Dosimeter Badge Requirements
(2) Each personal dosimeter may not be assigned and worn by a single person. After returning your monitoring badges at the end of each quarter, the badges are sent to Mirion Technologies for processing. EHS receives and reviews dose reports several weeks after the end of a monitoring period. EHS has set test values at doses equal to or less than 10% of the federal and state dose limits. If a dose is reported that exceeds the test value, EHS will contact you to determine if the reported dose is likely to be correct and to investigate the causes of the dose to minimize the dose in the future. Badges do not protect you from radiation. The purpose of a dosimetry sticker is to document your occupational radiation exposure and demonstrate compliance with annual dose limits and ALARA values. Badges also provide the Radiation Protection Bureau with valuable information about the safety of your work environment and the quality of the radiation protection program in place for your area. A Webster 2 calculation can also be used to calculate the shield obtained by wearing a lead deck with two dosimeters.
When using this type of calculation, one badge is worn on the outside of the collar of the lead apron, while the other badge is worn at the waist under the lead apron. Flat and ocular doses are calculated using the flat dose delivered to the collar badge. The low dose corresponds to 1.5 of the low dose of the waste badge plus 0.04 of the low dose of the necklace badge. Each dosimeter is identified by the cervix or waist. These wear points are not replaceable. When you receive your dosimeters, a control chart is included. The control badge is designed to subtract the transit and background exposure that your badges received while they were not worn. This exposure is deducted from the identity cards so that the occupational exposure can be correctly declared. All badges must be kept away from radioactive materials or areas with high levels of radiation to prevent badges from being exposed to radiation during non-use. While a designated storage location should help prevent the loss of identification, if an employee loses their dosimeter at any time during the reading period, they should immediately request a replacement ID. Anyone working with radioactive material or equipment that emits X-rays should wear a dosimeter badge.
A dosimeter is a cheap form of insurance that ensures that an employee is not exposed to high exposures that could make an employer responsible for injuries. Do not bring Princeton`s surveillance badges to another institution. Princeton University only provides you with badges to measure the radiation dose you receive when you work at Princeton University. If you are doing radiation work at another facility, it is the responsibility of that facility to provide you with monitoring badges. However, Princeton University should continue to control the dose you receive when working at Princeton so that your total professional dose does not exceed legal dose limits. If another institution issues you radiation monitoring badges, inform EHS. EHS will contact this facility and ask for copies of your dose records. Mirion Technologies offers you the option to create an online account so that you can be notified when your dose results are available online and you can view your dose report online. Mirion calls this feature MDR (My Dose Review).
When you receive your badges, EHS will provide you with instructions on how to set up this account. You can also request a summary of your monitoring card results by calling EHS. You are not required to view your dose report. However, this is the only way to be regularly informed about the results of your dose. The RSO always reviews quarterly dose reports and will contact you if they detect doses of concern. 3. Aluminium plates shall be replaced at least once a month and all other personal dosimeters replaced at least once a quarter. All personal dosimeters should be evaluated at least quarterly or immediately after replacement, whichever is most frequent. There are three types of personal dosimeters: aluminum “badges”, the new Luxel technology and TLDs (thermoluminescence dosimeters). Each can be useful for different needs. These are used and analyzed monthly or quarterly (quarterly tends to be cheaper). If you are using a quarterly monitoring period, we recommend that you use TLDs or the Luxel type and not movies from the service provider you are using.
Questions related to the choice of dosimetry for radiation monitoring include: Badges must be replaced at a selected reporting interval, usually monthly or quarterly. New dosimeters are distributed to employees, while dosimeters from the previous interval must be returned to the dosimetry provider for analysis. All dosimeters, including the tell-tale, must be packed and returned at the same time. This ensures that all badges have been exposed to the same background and transit radiation values. Doses are administered in millirem. The minimum dose reported for X-rays for body badges is 10 millirem for X-rays and 20 millirem for ring badges. If no dose is reported, the total dose received was less than the minimum reported dose. Fetal monitors should be worn as close as possible to the embryo or fetus to best reflect exposure to the embryo or fetus.