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Fourth IRMF comparison of calibrations of portable gamma-ray dose-rate monitors 2001-2002.

Lewis, V E; McClure, D R* (2002) Fourth IRMF comparison of calibrations of portable gamma-ray dose-rate monitors 2001-2002. NPL Report. CIRM 55

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Abstract

The Ionising Radiations Metrology Forum (IRMF) organised a fourth comparison of calibrations of gamma-ray dose-rate monitors in which fifteen establishments in the UK participated. The exercise involved the circulation of three gamma-ray monitors for calibration in the fields produced using 137Cs, 241Am and 60Co.
The instruments used were an Electra with MC 20 probe, a Mini-Instruments Mini-rad 1000 and a Siemens electronic personal dosemeter Mk 2 (EPD). The responses relative to ‘true’ dose equivalent rate were calculated by the individual participants and submitted to the authors for analysis along with details of the facilities and fields employed. Details of the estimated uncertainties were also reported.
The results are compared and demonstrate generally satisfactory agreement between the participating establishments. However, the participants’ treatment of uncertainties needs improvement and demonstrates a need for guidance in this area.

Item Type: Report/Guide (NPL Report)
NPL Report No.: CIRM 55
Subjects: Ionising Radiation
Ionising Radiation > Dosimetry
Last Modified: 02 Feb 2018 13:17
URI: http://eprintspublications.npl.co.uk/id/eprint/2531

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