Improving the safety of one typical research reactor with regarding gamma radiation hazards of uncovered core

، صفحه 0-0 (1)
عنوان دوره: اولین دوره بین المللی و بیست و هشتمین دوره ملی (1400)
Establishing reactor coolant is important in shutdown conditions. Core uncovering accident analysis is essentail for reactor safety considering recommendations after the Fukushima Daiichi disaster. Plate-type research reactors are one of the main groups of research reactors. In this study, Tehran research reactor as an open pool and medium power reactor is investigated which following 30 days operation in 5 MW and 24 h cooling after shutdown. The gamma dose is calculated using MCNPX and ORIGEN codes as there is no water in beam tubes and pool. The amount of dose is highly depends on gamma source and other accident conditions. The dose rate is up to 80 Svh-1 for some under containment areas which is considerable and exceeding from allowable exposure limits. The reactor is equipped with an emergency make-up system to prohibit individuals’ exposure and core damage during the loss of coolant accident.
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