engleski

Estimation of cytogenetic risk in the process of non-destructive testing of welds.

In the process of non-destructive testing of welds the workers are very often exposed to both X-ray or gamma radiation and ultrasound, in dependence with the requirements of the test method applied. Despite training courses and awareness of workers that protection is necessary in the USA has been developed a special audit program for assuring radiation safety during radiographic examination operations. Such program can be actually implanted in every company which is licensed for weld testing activities. The adventage of this program is also that the number of radiographic inspections is controlled in order to prevent possibility of accidental exposures as the results of fatigue. The estimation of dose based on chromosomal aberration analysis is a reliable and generally accepted method, and it indicates genome damages earlier than any other method used in medicine. However, according to available literature data it could be seen that in the cases of overexposure of radiographers detected by film dosimeter only skin changes are quite often diagnosed even without haematological analysis. Since no biodosimetrical study so far provides data on genome damages of radiographers caused by combined exposure to gamma irradiation and ultrasound the aim of this study was to compare the effects of the exposure to ionising radiation alone and combined with application of ultrasound during the process of weld testing.

cytogenetic risk; non-destructive testing of welds; gamma irradiation; ultrasound; occupationally exposure

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