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)

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

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
Participating institutes
BIPM.RI(I)-K4 (older that 10 y)
BIPM.RI(I)-K4
EUROMET.RI(I)-K4
EUROMET.RI(I)-K4.1
EUROMET.RI(I)-K4.2
APMP.RI(I)-K4
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, 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

 

 

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

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

 

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

 

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

 

 

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