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Radiological Monitoring of the Workplace

According to Article 12 of the Regulation on Dose Limits, Recommended Dose Constraints and Assessment of Individual Exposure (Official Gazette / NN 53/18, 6/22):

  1. The licence holder is required to ensure testing as part of radiological monitoring of the workplace.
  1. Radiological monitoring of the workplace, as necessary, includes:
a) Measurement of ambient dose equivalent rate in the vicinity of ionising radiation sources, at worker locations, and on the outer side of the room containing the source, or at other positions as advised by a radiation protection expert, depending on the source’s location and type, specifying the type and quality of ionising radiation.

b) Measurement of radionuclide activity concentration in the air of the working space and at air exhaust or ventilation discharge points, as well as measurement of surface contamination of objects, floors, walls, and other surfaces contaminated by radionuclides during use of open sources. This includes identifying the type, physical and chemical properties of radionuclides, and conducting direct observations at the place of use, temporary storage, or discharge to determine whether open radioactive sources can be used, stored, or discharged into the environment safely.

c) Measurement of ambient dose equivalent rate and estimation of effective ionising radiation dose or activity concentration of radioactive substances at locations where workers and other individuals may be present while radiation sources are in use.

  1. Testing as part of radiological workplace monitoring must be performed by authorised expert technical services.
  1. Such testing must be carried out:

a) Before commissioning a source of ionising radiation (acceptance testing)

b) After major repairs, modifications, or component replacements that may significantly affect radiation conditions (extraordinary testing)

c) Before use of the source at a new location if relocated (extraordinary testing)

d) After construction works or repurposing of the room housing the radiation source if protection conditions could be altered (extraordinary testing)

e) After any change in the use of the source that affects the previously established condition (extraordinary testing)

f) Based on the advice of a radiation protection expert (extraordinary testing)

g) Annually (regular testing).

  1. Exceptionally, radioactive contamination checks may also be carried out by the licence holder.
  1. The licence holder must record the results of testing and use them, if necessary, for assessing individual radiation exposure in accordance with specific regulations.