PRODUCTS

Thermoluminescent Dosimeters (TLD): Learn more about TLD's on the nukeworker site.

TLD:The dosimeter of choice is a Panasonic Model UD-802 Thermoluminescent dosimeter (TLD) in a heat sealed hanger. The Model 802 is the industry standard for measuring radiation dose, and the most tissue equivalent dosimeter available today. It measures X-rays, gamma rays, Beta emitters, and thermal neutrons. Pretty much anything you are wearing an external dosimeter for. They can be used to measure whole body dose or dose to extremities such as the hands or feet.

Control Dosimeters: Control dosimeters measure exposure from non-occupational sources such as natural background radiation and irradiation that may occur during badge shipment. They are issued with all dosimeters for a specified wearing period.

Extremity TLD: CHP Dosimetry offers TLD Rings or the Panasonic Model UD-802 to measure whole body dose or dose to extremities such as the hands (Rings on fingers, Model UD-802 on the wrist or ankle). Extremity dosimeters are assigned to the specified extremity (right or left), as the dose will be assigned accordingly. Extremity dosimeters are worn when exposed to non-uniform radiation fields where the hands or feet are exposed to higher radiation doses.

TLD Rings: TLD rings are worn when handling radiation sources where significant exposure occurs to the hands and fingers. You should never pick up a source with your hands, but even with long handled tongs or other devices, your fingers may be receiving significantly higher doses than the rest of your body. To measure this dose we place TLD material in rings which are worn on a specified hand (right or left). The label should always be pointed towards the radiation source (either facing inward on the hand, or outward depending on the exposure condition). Rings are worn on the specified hand, and dose is assigned accordingly.

CR-39: This is a plastic material that measures fast neutrons and other high energy particles. It is typically used to measure fast neutrons, but is capable of measuring high energy particles such as those found around accelerators, nuclear reactors, in space or high altitude airline flights. Typical users include personnel working around accelerators, nuclear reactors, and other fast neutron sources. CR-39 is the neutron measuring component of the TLD-NEU dosimeter.

TLD-NEU: This is a combination of TLD and CR-39 for radiation fields that include those measured by TLD (beta and gamma) that include fast neutrons. This could be an accelerator facility, a radiation therapy suite, a nuclear reactor, or other radiation sources that produces fast neutrons. It looks identical to the TLD as the CR-39 is inside the hanger.

Environmental Dosimeters: CHP Dosimetry uses sealed TLDs to measure environmental doses. There are two methods of environmental monitoring, one yields a dose value, and the other indicates measured response of the dosimeter (basically a raw uncorrected reading). The dose reading includes a background subtraction to indicate readings above background. This is the more common request. However, if you are interested in what the actual background radiation in a particular place is, you may want the uncorrected reading. If a raw reading is desired, CHP Dosimetry can issue dosimeters to be used alongside your current vendor’s for one issue period. This allows you to compare our readings with the units you are accustomed to. These dosimeters are provided free of charge for new accounts. They look identical to the TLD. They can be placed in whirl packs or other packaging that your system now uses.

RADTRIAGE: The RADTRIAGE dosimeter is used in emergency situations where very high doses of radiation can be expected. First responders and emergency personnel responding to a dirty bomb, or other radiation threat will have immediate indication of their radiation dose. The RADTRIAGE provides a visual indication of dose from 0-1000 Rem (0-10 Sv – can be made in SI units), that allows emergency personnel the ability to monitor their doses in real time. The dosimeter will let you know when it is time to evacuate personnel to prevent radiation sickness. It also lets you know when personnel MUST be evacuated due to intense radiation exposures.

Emergency Response Dosimeters: You may have some emergency responders that don't need the routine TLD service, but would like to have them wear something in the unlikely event they got exposed to radiation fields. Email or call us to see what we can do for an annual issue of TLD for emergency response personnel. This type of monitoring is for informational purposes only. You will be glad to have reliable data should the need arise.

Special Applications: CHP Dosimetry is always interested in furthering science, and helping you with special applications. If you have a radiation field, and would like to measure it with our dosimeters, we are willing to work with you to get the desired results. As the purchaser of dosimetry, it is your responsibility to measure the radiation dose to employees. If there are specific radiation field considerations that must be addressed when assigning or reading dosimeters, please call to make sure we get your needs met.