ENEA EXTREMITY DOSEMETER BASED ON LiF(Mg,Cu,P) TO EVALUATE H_p(3,α)

摘要

Recent epidemiological studies suggest a rather low-dose threshold (<0.5 Gy) for the induction of a cataract of the eye lens. Some other studies even assume that there is no threshold at all. Therefore, protection measures have to be optimised and current dose limits for the eye lens may be reduced in the future. ICRP Publication 103 on H_p(d), in §(136), reads that'... a depth d=3 mm has been proposed for the rare case of monitoring the dose to the lens of the eye. In practice, however, H_p(3) has rarely been monitored and H_p(0.07) can be used for the same monitoring purpose...'. As recommended on the EU 'Technical recommendations for monitoring individuals occupationally exposed to external radiation', a test on the ENEA TL extremity dosemeter is herein reported. The results within the actual EU founded Optimization of RAdiation protection for MEDical staff (ORAMED) Project, whose WP2 is aimed at the quantity H_p(3) and eye lens dosimetry in practice, are taken into account. The paper summarises the main aspects of the study carried out at ENEA-Radiation Protection Institute (Bologna, Italy) to provide practical solutions (in the use and the design) to evaluate the response of the ENEA TL extremity dosemeter in terms of H_p(3).