Radiological Concentration Distribution of <sup>131</sup>I, <sup>132</sup>I, <sup>133</sup>I, <sup>134</sup>I, and <sup>135</sup>I Due to a Hypothetical Accident of TRIGA Mark-II Research Reactor

Abstract

The present work gives a methodology for assessing radiological concentration of <sup>131</sup>I, <sup>132</sup>I, <sup>133</sup>I, <sup>134</sup>I, and <sup>135</sup>I due to a hypothetical accident of TRIGA Mark-II research Reactor at AERE, Savar, Bangladesh. The concentrations were estimated through different pathways like ingestion of vegetation, milk, and meat from air and ground deposition. The maximum air concentrations for all 16 directions were found at 110 m distance from the core of the reactor and it was found to be highest in the southern (S) direction. The maximum ground concentration occurred immediately just after the accident in different directions. In all pathways, the most concentration was found to be in S-direction. The concentrations in vegetation of <sup>131</sup>I, <sup>133</sup>I, <sup>135</sup>I were significant, while no concentrations of 132I and 134I were observed. The concentration in vegetation for <sup>131</sup>I was found to be highest than all other isotopes of iodine. The concentrations of <sup>133</sup>I were found to be higher and concentrations of <sup>134</sup>I were observed to be lower in both milk and meat compared to other radio isotopes of iodine. In the case of a radiological accident, the results of the present study will be a valuable guide for adopting radiological safety measures for radiation protection against the ingestion of vegetables, milk and meat from around the research reactor at AERE, Savar, Bangladesh

Numerical Dose Assessment and Short-term Radioactivity Impact on Foodstuff for Continuous Release from of TRIGA Mark II Research Reactor

“…Hikaru et al [7] conducted a study on the radiological aspects of fallout from the Fukushima Daiichi nuclear power plant accident by measuring radiation in the Chiba metropolitan area from March 15 th , 2011. Malek, et al [8] conducted another study to evaluate the radiological doses resulting from the deposition of Research Article 131 I, 132 I, 133 I, 134 I, and 135 I on the ground, vegetation, milk, and meat in the event of a hypothetical accident involving a TRIGA research reactor. The study found that 131 I contributes the most to the dose in vegetation compared to all other radionuclides.…”

“…We calculated the airborne fraction of these isotopes remaining to be released into the atmosphere from the 3MW(t) research reactor TRIGA Mark-II, which will be operate for 10 days. Our results were compared with some findings from the bibliography [8][9]. To elaborate on this work, we need to specify certain parameters in advance.…”

“…displays the average wind speeds measured hourly at a height of 10 m for various directions. The mean activity concentration and dose calculations were evaluated based on a release height stack of approximately 32.36 m and the dominant stability class B (unstable)[8].…”