Document Type : Research paper
Authors
Reactor and Nuclear safety Research School, Nuclear Science and Technology Research Institute (NSTRI), Tehran, Iran
Abstract
In this study, radiation exposure of emergency personnel during the severe radiological accident of Tehran research reactor was investigated. Projected dose is the sum of the effective dose from external exposure and the committed effective dose from the inhaled radionuclides. In this work, the projected Total Effective Dose Equivalent (TEDE), acute dose estimates for vital organs, and thyroid Committed Dose Equivalent (CDE) in the early phase of a radiological incident were investigated. The comparison between the dose calculation results with protective action guides dose limits indicated the protective actions of the emergency personnel to reduce the radiation hazards. As dose calculation results, the Total Effective Dose Equivalent (TEDE) projected dose value up to 3 min of exposure duration time is higher than the protective action guides dose limit (1 rem), so sheltering-in-place or evacuation should be initiated. Also, the thyroid dose value up to 15 min of exposure time is above the protective action guide limit (5 rem), so Iodine prophylaxis actions should be imposed.
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