RADIATION PROTECTION AND HEALTH EFFECTS ...

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and health problems of the ChNPP staff are not finished. A ... Ukraine. High ratio of neuropsychiatric disorders, diseases of cardiovascular, endocrine, digestive ...
RADIATION PROTECTION AND HEALTH EFFECTS OF THE CHERNOBYL NUCLEAR POWER PLANT STAFF DURING DECOMMISSIONING V. Bebeshkoa, D. Bazykaa, A. Nyagua, K. Loganovskya, I. Khomaziuka, L .Liashenkoa, V. Klymenkoa, A. Chumaka, I. Losa, V. Chumaka, L. Gaevajab (a) Research Center for Radiation Medicine, 53 Melnikov Str., 04050, Kiev, Ukraine. Fax 380-44-213 06 37 e-mail: [email protected] (b) ENERGOATOM National Energy Generating Company 9/11 Arsenalna Str., 01011, Kiev, Ukraine

The Chernobyl reactor IV is stopped but radiation protection and health problems of the ChNPP staff are not finished. A personnel of the “Shelter” object is a unique cohort of people because of character and conditions of their work. The personnel of the “Shelter” object is heterogeneous: it includes clean up workers of the Chernobyl NPP accident and also individuals who began their work within different terms upon finishing the period of the accident elimination including those people who were working only during last several years. Measures directed on health protection of the Chernobyl NPP (ChNPP) and the “Shelter” object personnel during the period of the ChNPP decommissioning and converting of the “Shelter” object into radioecologically safe object are becoming particularly actual. Risk factors for disruption of health condition of the “Shelter” object

personnel are: high psychological tension of work, shift regime, low ionizing radiation doses and other exogenous factors impact, and also potential danger of extrairradiation. Long-time monitoring of health of the “Shelter” object personnel is being conducted in the Research Centre for Radiation Medicine (RCRM), Academy of Medical Sciences of Ukraine. High ratio of neuropsychiatric disorders, diseases of cardiovascular, endocrine, digestive and respiratory system is revealed among personnel of the “Shelter” object. Progressive character of neuropsychiatric disorders and somatic pathology is observed in liquidatiors of 1986-1987, especially in those who worked for 3-5 years at the Chernobyl exclusion zone. Dynamics of the prevalence of basic classes of diseases is presented on fig. 1.

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Fig.1. Prevalence of diseases in personnel of exclusion zone, working from 1986 (per 1,000) Diseases of nervous system and sensitivity organs digestive system (19%), blood circulation system respiratory system (12%), mental disorders dominate in the structure of prevalence of diseases personnel of the exclusion zone (fig. 2).

(19%), (12%), (11%) among

Nervous 19%

Gastrointestinal 19%

Respiratory 12%

Other 27% Mental disorders 11%

Cardvascular 12%

Fig.2. Structure of diseases in personnel of exclusion zone, working from 1986 Prevalence of neuropsychiatric disorders among personnel working since 1986-1987 and irradiated in doses above 0.25 cSv is 80.5% while for the same contingency, but irradiated in doses below 0.25 cSv – 21.4% (p