Radiation area film badge

Employees working in the area where EB equipment is operating must be monitored for exposure to ionizing (mainly x-ray) radiation with film badges that detect and quantify any exposure to stray radiation. Employers must train workers thoroughly in the operation of the equipment and proper safety and hygiene, and must keep records of exposure of their personnel to ionizing radiation. 

A film badge worn by workers in areas where radiation exposure may occur indicates the extent of the exposure, should any have occurred. 

Personnel monitoring is required when an occupational worker is likely to receive an excess of 10% of the annual dose limit from radiation sources and for individuals entering high or very high radiation areas. Monitoring is accomplished by using film badges or thermoluminiscent dosimeters (TLD). 

Figure 5.10 Film badge for personal radiation monitoring. The various areas shown on the front of the badge provide for information to be obtained about the radiation reaching the frlm. The open " area may be covered with a a very thin mylar film which will allow betas to be detected in that aaea. 

Each employee classified as a radiation worker should be assigned a film badge to record lifetime occupational exposure. This badge must be worn at all times in a controlled radiation areas or near an operating x-ray source while performing work. 

The amount of radiation that an individual encounters can be measured by a film badge. This badge contains a piece of photographic film in a light-proof holder and is worn in areas where radiation might be encountered. The silver grains in the film will darken when exposed to radiation. The badges are processed after a predetermined time interval to determine the amount of radiation the wearer has been exposed to. 

One must monitor the exposure for each worker potentially involved with ionizing radiation. Visitor exposures are also important. OSHA and other organizations require such records. Typically, individuals wear film badges, pocket ionization detectors or other instruments while in areas where there are possible exposures. There are record for exposures. Employers must retain records for each person. 

A criticality accident was simulated using tee health physics research reactor (HPRR) to determine the response of teree Union Cartiide Nuclear Division health physics teams in analyzing e sed personnel (film badges) and area dosimeters to determine the magnitude of the accident and the radiation dose received Iqr personnel at the site of the accident. Since the recovery of e sed personnel may d nd on es ly medical treatment, it is essential that reliable estimates (d the dose received hr each victim be obtained as rapidly as possible. CmUnnons reanalyses it tee exposed dosimeters conibined with clinical procedures must, of course, be made to detemune the actual radiation dose accumulated by tee eq iosed individuals. 

Film Badge — A film badge is one of the earliest devices used to measure worker exposure to gamma radiation from radium and x-rays. Initially packets of dental x-ray film were worn and developed periodically to view the degree of darkening. Later special metal filters were used in an x-ray film holder, with an open window to provide unattenuated film area for high-energy beta measurement. With appro-... 

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