首页|Modeling and quantitative prediction of dynamic atmosphere-soil behaviors linked to tritium discharge
Modeling and quantitative prediction of dynamic atmosphere-soil behaviors linked to tritium discharge
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NETL
NSTL
Elsevier
Tritiated water vapor (HTO) is the dominant source among the radioactive airborne effluent from commercial nuclear power plants. Gas or liquid metal coolant is recognized to be widely used in the advanced nuclear energy systems and fusion reactor. Elemental tritium (HT) would be the dominant form regarding the environmental effluents of advanced nuclear energy systems under the oxygen-free environment. Additionally, tritium release amount would also be higher than current pressurized water reactor. A dynamic modeling scheme was proposed to simulate tritium migration and conversion behaviors in the atmosphere-soil compartments. Atmospheric tritium concentration level was predicted by hourly-resolution wind field data. With regard to HTO discharge source, HTO concentration level in soil moisture was evaluated with consideration of daily-resolution atmospheric HTO concentration data, daily-resolution precipitation and evapotranspiration data. With regard to HT discharge source, HT concentration in air-filled soil porosity, conversion product known as HTO concentration in air-filled and water-filled soil porosity was predicted from the viewpoint of time series. Influence of key parameters such as HT conversion rate and gaseous fraction of conversion product in the soil on HTO distribution was discussed at last. It was indicated that environmental factors such as wind field, conversion rate, precipitation and evapotranspiration rate, gaseous fraction have a significant influence on tritium distribution in atmosphere-soil compartment. Development of time-varying simulation method adopting the above dynamic environmental factors as input data is beneficial for achieving a refined environmental impact assessment.
TritiumAtmospheric dispersionSoil migration and conversionAdvanced nuclear energy systemsNUCLEAR-POWER-PLANTSENVIRONMENTAL TRITIUMMOLECULAR TRITIUMOXIDATIONDISPERSIONTRANSPORTGASHT
Nie, Baojie、Wu, Haoyang、Ran, Yiling、Wang, Dezhong
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Shanghai Jiao Tong University School of Mechanical Engineering
NETL
NSTL
Elsevier
