Comparison
Comparison close

BIPM.RI(I)-K5, EURAMET.RI(I)-K5.1 and APMP.RI(I)-K5

 

MEASURAND       Air kerma

Radiation quality    Cs-137 beam

 

Degrees of equivalence, Di and expanded uncertainty Ui (k = 2)

Air kerma in Cs-137
Di  (mGy/Gy)
Participating institutes
Comparison
Comparison close

BIPM.RI(I)-K5, EURAMET.RI(I)-K5.1 and APMP.RI(I)-K5

 

MEASURAND       Air kerma

Radiation quality    Cs-137 beam

 

Degrees of equivalence, Di and expanded uncertainty Ui (k = 2)

LABi Di Uneg,i Upos,i
mGy/Gy
mGy/Gy
mGy/Gy
GUM -0.5 5.8
IST/ITN 1.3 4.2
LNE-LNHB -1.6 5.2
BEV 4.1 6.2
MKEH 5.3 5.0
VNIIM 1.3 5.4
KRISS -1.4 4.4
NIST -1.0 7.0
NMIJ -2.3 5.2
PTB 2.4 5.4
NIM -3.3 4.2
ININ 4.8 4.0
VSL -4.8 7.6
SMU 5.1 5.4
VINS -3.3 20.2
INER -4.6 8.9
CIEMAT 4.2 17.0
Participating institutes
BIPM.RI(I)-K5
EURAMET.RI(I)-K5.1
APMP.RI(I)-K5
Comparison
Comparison close
BIPM.RI(I)-K5
Metrology area, Sub-field Ionizing Radiation, Section I (x and gamma rays, electrons)
Description Measurement of air kerma for Caesium 137
Time of measurements 1994 -
Status Continuous, approved for equivalence
Final Reports of the comparisons
References

Technical Protocol for ongoing BIPM Dosimetry comparisons

Measurand Air kerma
Parameters Radiation type: Cs-137 gamma rays
Transfer device Ionization chambers
Comparison type Key Comparison
Consultative Committee CCRI (Consultative Committee for Ionizing Radiation)
Conducted by BIPM (Bureau International des Poids et Mesures)
Comments The Final Report for each bi-lateral comparsion is listed in the tab "Participants"
First results published on 29 November 2012
Last update: 28 August 2018
 
Pilot institute BIPM
Bureau International des Poids et Mesures
BIPM - International Organization
Contact person C. Kessler

+33 (0) 1 45 07 70 84
First Name Last Name
wwww@ww.www +356719836 Institute 1 Institute 1 Khmelnitskiy
Pilot laboratory
BIPM

Bureau International des Poids et Mesures, BIPM - International Organization, N/A

BEV

Bundesamt für Eich- und Vermessungswesen, Austria, EURAMET

ENEA-INMRI

Istituto Nazionale di Metrologia delle Radiazioni Ionizzanti, Italy, EURAMET

GUM

Glowny Urzad Miar, Central Office of Measures, Poland, EURAMET

ININ

Instituto Nacional de Investigaciones Nucleares, Mexico, SIM

ITN

Instituto Tecnólogico e Nuclear, now IST-LPSR, Instituto Tecnológico e Nuclear, Laboratório de Proteção e Segurança Radiológica, Campus Tecnológico e Nuclear, Portugal, EURAMET

KRISS

Korea Research Institute of Standards and Science, Korea, Republic of, APMP

LNE-LNHB

Commissariat à l'énergie atomique / Laboratoire National Henri Becquerel, France, EURAMET

NIM

National Institute of Metrology, China, APMP

NIST

National Institute of Standards and Technology, United States, SIM

NMIJ AIST

National Metrology Institute of Japan, Japan, APMP

OMH

Országos Mérésügyi Hivatal; Subsequently MKEH, now BKFH, Hungary, EURAMET

PTB

Physikalisch-Technische Bundesanstalt, Germany, EURAMET

SMU

Slovensky Metrologicky Ustav, Slovakia, EURAMET

VNIIM

D.I. Mendeleyev Institute for Metrology, Rosstandart, Russian Federation, COOMET

VSL

VSL, Netherlands, EURAMET

Comparison
Comparison close

BIPM.RI(I)-K5, EURAMET.RI(I)-K5.1 and APMP.RI(I)-K5

 

MEASURAND       Air kerma

Radiation quality    Cs-137 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  EURAMET.RI(I)-K5.1 to BIPM.RI(I)-K5

The linking of EURAMET.RI(I)-K5.1 to BIPM.RI(I)-K5 is made via BEV (Austria) who participated in both comparisons.

 

Linking  APMP.RI(I)-K5.1 to BIPM.RI(I)-K5

The linking of APMP.RI(I)-K5 to BIPM.RI(I)-K5 is made via KRISS (Korea) and NMIJ AIST (Japan) who participated in both comparisons.

Comparison
Comparison close

BIPM.RI(I)-K5, EURAMET.RI(I)-K5.1 and APMP.RI(I)-K5

 

MEASURAND       Air kerma

Radiation quality    Cs-137 beam

 

xi     ratio of the measurement of laboratory i to that of the BIPM

ui     combined standard uncertainty of the ratio xi

 

BIPM.RI(I)-K5

 

EURAMET.RI(I)-K5.1

 

APMP.RI(I)-K5