Aqueous leaching of ADOPT and standard UO2 spent nuclear fuel under H2 atmosphere

被引：0
|
作者：
Alexandre Barreiro Fidalgo
Olivia Roth
Anders Puranen
Lena Z. Evins
Kastriot Spahiu
机构：
[1] Studsvik Nuclear AB,
[2] The Swedish Nuclear Fuel Waste Management Company (SKB),undefined
来源：
MRS Advances | 2020年 / 5卷
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摘要：
Leaching results to compare the dissolution behavior of a new type of fuel with additives (Advanced Doped Pellet Technology, ADOPT) with standard UO2 fuel are presented. Both fuels were irradiated in the same assembly of a commercial boiling water reactor to a local burnup of ~58 MWd/kgU. Fuel fragments are leached in simplified groundwater in two autoclaves under hydrogen atmosphere, representing conditions in a canister failure scenario resulting in water intrusion for a spent nuclear fuel repository. Preliminary results indicate the uranium concentration decreased to 3-4x10-8 M after 421 days, slightly above the solubility of amorphous UO2. Xe has been detected in the gas phase of both autoclaves. The concentration of Cs and I seems to gradually approach constant values, yet the redox sensitive elements continue to slowly increase with time. The preliminary data obtained supports the hypothesis that there is no major difference in leaching behavior between the two fuels.
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页码：167 / 175
页数：8
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