Intercomparison 2013 on measurements of the personal dose equivalent Hp(10) in photon fields in the African region

Abstract

An intercomparison exercise on the measurement of personal dose equivalent Hp(10) was jointly organised by the International Atomic Energy Agency and the Nuclear Research Centre of Algiers through its Secondary Standard Dosimetry Laboratory in the African region. This intercomparison exercise was aimed at verifying the performance of the individual monitoring services of the participants in order to assess their capabilities to measure the quantity Hp(10) in photon (gamma and X ray) fields helping them to comply with dose limitation requirements. The scope of this intercomparison was aimed at passive dosemeters, which determine the personal dose equivalent in photon radiation fields, mainly for thermoluminescence and optically stimulated luminescence dosemeters. Twenty-seven countries from the Africa region and from outside Africa participated in this exercise. The intercomparison protocol, including the preparation of the dosemeters and the irradiation procedures, is described and the results are presented, analysed and discussed.

Evaluation of Dosimetric Performance and Global Uncertainty of the Harshaw 6600 Plus System Used to Staff Monitoring in Côte d’Ivoire

“…Generally, a good sensitivity of low energy X-rays between 20 and 250 kev is observed, however, the energy dependence is observed for these same x-ray beams or the relative response is between 0.97 and 1.47 compared to that of cesium (662 KeV) and cobalt (1250 Kev). This large difference in response is probably due to the dosimetric system which is not calibrated on X-ray and which does not use an appropriate dose algorithm incorporating the X-ray beam qualities for the evaluation of Hp (10) [16] An optimal operating value of the response is found at 80 kev. Nevertheless the relative response of photon energies to the normal incidence compared to the manufacturer [10] and the recommendations of [12] is satisfactory.…”