BIPM.RI(I)-K4, EURAMET.RI(I)-K4.1, EURAMET.RI(I)-K4.2, APMP.RI(I)-K4 and EURAMET.RI(I)-K4.3

MEASURAND                 Absorbed dose to water

Radiation quality        Co-60 beam

 

Degrees of equivalence represented by Di = (xI -1) and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in mGy/Gy.

Absorbed dose to water
Di  (mGy/Gy)
Participating institutes

Data older than 15 years are no longer included for degrees of equivalence

BIPM.RI(I)-K4, EURAMET.RI(I)-K4.1, EURAMET.RI(I)-K4.2, APMP.RI(I)-K4 and EURAMET.RI(I)-K4.3

MEASURAND                 Absorbed dose to water

Radiation quality        Co-60 beam

 

Degrees of equivalence represented by Di = (xI -1) 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
ENEA -0.1 8.8
VNIIFTRI -1.4 8.6
LNE-LNHB -1.9 7.8
METAS 1.1 10.4
PTB -1.3 7.6
NPL 2.3 14.2
VSL -3.0 10
BEV -0.3 8.2
GUM 3.0 7.0
ARPANSA -0.5 10.2
NRC -0.5 6.8
BFKH -3.5 9.0
NIM 2.7 7.2
KRISS -1.4 7.6
NMIJ -4.8 8.0
SCK-CEN -1.5 15.5
CIEMAT 2.3 11.1
VINS 0.0 14.4
Nuc. Malaysia -1.7 14.2
AECS-NRLM 0.7 24.0
NMISA -0.1 11.4
BRMD, DMSc 1.8 10.8
BARC 3.2 11.0
PTKMR-BATAN 2.3 18.8
NRSL/INER -1.9 8.2
NIS 0.3 14.2
SSM 1.2 9.1
DSA 2.2 9.7
STUK 2.4 9.1
DTU 1.6 11.5
CIEMAT 0.2 10.7
IAEA -0.2 10.3
Participating institutes
BIPM.RI(I)-K4
EURAMET.RI(I)-K4.1
EURAMET.RI(I)-K4.2
APMP.RI(I)-K4
EURAMET.RI(I)-K4.3

Data older than 15 years are no longer included for degrees of equivalence

APMP.RI(I)-K4
Metrology area, Sub-field Ionizing Radiation, Section I (x and gamma rays, electrons)
Description Comparison of national absorbed dose to water standards
Time of measurements 2009 - 2010
Status Approved for equivalence
Final Reports of the comparisons
References

APMP.RI(I)-K4 Technical Protocol

Measurand Absorbed dose to water in mGy/s
Parameters Radiation type: Co-60
Transfer device Three ionization chambers as transfer standards and two link laboratories to the BIPM
Comparison type Key Comparison
Consultative Committee CCRI (Consultative Committee for Ionizing Radiation)
Conducted by APMP (Asia Pacific Metrology Programme)
Pilot institute NRSL/INER
Institute of Nuclear Energy Research
Chinese Taipei
Contact person Chien-Hau Chu

+886 3 471 1400 ext 7741
First Name Last Name
wwww@ww.www +356719836 Institute 1 Institute 1 Khmelnitskiy
Pilot laboratory
NRSL/INER

Institute of Nuclear Energy Research, Chinese Taipei, APMP

AECS-NRML

Atomic Energy Commission of Syria, Syrian Arab Republic, APMP

ARPANSA

Australian Radiation Protection and Nuclear Safety Agency, Australia, APMP

BARC

Bhabha Atomic Research Centre, India, APMP

DMSc

Department of Medical Sciences, Thailand, APMP

KRISS

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

NIM

National Institute of Metrology, China, APMP

NIS

National Institute for Standards, Egypt, AFRIMETS

NMIJ AIST

National Metrology Institute of Japan, Japan, APMP

NMISA

National Metrology Institute of South Africa, South Africa, AFRIMETS

Nuclear Malaysia

Malaysian Nuclear Agency, Malaysia, APMP

PTB

Physikalisch-Technische Bundesanstalt, Germany, EURAMET

PTKMR-BATAN

Center for Technology of Radiation Safety and Metrology, National Nuclear Energy Agency, Indonesia, APMP

BIPM.RI(I)-K4,  EURAMET.RI(I)-K4.1, EURAMET.RI(I)-K4.2, APMP.RI(I)-K4 and EURAMET.RI(I)-K4.3

 

MEASURAND                 Absorbed dose to water

Radiation quality        Co-60 beam

 

BIPM.RI(I)-K4

The key comparison reference value is the BIPM evaluation of absrobed dose to water.

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 = (xi - 1) x 1000 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)-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).

Linking EURAMET.RI(I)-K4.3 to BIPM.RI(I)-K4

VSL provides the link between the key comparison BIPM.RI(I)-K4 and EURAMET.RI(I)-K4.3, having participated in both comparisons. The linking process is described in Section 2.4 of the EURAMET.RI(I)-K4.3 Final Report.

The degree of equivalence of each laboratory i participant in EURAMET.RI(I)-K4.3 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).

BIPM.RI(I)-K4, SIM.RI(I)-K4, EUROMET.RI(I)-K4, EURAMET.RI(I)-K4.1, EURAMET.RI(I)-K4.2, APMP.RI(I)-K4 and EURAMET.RI(I)-K4.3

 

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

  Labi xi ui year of measurement
  ENEA 0.9999 0.0044 2007
  VNIIFTRI 0.9986 0.0043 2009
  LNE-LNHB 0.9981 0.0039 2013
  METAS 1.0011 0.0052 2013
  PTB 0.9987 0.0038 2015
  NPL 1.0023 0.0071 2017
  VSL 0.9970 0.0048 2017
  BEV 0.9997 0.0041 2020
  GUM 1.0030 0.0035 2020
  ARPANSA 0.9995 0.0051 2020
  NRC 0.9995 0.0034 2020
  BFKH 0.9965 0.0045 2021
  NIM 1.0027 0.0036 2021
  KRISS 0.9986 0.0038 2022
  NMIJ 0.9952 0.0040 2022

 

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

 

EUROMET.RI(I)-K4 - Laboratory measurements

See EUROMET.RI(I)-K4 Final Report.

 

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

  Labi xi ui year of measurement
  METAS 0.9980 0.0063 2013 - 2015
  BEV 1.0011 0.0057 2013 - 2015
  LNE-LNHB 0.9977 0.0052 2013 - 2015
  SCK-CEN 0.9985 0.0078 2013 - 2015
  VSL 0.9952 0.0058 2013 - 2015
  CIEMAT 1.0023 0.0056 2013 - 2015

 

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

  Labi xi ui year of measurement
  VINS 1.0000 0.0072 2017

 

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

  Labi xi ui year of measurement
  Nuc. Malaysia 0.9983 0.0071 2009
  AECS 1.0007 0.0115 2009
  KRISS 0.9967 0.0040 2009
  NMISA 0.9999 0.0057 2009
  DMSc 1.0018 0.0054 2010
  BARC 1.0032 0.0055 2010
  NIM 1.0010 0.0050 2010
  BATAN 1.0023 0.0094 2010
  INER 0.9981 0.0041 2010
  NIS 1.0003 0.0071 2010

 

EURAMET.RI(I)-K4.3 - Laboratory measurements

The measurement results are listed in Table 5 of the EURAMET.RI(I)-K4.3 Final Report.