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KMID : 0364920100350020057
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Journal of Radiation Protection and Research
2010 Volume.35 No. 2 p.57 ~ p.62
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A Field Test Assessment on the Extremity Doses of Highly-Exposed Radiation Workers During Maintenance Periods at Nuclear Power Plants in Korea
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Kim Hee-Geun
Kong Tae-Young
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Abstract
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Maintenance on the water chamber of steam generator, the change of pressurizer heater, the removal of pressure tube feeder, and so on during outage in nuclear power plants (NPPs) has a likelihood of high radiation exposure to whole body of workers even short time period due to the high radiation exposure rates. In particular, it is expected that hands would receive the highest radiation exposure because of its contact with radiation materials. In this study, field tests on extremity dose assessment of radiation workers for contact works with high radiation exposure were conducted during the maintenance periods in Korean pressurized water reactors (PWRs) and pressurized heavy water reactors (PHWRs). In this field test, radiation workers were required to wear additional TLDs on the back and wrist, and an extremity dosimeter on fingers including a main TLD on the chest, while performing maintenance. As a result, it was found that the equivalent dose for fingers was distributed in the fixed range of deep dose and the equivalent dose for wrists.
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KEYWORD
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Contact work with high exposure, Shallow and deep dose, Extremity dosimeter, Steam generator maintenance work, Pressure tube removal work, High energy photon
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