Environmental Science & Research - PersonalDosimetryService

By: Environmental Science & Research  06-Dec-2011

The NRL’s Personal Dosimetry Service is available to measure occupational dose to those exposed to ionising radiation in the course of their work.

In this section:

Trunk monitoring

Two systems are available for monitoring exposure to the trunk.  Both systems use Kodak Personal Monitoring Film, Type 2, in plastic holders.  The film gives a permanent re-examinable record of both quantitative and qualitative aspects of the radiation dose received by the wearer.

Situations in which the use of the film + blue holder dosemeter is of benefit include all situations the film + yellow holder dosemeter is of benefit, and:

  • Where x-ray machines, linear accelerators, and radioactive materials are used for treating disease.  This includes the following occupations: radiotherapists, radiation therapists, nuclear medicine radiographers involved in the use of iodine-131, medical physicists etc.

  • Where industrial radiography is carried out in non-destructive testing.

  • Where a wide range of sealed and unsealed radioactive materials are used as tracers in medical and other laboratories.

Extremity monitoring

The NRL offers a ring dosemeter that uses thermoluminescent material as a means of assessing radiation dose.  The ring holder comes in a single size and uses a small radiation sensitive element contained in a cavity in the ring.  The cavity is sealed with a black polythene cover.  An identification number and the wearer’s initials can be seen through the back of the ring cavity.

Situations in which the use of a ring dosemeter is of benefit are:

  • Where unsealed sources containing gamma and high-energy beta emitting radioactive materials are handled.  Appropriate nuclides include iodine-131, iodine-125, molybdenum-99, technetium-99m, thallium-201 and phosphorous-32.

  • Where hands are required to be close to sealed radioactive sources, such as in servicing or inspection operations (including wipe testing).
    In interventional and other diagnostic radiology practices where hands may be close to primary x-ray beams.

The following downloads are available:

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For any queries, please contact the Personal Dosimetry Service Team.

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