Title of article
ThO2 spent fuel assembly’s gamma dose rate dependency to burnup and cooling time
Author/Authors
Gholamzadeh, Zohreh Reactor and Nuclear Safety Research School - Nuclear Science and Technology Research Institute (NSTRI), Tehran, Iran , Gholshanian, Mohadeseh Reactor and Nuclear Safety Research School - Nuclear Science and Technology Research Institute (NSTRI), Tehran, Iran , Mirvakili, Mohammad Reactor and Nuclear Safety Research School - Nuclear Science and Technology Research Institute (NSTRI), Tehran, Iran
Pages
6
From page
43
To page
48
Abstract
Today thorium based fuels are being investigated as an alternative fuel technology. However, the majority of thorium fuel research studies are limited to reactor physics investigations, which leaves a gap for dose evaluation and shielding concerns of such spent fuels. The present work investigates thorium oxide fuel assemblies in Tehran research reactor. The fuel gamma dose rates are calculated at different burnups and cooling times. A comparison between the reactor routine fuel and the thorium oxide fuel is conducted to reveal the thorium-based fuel application shielding challenges. The obtained results showed that inverse to U3O8-Al routine fuel the spent ThO2 gamma dose rates are completely dependent to the burnup values. In addition, for transporting the spent ThO2 fuel with the routine transport casks there is needed to be waited for the higher cooling times than U3O8-Al transportation time or construction of thicker transport casks is needed for transportation of the thorium-based spent fuels at shorter times.
Keywords
Gamma dose rate , Thorium spent fuel , Computational calculations , MCNPX code
Journal title
Radiation Physics and Engineering
Serial Year
2020
Record number
2526142
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