[Occupational exposure to X and gamma rays in Poland based on the present and past results (Nofer Institute of Occupational Medicine data].

BACKGROUND

The paper presents the results of the assessment of effective doses received by people occupationally exposed to X and gamma rays in Poland in 2011 provided by the Nofer Institute of Occupational Medicine in Lodz. The results were compared with the data collected between 1966-2010.

MATERIALS AND METHODS

The dosimetric service was provided for people occupationally exposed to ionizing radiation in terms of personal dose equivalent Hp(10). In 2011 the Institute's program of individual dosimetry Hp(10) covered more than 28 000 workers in 4007 laboratories (mainly of health service departments). The measurements were carried out using the film method, according to the research procedure (number AB 327) accredited by the Polish Centre for Accreditation.

RESULTS

In 2011 the average annual dose Hp(10) was equal to 0.5 mSv (annual limit for Hp(10) is equal to 20 mSv), which maintained at the approximate level of about 0.5 mSv for the last ten years. At present, more than 99% of annual doses do not exceed 5% of the annual level i.e. the level of 1 mSv. Only one case of exceeding the annual limit was recorded in 2011.

CONCLUSIONS

The comparison between the 2011 data on the workers ( mostly health service workers) occupationally exposed to X and gamma rays and the data collected in the previous years indicates a satisfactory level of radiation protection in Poland.