How do TLD badges work?

A TLD readout instrument is used to heat the chips and measure the emitted light. The amount of light emitted is related to the dose of radiation absorbed by the TLD and to the radiation exposure dose of the individual. TLDs are beginning to replace film badges.

What is TLD in radiation?

Thermoluminescent dosimeter (TLD) is a passive radiation detection device that is used for personal dose monitoring or to measure patient dose.

Where do you wear TLD badge on?

The complete Personnel Monitoring TLD badge consists of a TLD card and a plastic cassette for holding the TLD card. The badge is affixed to the clothing of a person with the help of a crocodile clip attached to the badge. Measurement of output from Co-60 units and accelerators used in medicine and industry.

What are the cons of thermoluminescent dosimeter use?

One of the downsides that come with using a TLD dosimeter is that it can only be read one time. A TLD dosimeter reading can be used multiple times; however, they cannot be read more than once, after the TLD dosimeter has been used. This occurs because TLD is “zeroed” at the end of the readout process.

What are the cons of thermoluminescent dosimeter usage?

Disadvantages of TLDs

• Each dose cannot be read out more than once.
• The readout process effectively “zeroes” the TLD.

How often should a TLD badge be replaced?

3 monthly intervals
Badge dosimeters As part of radiation safety practices, the TLD in every badge is replaced at 3 monthly intervals and checked for absorbed dose. The purpose of TLD badges is not to protect staff from acute radiation exposure.

What are the disadvantage of TLD?

Disadvantages of TLDs Each dose cannot be read out more than once. The readout process effectively “zeroes” the TLD.

What is the maximum period of time that a thermoluminescent dosimeter may be worn as a personal device?

Some of the advantages of the optically stimulated luminescence (OSL) dosimeter are: 1. can be used for up to 1 year.

Where should a TLD badge be worn?

Place the badge in the neck or chest area, facing the radiation source. If you wear a lead apron, the badge must be OVER the lead, not underneath it.