Radiation dosimetry is offered by a number of companies in the US including CHP Dosimetry. They are all accredited by the National Institute of Standards and Technology through the NVLAP (100555-0) program. At the end of the day, no matter what dosimeter is used, they all meet the same accreditation requirements.

But there are big differences to you! Our price, products, and services far exceed what has come to be the “industry standard”.

If all vendor dosimeters are NVLAP Accredited, why should I go with CHP Dosimetry?

CHP Dosimetry gives you fast, personalized service, the kind of service big vendors offer only their largest customers. In addition, we have Certified Health Physicists on hand who can help you choose the appropriate dosimeters and help you deal with regulators, should you need it.

We provide this high level of service at a lower cost than the larger dosimeter companies because we can be more flexible in providing service (no one size fits none here) and we keep our overhead low. We purchase large quantities of dosimeters annually and pass the savings along to you. We are located in Oak Ridge, TN, the “Secret City” and birthplace of radiation dosimetry. So, when you have a technical question, you talk with one of our Health Physicists — without having to fight your way through customer service!

Lastly, we are a full service radiation protection company. If your employees are exposed to internal radiation [dose], we have Certified Health Physicists who can assess that for you too. If you have other [problems or] concerns related to radiation safety, we can refer our parent company, CHP Consultants, which provides radiological instrumentation, health physics, nuclear safety, shielding, and safety support services.

What is a Thermoluminescent Dosimeter (TLD)?

TLD’s are one of the most advanced applications of Thermoluminescent Detectors. Modern TLD Dosimeters measure the Skin Dose, Eye Dose and Deep Dose specified in current regulations, in addition to the total dose from other nuclear particles. They consist of one (rings) to four (whole body badges) separate detectors, which allow for discrimination of photon energies and the nature of the incident radiation. For more information, visit the Nukeworker site: Everything you wanted to know about TLD but were afraid to ask.

For more information on TLD visit: everything that you wanted to know about TLD but were afraid to ask.

Your prices seem very low compared to what we are now paying. Can you explain the difference?

Most people purchase dosimetry when they initially open their office. The cost seems relatively low, and the provider typically increases the price a little each year, so many people just pay it. After several years, the price increases add up and you may find yourself paying a very high price. Most vendors hope you will not discover this and continue to pay them (which is why they don’t post their prices). Some of our clients were paying over $1000 per year for what we charge $69.

CHP is committed to providing Clients with superior service and value. To this point, we have contracted with several badge suppliers to get better value for our clients. This has allowed us to maintain our price for over 9 years. To date, CHP has never increased the price of dosimetry in the 9 years we have been in business.

Why can’t I just use an area monitor to assess dose to all my employees?

Dosimeters can be used to measure the radiation dose to personnel, or they can assess the dose to a specific location. Dosimeters placed at a specific location are called Area Monitors. These dosimeters do not indicate dose to individuals, rather, they are typically placed to ensure that a specific location meets the requirements for public exposure (typically 100 mrem/year). They can be used as part of a formal investigation of excessive dose, however it must be kept in mind that the area monitor only assesses radiation that directly strikes it. So if for some reason there was shielding shadowing a source from that spot, the dose would not be recorded. Similarly, if there was a design where a particular spot was left unshielded, then the area monitor would receive a higher dose. Many times people put an area monitor in a place that is MOST LIKELY to receive a radiation exposure to demonstrate that exposure in excess of public limits are not exceeded in what is deemed to be a worst case scenario.

Area monitors are not appropriate for personnel exposure, because people do not spend much time in exactly that location. In addition, area monitors are in place 24 hrs a day, whereas people are not. Personnel dosimeters are designed to be worn on the torso of the body in a location that is closest to the radiation source. For example, if you were working in a room with a radiation source and the source was behind you while you were working, you would place the whole body dosimeter on your back! Dosimeters are used to provide an approximation of radiation exposure and are generally used in a way the provides the highest estimation of radiation dose to an individual. Since people may move around the room and orient themselves closer or further away (remember to minimize TIME, maximize DISTANCE, and utilize SHIELDING to keep your dose low) from radiation sources, the only way to accurately assess an individuals dose is to have them actually wear a dosimeter on their body.