CCRI(II)-K2.Tc-99
MEASURAND Activity concentration of Tc-99 solution
NOMINAL VALUE 50 kBq g-1 to 100 kBq g-1
Degrees of equivalence represented by Di = (xi - xR) and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in kBq g-1.
CCRI(II)-K2.Tc-99
MEASURAND Activity concentration of Tc-99 solution
NOMINAL VALUE 50 kBq g-1 to 100 kBq g-1
Degrees of equivalence represented by Di = (xi - xR) and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in kBq g-1.
| LABi | Di | Uneg,i | Upos,i | |
|---|---|---|---|---|
kBq g-1 |
kBq g-1 |
kBq g-1 |
||
| BARC | -1.07 | 0.48 | ||
| BIPM | -0.36 | 0.45 | ||
| CIEMAT | -0.73 | 0.48 | ||
| CNEA | 0.13 | 0.32 | ||
| ENEA-INMRI | 0.12 | 0.39 | ||
| IFIN-HH | -0.02 | 0.50 | ||
| JRC | 0.15 | 0.62 | ||
| LNE-LNHB | 0.01 | 0.37 | ||
| NIST | 0.10 | 0.38 | ||
| NMIJ | 2.95 | 1.03 | ||
| NMISA | 0.58 | 0.48 | ||
| NPL | 0.25 | 0.99 | ||
| NRC | 2.55 | 1.56 | ||
| POLATOM | 0.69 | 0.45 | ||
| PTB | 0.17 | 0.36 | ||
| VNIIM | -3.45 | 0.60 |
| Metrology area, Sub-field | Ionizing Radiation, Section II (Measurement of Radionuclides) |
| Description | Activity concentration of the same Tc-99 solution |
| Time of measurements | 2012 - 2013 |
| Status | Approved for equivalence |
| Final Reports of the comparisons | |
| References | |
| Measurand | Activity concentration |
| Transfer device | Radioactive solution |
| Comparison type | Key Comparison |
| Consultative Committee | CCRI (Consultative Committee for Ionizing Radiation) |
| Conducted by | CCRI (Consultative Committee for Ionizing Radiation) |
| Comments | Results published 06 February 2026 |
| Pilot institute |
NPL
National Physical Laboratory United Kingdom |
| Contact person | A. Pearce +44 (0) 20 8943 6699 |
| Pilot laboratory | |
|---|---|
| NPL |
National Physical Laboratory, United Kingdom, EURAMET |
| BARC |
Bhabha Atomic Research Centre, India, APMP |
| BIPM |
Bureau International des Poids et Mesures, BIPM - International Organization, N/A |
| CIEMAT |
Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas, Spain, EURAMET |
| CNEA |
National Commission of Atomic Energy, Argentina, SIM |
| ENEA-INMRI |
Istituto Nazionale di Metrologia delle Radiazioni Ionizzanti, Italy, EURAMET |
| IFIN-HH |
"Horia Hulubei" National Institute of Research and Development for Physics and Nuclear Engineering, Romania, EURAMET |
| JRC |
Joint Research Centre, European Union, EURAMET |
| LNE-LNHB |
Commissariat à l'énergie atomique / Laboratoire National Henri Becquerel, France, EURAMET |
| NIST |
National Institute of Standards and Technology, United States, SIM |
| NMIJ AIST |
National Metrology Institute of Japan, Japan, APMP |
| NMISA |
National Metrology Institute of South Africa, South Africa, AFRIMETS |
| NRC |
National Research Council, Canada, SIM |
| POLATOM |
Radioisotope Centre Polatom, Poland, EURAMET |
| PTB |
Physikalisch-Technische Bundesanstalt, Germany, EURAMET |
| VNIIM |
D.I. Mendeleyev Institute for Metrology, Rosstandart, Russian Federation, COOMET |
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CCRI(II)-K2.Tc-99
MEASURAND Activity concentration of Tc-99 solution
NOMINAL VALUE 50 kBq g-1 to 100 kBq g-1
The key comparison reference value xR and its associated standard uncertainty uR is based upon the power-moderated mean (PMM) of the reported results, excluding those of NMIJ, NRC and VNIIM as described in page 9 and Table 8 of the CCRI(II)-K2.Tc-99 Final report.
xR = 56.45 kBq g-1 uR = 0.13 kBq g-1
The degree of equivalence of laboratory i relative to the key comparison reference value xR is given by a pair of terms, both expressed in kBq g-1:
Di = (xi - xR) and its expanded uncertainty Ui at a 95 % level of confidence as described in page 9 of the CCRI(II)-K2.Tc-99 Final report.
CCRI(II)-K2.Tc-99
MEASURAND Activity concentration of Tc-99 solution
NOMINAL VALUE 50 kBq g-1 to 100 kBq g-1
xi measurement value submitted by institute i, Labi
ui combined standard uncertainty of xi
| Labi | xi | ui | |
| / kBq g-1 | / kBq g-1 | ||
| BARC | 55.38 | 0.22 | |
| BIPM | 56.09 | 0.20 | |
| CIEMAT | 55.72 | 0.22 | |
| CNEA | 56.58 | 0.10 | |
| ENEA-INMRI | 56.57 | 0.16 | |
| IFIN-HH | 56.43 | 0.23 | |
| JRC | 56.6 | 0.3 | |
| LNE-LNHB | 56.46 | 0.14 | |
| NIST | 56.55 | 0.15 | |
| NMIJ | 59.4 | 0.5 | |
| NMISA | 57.03 | 0.22 | |
| NPL | 56.7 | 0.5 | |
| NRC | 59.00 | 0.77 | |
| POLATOM | 57.14 | 0.20 | |
| PTB | 56.62 | 0.13 | |
| VNIIM | 52.995 | 0.276 |
