THE ROLE OF THE FILM BADGE IN PERSONNEL MONITORING
Advantages of the film badge over the pocket dosimeter for personnel monitoring are enumerated and the operation of a large-scale commercial monitoring service utilizing a film dosimeter is described in detail. Defects of ionization chamber pocket dosimeters include sensitivity to mechanical shock, liability to electrical leakage, variation of sensitivity with radiation energy, narrow exposure range, and necessity of recalibration. The film badge is better adapted for the purposes of a large scale monitoring service. It is capable of recording doses due to x or gamma rays having effective energies from about 10 kev upward, BETA rays from 150 kev upward, and thermal neutrons, and also of indicating the type of radiation involved. It is also often possible to deduce from the film the manner in which exposure was received, In addition, the film is capable of recording a wide range of doses from less than 1/5 of the average weekly permissible level to very large overexposures, and it also provides a permanent record of the dose received. Its chief disadvantage is that it does not provide an immediate reading, as processing and evaluation inevitably introduce a delay in obtaining irformation about the dose received. Description is given of a film badge containing a filter system, which is used for accurate dosimetry. (P.C.H.)
- Research Organization:
- Radiological Protection Service, Belmont, Surrey, Eng.
- NSA Number:
- NSA-17-016432
- OSTI ID:
- 4754153
- Journal Information:
- Ann. Occupational Hyg., Journal Name: Ann. Occupational Hyg. Vol. Vol: 4
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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