 | 13.0 | ||
| LNMRI | 2.4 | 13.7 | ||
| CNEA | 1.8 | 10.0 | ||
| BARC | 0.7 | 7.6 | ||
| Nuclear Malaysia | -0.1 | 7.4 | ||
| NMISA | 0.9 | 6.9 | ||
| INER | 0.5 | 6.9 | ||
| DMSC | -4.5 | 7.8 | ||
| NIS | -12.1 | 14.6 | ||
| VINS | 2.4 | 10.2 | ||
| METAS | 0.1 | 10.5 | ||
| CIEMAT | 0.7 | 7.6 |
| Metrology area, Sub-field | Ionizing Radiation, Section I (x and gamma rays, electrons) |
| Description | Measurement of air kerma for Cobalt 60 |
| Time of measurements | 2005 - 2008 |
| Status | Approved for equivalence |
| Final Reports of the comparisons | |
| References | |
| Measurand | Air kerma rate in mGy/nC |
| Parameters | Radiation type: Co-60 gamma rays |
| Transfer device | Two ionization chambers and electrometers |
| Comparison type | Key Comparison |
| Consultative Committee | CCRI (Consultative Committee for Ionizing Radiation) |
| Conducted by | EURAMET (European Association of National Metrology Institutes) |
| RMO Internal Identifier | EUROMET Project No 813 |
| Comments | Last update of results: 14 November 2018 COOMET.RI(I)-K1, EUROMET.RI(I)-K1, APMP.RI(I)-K1, APMP.RI(I)-K1.1.2010 and EURAMET.RI(I)-K1.2 results are linked to those of BIPM.RI(I)-K1 Air kerma in Cobalt-60
|
| Pilot institute |
IAEA
International Atomic Energy Agency IAEA - International Organization |
| Contact person | I. Csete +43 2600 28328 |
| Pilot laboratory | |
|---|---|
| IAEA |
International Atomic Energy Agency, IAEA - International Organization, EURAMET |
| ARPANSA |
Australian Radiation Protection and Nuclear Safety Agency, Australia, APMP |
| BEV |
Bundesamt für Eich- und Vermessungswesen, Austria, EURAMET |
| BIM |
Bulgarian Institute of Metrology, Bulgaria, EURAMET |
| CIEMAT |
Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas, Spain, EURAMET |
| CMI |
Czech Metrology Institute, Czechia, EURAMET |
| CNEA |
National Commission of Atomic Energy, Argentina, SIM |
| ENEA-INMRI |
Istituto Nazionale di Metrologia delle Radiazioni Ionizzanti, Italy, EURAMET |
| GUM |
Glowny Urzad Miar, Central Office of Measures, Poland, EURAMET |
| HIRCL |
Helenic Ionizing Radiation Calibration Laboratory, Greece, EURAMET |
| IRB |
Rudjer Boskovic Institute; became: Secondary Standard Dosimetry Laboratory of the Ruder Boskovic Institute, HMI/IRB-SSDL, Croatia, EURAMET |
| IST/ITN |
Instituto Tecnológico e Nuclear, Instituto Superior Técnico, Universidade Técnica de Lisboa (became IST-LPSR), Portugal, EURAMET |
| LNE-LNHB |
Commissariat à l'énergie atomique / Laboratoire National Henri Becquerel, France, EURAMET |
| LNMRI |
Laboratorio Nacional de Metrologia das Radiaçoes Ionizantes, IRD, Brazil, SIM |
| METAS |
Federal Institute of Metrology, Switzerland, EURAMET |
| MKEH |
Hungarian Trade Licensing Office; now BFKH, Hungary, EURAMET |
| NIST |
National Institute of Standards and Technology, United States, SIM |
| NRC |
National Research Council, Canada, SIM |
| NRPA |
Norvegian Radiation Protection Authority, Norway, EURAMET |
| PTB |
Physikalisch-Technische Bundesanstalt, Germany, EURAMET |
| RMTC |
Radiation Metrology and Testing Centre, Latvia, EURAMET |
| SMU |
Slovensky Metrologicky Ustav, Slovakia, EURAMET |
| SSM |
Swedish Radiation Safety Authority, Sweden, EURAMET |
| STUK |
Radiation and Nuclear Safety Authority, Finland, EURAMET |
| VNIIM |
D.I. Mendeleyev Institute for Metrology, Rosstandart, Russian Federation, COOMET |
| VSL |
VSL, Netherlands, EURAMET |
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(I)-K1, COOMET.RI(I)-K1, EUROMET.RI(I)-K1, APMP.RI(I)-K1, APMP.RI(I)-K1.1, EURAMET.RI(I)-K1.2 and EURAMET.RI(I)-K1.1
MEASURAND Air kerma
Radiation quality Co-60 beam
The key comparison reference value is the BIPM evaluation of air kerma.
BIPM.RI(I)-K1
The degree of equivalence of each laboratory i with respect to the key comparison reference value is given by a pair of terms both expressed in mGy/Gy:
the relative difference Di and Ui, its expanded uncertainty (k = 2), with Ui = 2ui.
When required, the degree of equivalence between two laboratories i and j can be evaluated by a pair of terms both expressed in mGy/Gy:
Dij = Di - Dj and Uij , its expanded uncertainty (k = 2). The approximation for Uij is explained in section 5 of the Final Report.
Linking COOMET.RI(I)-K1 to BIPM.RI(I)-K1
The relative value xi is the comparison result for laboratory i participant in COOMET.RI(I)-K1 and is linked to the BIPM.RI(I)-K1 via PTB and SMU (see COOMET.RI(I)-K1 Final Report).
The degree of equivalence of each laboratory i participant in COOMET.RI(I)-K1 with respect to the key comparison reference value is given by a pair of terms both expressed in mGy/Gy: Di = (xi - 1) x 1000 and Ui, its expanded uncertainty (k = 2).
See COOMET.RI(I)-K1 Final Report for the approximation used for Ui in the table of degrees of equivalence.
The degree of equivalence between two laboratories i and j is given by a pair of terms both expressed in mGy/Gy:
Dij = Di - Dj and Uij, its expanded uncertainty (k = 2). The approximation for Uij is given in COOMET.RI(I)-K1 Final Report.
Linking EUROMET.RI(I)-K1 to BIPM.RI(I)-K1
The relative value xi is the comparison result for laboratory i participant in EUROMET.RI(I)-K1 and is linked to the BIPM.RI(I)-K1 via the seven linking laboratories ARPANSA, BEV, ENEA-INMRI, LNE-LNHB, MKEH, NRC and VSL (see EUROMET.RI(I)-K1 Final Report).
The degree of equivalence of each laboratory i participant in EUROMET.RI(I)-K1 with respect to the key comparison reference value is given by a pair of terms both expressed in mGy/Gy: Di = (xi - 1) x 1000 and Ui, its expanded uncertainty (k = 2).
See EUROMET.RI(I)-K1 Final Report for the approximation used for Ui in the table of degrees of equivalence.
The degree of equivalence between two laboratories i and j is given by a pair of terms both expressed in mGy/Gy:
Dij = Di - Dj and Uij, its expanded uncertainty (k = 2). The approximation for Uij is given in EUROMET.RI(I)-K1 Final Report.
Linking APMP.RI(I)-K1 to BIPM.RI(I)-K1
The relative value xi is the comparison result for laboratory i participant in APMP.RI(I)-K1 and is linked to the BIPM.RI(I)-K1 via ARPANSA and NMIJ-AIST (see APMP.RI(I)-K1 Final Report).
The degree of equivalence of each laboratory i participant in APMP.RI(I)-K1 with respect to the key comparison reference value is given by a pair of terms both expressed in mGy/Gy: Di = (xi - 1) x 1000 and Ui, its expanded uncertainty (k = 2). (see Section 5 of the APMP.RI(I)-K1 Final Report).
The degree of equivalence between two laboratories i and j is given by a pair of terms both expressed in mGy/Gy:
Dij = Di - Dj and Uij, its expanded uncertainty (k = 2). The approximation for Uij is given in APMP.RI(I)-K1 Final Report.
Linking APMP.RI(I)-K1.1 to BIPM.RI(I)-K1
The relative value xi is the comparison result for laboratory i participant in APMP.RI(I)-K1.1 and is linked to the BIPM.RI(I)-K1 via ARPANSA and NMIJ-AIST (see APMP.RI(I)-K1.1 Final Report).
The degree of equivalence of each laboratory i participant in APMP.RI(I)-K1.1 with respect to the key comparison reference value is given by a pair of terms both expressed in mGy/Gy: Di = (xi - 1) x 1000 and Ui, its expanded uncertainty (k = 2) (see Section 5 of the APMP.RI(I)-K1 Final Report).
The degree of equivalence between two laboratories i and j is given by a pair of terms both expressed in mGy/Gy:
Dij = Di - Dj and Uij, its expanded uncertainty (k = 2). The approximation for Uij is given in APMP.RI(I)-K1.1 Final Report.
Linking EURAMET.RI(I)-K1.2 to BIPM.RI(I)-K1
The relative value xi is the comparison result for laboratory i participant in EURAMET.RI(I)-K1.2 and is linked to the BIPM.RI(I)-K1 via BEV (see EURAMET.RI(I)-K1.2 Final Report).
The degree of equivalence of each laboratory i participant in EURAMET.RI(I)-K1.2 with respect to the key comparison reference value is given by a pair of terms both expressed in mGy/Gy: Di = (xi - 1) x 1000 and Ui, its expanded uncertainty (k = 2).
Linking EURAMET.RI(I)-K1.1 to BIPM.RI(I)-K1
The relative value xi is the comparison result for laboratory i participant in EURAMET.RI(I)-K1.1 and is linked to the BIPM.RI(I)-K1 via BEV, LNE-LNHB and VSL (see EURAMET.RI(I)-K1.1 Final Report).
The degree of equivalence of each laboratory i participant in EURAMET.RI(I)-K1.1 with respect to the key comparison reference value is given by a pair of terms both expressed in mGy/Gy: Di = (xi - 1) x 1000 and Ui, its expanded uncertainty (k = 2).
Following decision of the CCRI in 2011, the pair-wise degrees of equivalence are not explicitely published in the KCDB.
In general, only the most recent degree of equivalence is retained for those laboratories which participated in two key comparisons.
Degrees of equivalence obtained in SIM.RI(I)-K1 are superseeded by more recent results.
BIPM.RI(I)-K1, COOMET.RI(I)-K1, EUROMET.RI(I)-K1, APMP.RI(I)-K1, APMP.RI(I)-K1.1, EURAMET.RI(I)-K1.2 and EURAMET.RI(I)-K1.1
MEASURAND Air kerma
Radiation quality Co-60 beam
BIPM.RI(I)-K1 - Laboratory measurements
xi : air kerma determined by Lab i at the BIPM, relative to the reference value determined by the BIPM standard
ui : combined standard uncertainty of xi
-K1_LIM Dec2021.png)
COOMET.RI(I)-K1 - Laboratory measurements
xi : air kerma determined by Lab i at the BIPM, relative to the reference value determined by the BIPM standard through the PTB and SMU measurements at the BIPM (see COOMET.RI(I)-K1 Final Report)
ui : combined standard uncertainty of xi
-K1_LIM.PNG)
EUROMET.RI(I)-K1 - Laboratory measurements
MEASURAND : Air kerma
xi : air kerma detrmined by Lab i , relative to the reference value determined by the BIPM standard through the ARPANSA, BEV, ENEA-INMRI, LNE-LNHB, MKEH, NRC and VSL measurements at the BIPM.
ui : combined standard uncertainty of xi
-K1_LIM.PNG)
APMP.RI(I)-K1 - Laboratory measurements
xi : air kerma detrmined by Lab i , relative to the reference value determined by the BIPM standard through ARPANSA and NMIJ AIST measurements at the BIPM
ui : combined standard uncertainty of xi
-K1_LIM.PNG)
APMP.RI(I)-K1 measurements were carried out between August 2004 and May 2006
APMP.RI(I)-K1.1 - Laboratory measurements
xi : air kerma detrmined by Lab i , relative to the reference value determined by the BIPM standard through ARPANSA and NMIJ AIST measurements at the BIPM
ui : combined standard uncertainty of xi
-K1.1_LIM.PNG)
EURAMET.RI(I)-K1.2 - Laboratory measurements
xi : air kerma detrmined by Lab i , relative to the reference value determined by the BIPM standard through BEV measurements at the BIPM
ui : combined standard uncertainty of xi
-K1.2_LIM.PNG)
EURAMET.RI(I)-K1.1 - Laboratory measurements
See Section 4 of the EURAMET.RI(I)-K1.1 Final Report.
