The purpose of this work was to study and identify the features of the formation of external radiation doses to personnel during the production of a new mixed uranium-plutonium nitride fuel, which surpasses MOX fuel in almost all thermal and physical characteristics, the production of which is currently being developed in Russia.
Quite a few works have been devoted to the radiation characteristics of this fuel. This paper presents the results of a radiation-hygienic study of the factors of external exposure of personnel at the workplaces of experimental facility carried out in 2018-2019. During the research, dosimetric and spectrometric measurements of operational quantities were carried out at personnel workplaces, as well as the measurement of individual dose equivalents for personnel, including doses to the skin, using individual dosimeters. It has been shown that the neutron component forms about 20 percent of the external dose. The annual equivalent dose of irradiation to the skin of the hands was 190 ± 50 mSv, and with an increase in production volumes, this value will be a factor limiting the operating time. It was also determined that due to the configuration of workplaces, the equivalent dose of radiation to the lower abdomen is about 60% higher than the equivalent dose at the chest level, which is important for individual monitoring of female personnel. The radiation doses to the skin of the face and the lens of the eye turned out to be insignificant due to the sufficient protection provided by the protective glass of the sealed boxes.
The results obtained give an idea of the current levels of personnel exposure during the development of new technologies and make it possible to identify the main factors of the harmful effects of external exposure to which the personnel will be exposed during the industrial implementation of the mastered technology.
|Country/Int. organization||Russian Federation|
|Affiliation/Organization||Burnasyan Federal Medical Biophysical Center of Federal Medical|
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