Personnel dose assessment due to the normal operations with the artificial radiation sources according to the data from the unified system of individual dose control (USIDC)

Yu I Stepkin,M K Kuzmichev,O V Klepikov

doi:10.21514/1998-426x-2016-9-3-69-74

Abstract

The aim of the study was personnel dose assessment due to the normal operations with the artificial radiation sources. The article is based on the data from the Unified System of Individual Dose Control and Voronezh Region’s radiation-hygienic passport. The data from No.1-DOZ “Information on personnel exposure doses under normal operation of technogenic ionizing radiation sources” and over a period of 2006-2010 years were analyzed. In 2006-2015, the number of organizations, which submitted form No.1-DOZ “Information on personnel exposure doses under normal operation of technogenic ionizing radiation sources”, increased from 175 to 229. In amount of the radiation facilities, Novovoronezh Nuclear Power Plant is the first. Novovoronezh NPP has 1512 sources, which amounts to 51,9% from all sources in Voronezh Region (2915). Health care facilities have 869 radiation sources or 29,8%. X-ray machines are the main part of these sources (844 health care facilities or 97,1% of all medical sources). Industrial sources occupy third place with 305 facilities or 10,5% of all considered sources. In 2015, according to the data from Voronezh Region’s radiation-hygienic passport, the number of “A” group personnel were 4237, the number of “B” group personnel were 2341. The average individual dose for personnel was over the range from 0.66 to 2.02 mSv. Collective dose was from 4.16 to 11.79 man-sieverts per year. The increase of number of the radiation sources has attended with the decrease of individual and collective doses. The most likely it is related to using the modern facilities. In 2015, the maximum value of the average individual dose of “A” group personnel was registered in Voronezh regional hospital (6.17 mSv y–1). There are medical facilities with unsealed and sealed sources in this hospital. In 2006-2015, the average individual doses of personnel of all radiation facilities that use radiation sources in Voronezh region were significantly below the dose limits established by the Radiation Safety Standards NRB-99/2009.

Highlights

The article is based on the data from the Unified System of Individual Dose Control and Voronezh Region’s radiation-hygienic passport
The average individual dose for personnel was over the range from 0.66 to 2.02 mSv
The increase of number of the radiation sources has attended with the decrease of individual and collective doses

Summary

Sanitary and epidemiological surveillance

Рост использования техногенных источников ионизирующего излучения в атомной энергетике, промышленности, науке, медицине диктует необходимость проведения контроля доз облучения персонала и населения при их эксплуатации [1]. В настоящее время много работ посвящено оценке доз облучения медицинского персонала от ионизирующих источников излучения [4,5,6]. Облучение персонала техногенными источниками при их нормальной эксплуатации ограничивается путем обеспечения сохранности источников ионизирующего излучения, контроля технологических процессов и ограничения выброса (сброса) радионуклидов в окружающую среду, другими мероприятиями на стадии проектирования, эксплуатации и прекращения использования источников ионизирующего излучения. Цель исследования – оценка доз облучения персонала за счет нормальной эксплуатации техногенных источников ионизирующего излучения по данным Единой системы контроля и учета индивидуальных доз облучения граждан (ЕСКИД)

Материалы и методы

Результаты и обсуждение

группы А группы Б

Годы Years

Число совместителей персонала группы А