CHROMOSOMAL DOSIMETRY FOR SOME GROUPS OF EVACUEES FROM PRYPIAT AND UKRAINIAN LIQUIDATORS AT CHERNOBYL

Lymphocytes from some evacuees from Prypiat and clean-up workers I:liq uidators) have been studied for chromosomal aberrations. When dicentri c yields from subjects are pooled in various ways, by date of evacuati on: date of working at Chernobyl or delay in blood sampling, the resul tant mean dose estimates are higher than have been generally assumed f rom dose reconstructions for Prypiat citizens or personal dosemeters w orn by liquidators. Some of this difference may be due to the selectio n of subjects for study. However, dicentrics in one cohort of randomly selected evacuees, sampled very promptly, indicated a mean dose of si milar to 300 mGy which is significantly in excess of mean dose reconst ructions of similar to 10-20 mSv.