In 2011 in Central Laboratory for Radiological Protection about 4500 of employees exposed to ionizing radiation were monitored (standard monitoring cycle lasts 4 months). The group was divided into four subgroups: medical, scientific, industrial and others. Monitoring service was based on two doses assessment methods: Kodak films and MCP-N thermoluminescent detectors.

The results revealed that the average annual doses for employees in each particular group were 0.51 mSv (medical), 0.62 mSv (scientific), 0.48 mSv (industria l) and 0.44 mSv (others). The average annual dose for the entire monitored population was about 0.51 mSv. Comparing to the results from 1999, when about 6200 radiation workers were monitored, the average annual doses for industrial group decreased by 40%. Annual average dose in scientific and others groups increased by about 50%, whereas and in medicine by 40%.

Twelve cases of dose equivalents over the limits of 20 mSv (0.1% of all read outs) have been registered. Six of them occurred in the medical, three in the industrial and three in the scientific group. Almost 97% of all registered dose equivalents were less than 1mSv.

To sum up, in 2011 the laboratory carried out almost 10000 doses estimations from TLD rings dosimeters. There were no cases of doses exceeding of the acceptable limits for extremities.

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