BIPM.RI(I)-K4, SIM.RI(I)-K4, EUROMET.RI(I)-K4, EURAMET.RI(I)-K4.2, EURAMET.RI(I)-K4.1 and APMP.RI(I)-K4
MEASURAND Absorbed dose to water
Radiation quality Co-60 beam
Degrees of equivalence, Di and expanded uncertainty Ui (k = 2)
BIPM.RI(I)-K4, SIM.RI(I)-K4, EUROMET.RI(I)-K4, EURAMET.RI(I)-K4.2, EURAMET.RI(I)-K4.1 and APMP.RI(I)-K4
MEASURAND Absorbed dose to water
Radiation quality Co-60 beam
Degrees of equivalence, Di and expanded uncertainty Ui (k = 2)
| LABi | Di | Uneg,i | Upos,i | |
|---|---|---|---|---|
mGy/Gy |
mGy/Gy |
mGy/Gy |
||
| MKEH | -0.7 | 9.6 | ||
| ENEA | -0.1 | 8.8 | ||
| VNIIFTRI | -1.4 | 8.6 | ||
| NMIJ | -3.0 | 9.2 | ||
| LNE-LNHB | -1.9 | 7.8 | ||
| METAS | 1.1 | 10 | ||
| PTB | -1.3 | 7.6 | ||
| NPL | 2.3 | 14 | ||
| VSL | -3.0 | 9.6 | ||
| BEV | -0.3 | 8.2 | ||
| GUM | 3.0 | 7.0 | ||
| ARPANSA | -0.5 | 10 | ||
| NRC | -0.5 | 6.8 | ||
| CMI | -4.0 | 24 | ||
| RMTC | -5.3 | 12 | ||
| SSM | -1.4 | 10 | ||
| STUK | -3.9 | 8.5 | ||
| NRPA | 3.2 | 8.8 | ||
| SMU | -4.7 | 25 | ||
| IAEA | -0.4 | 10 | ||
| HIRCL | 3.0 | 12 | ||
| ITN | -7.1 | 13 | ||
| NIST | -0.6 | 11 | ||
| LNMRI | 1.0 | 15 | ||
| CNEA | 12 | 18 | ||
| SCK-CEN | -1.5 | 16 | ||
| CIEMAT | 2.3 | 11 | ||
| VINS | 0.0 | 14 | ||
| Nuc. Malaysia | -1.7 | 14 | ||
| AECS-NRLM | 0.7 | 24 | ||
| KRISS | -3.3 | 8.0 | ||
| NMISA | -0.1 | 11 | ||
| BRMD, DMSc | 1.8 | 11 | ||
| BARC | 3.2 | 11 | ||
| NIM | 1.0 | 10 | ||
| PTKMR-BATAN | 2.3 | 19 | ||
| NRSL/INER | -1.9 | 8.2 | ||
| NIS | 0.3 | 14 |
| Metrology area, Sub-field | Ionizing Radiation, Section I (x and gamma rays, electrons) |
| Description | Measurement of absorbed dose to water for Cobalt 60 |
| Time of measurements | 2005 - 2008 |
| Status | Approved for equivalence |
| Final Reports of the comparisons | |
| References | |
| Measurand | Absorbed dose rate to water 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 | Resuts published on 27 April 2010 Last results update: 07 November 2018 SIM.RI(I)-K4, EUROMET.RI(I)-K4 and EURAMET.RI(I)-K4.2 results are linked to those of BIPM.RI(I)-K4 Absorbed dose to water, radiation type: Co-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 |
| ITN-LMRIR |
Institute for Nuclear Technology, 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 |
| NPL |
National Physical Laboratory, United Kingdom, EURAMET |
| 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 |
| 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)-K4, SIM.RI(I)-K4, EUROMET.RI(I)-K4, EURAMET.RI(I)-K4.2, EURAMET.RI(I)-K4.1 and APMP.RI(I)-K4
MEASURAND Absorbed dose to water
Radiation quality Co-60 beam
The key comparison reference value is the BIPM evaluation of absrobed dose to water.
BIPM.RI(I)-K4
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 SIM.RI(I)-K4 to BIPM.RI(I)-K4
The relative value xi is the comparison result for laboratory i participant in SIM.RI(I)-K4 and was normalized to the value of NRC acting as the linking laboratory (see SIM.RI(I)-K4 Final Report).
The degree of equivalence of each laboratory i participant in SIM.RI(I)-K4 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 EUROMET.RI(I)-K4 to BIPM.RI(I)-K4
The relative value xi is the comparison result for laboratory i participant in EUROMET.RI(I)-K4 and is linked to the BIPM.RI(I)-K4 via the nine linking laboratories ARPANSA, BEV, ENEA-INMRI, LNE-LNHB, METAS, MKEH, NRC, PTB and VSL (see EUROMET.RI(I)-K4 Final Report).
The degree of equivalence of each laboratory i participant in EUROMET.RI(I)-K4 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)-K4.1 to BIPM.RI(I)-K4
The linking of EURAMET.RI(I)-K4.1 to BIPM.RI(I)-K4 was made via BEV, LNE-LNHB and METAS, having participated in both comparisons.
The degree of equivalence of each laboratory i participant in EURAMET.RI(I)-K4.1 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).
Linking EURAMET.RI(I)-K4.2 to BIPM.RI(I)-K4
The linking of EURAMET.RI(I)-K4.2 to BIPM.RI(I)-K4 was made via BEV having participated in both comparisons.
The degree of equivalence of each laboratory i participant in EURAMET.RI(I)-K4.2 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 APMP.RI(I)-K4 to BIPM.RI(I)-K4
The linking of APMP.RI(I)-K4 to BIPM.RI(I)-K4 was made via ARPANSA, NMIJ-AIST and PTB having participated in both comparisons.
The degree of equivalence of each laboratory i participant in APMP.RI(I)-K4 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.
BIPM.RI(I)-K4, SIM.RI(I)-K4, EUROMET.RI(I)-K4, EURAMET.RI(I)-K4.2, EURAMET.RI(I)-K4.1 and APMP.RI(I)-K4
MEASURAND Absorbed dose to water
Radiation quality Co-60 beam
BIPM.RI(I)-K4 - Laboratory measurements
xi : ratio of the measurement made at the BIPM by laboratory i to that of the BIPM
ui : combined standard uncertainty of the ratio xi
-K4 LIM 2022-03-08_2.jpg)
SIM.RI(I)-K4 - Laboratory measurements
xi : result of measurement carried out at laboratory i converted to absorbed dose through the NRC measurements at the BIPM (See SIM.RI(I)-K4 Final Report)
ui : combined standard uncertainty of xi
-K4_LIM.PNG)
EUROMET.RI(I)-K4 - Laboratory measurements
xi : result of measurement carried out at laboratory i converted to absorbed dose through nine NMI measurements at the BIPM (See EUROMET.RI(I)-K4 Final Report)
The linking laboratories are MKEH, LNE-LNHB, PTB, ENEA, ARPANSA, NRC, BEV, METAS and VSL.
ui : combined standard uncertainty of xi
-K4_LIM.PNG)
EURAMET.RI(I)-K4.2 - Laboratory measurements
xi : result of measurement carried out at laboratory i linked via BEV, LNE-LNHB and METAS.
ui : combined standard uncertainty of xi
-K4.2_LIM.PNG)
EURAMET.RI(I)-K4.1 - Laboratory measurements
xi : result of measurement carried out at laboratory i linked via BEV.
ui : combined standard uncertainty of xi
-K4.1_LIM.png)
APMP.RI(I)-K4 - Laboratory measurements
xi : result of measurement carried out at laboratory i linked via ARPANSA, NMIJ-AIST and PTB.
ui : combined standard uncertainty of xi
-K4 LIM 2022-03-08.jpg)
