VAPORISATION RATES OF CsOH AND CsI IN CONDITIONS SIMULATING A SEVERE NUCLEAR ACCIDENT
| Autor: | Kari E. J. Lehtinen, Riitta Zilliacus, Jorma Jokiniemi, Juan Enriquez, Ari Auvinen |
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| Rok vydání: | 2000 |
| Předmět: |
Fluid Flow and Transfer Processes
Atmospheric Science Nuclear fission product Environmental Engineering Radioactive tracer Chemistry Mechanical Engineering Analytical chemistry chemistry.chemical_element Germanium Pollution Sherwood number Aerosol law.invention Atmosphere law Fluent Ambient pressure Nuclear chemistry |
| Zdroj: | Auvinen, A, Lehtinen, K, Enriques, J, Jokiniemi, J & Zilliacus, R 2000, ' Vaporisation rates of CsOH and CsI in conditions simulating a severe nuclear accident ', Journal of Aerosol Science, vol. 31, no. 9, pp. 1029-1043 . https://doi.org/10.1016/S0021-8502(00)00027-6 |
| ISSN: | 0021-8502 |
| Popis: | The vaporisation rates of volatile fission product compounds are critical parameters for modelling aerosol formation following a severe nuclear accident. The vaporisation of CsOH and CsI was studied in a pure steam atmosphere at ambient pressure (85– 89 kPa ) by increasing the temperature of the flow furnace up to 1000°C. For this purpose, samples were doped with a small amount of radioactive tracer. The vaporisation rate was then determined from the decrease in sample activity with time, using a germanium gamma detector placed outside the furnace. Calculated vaporisation rates obtained by solving complete velocity, temperature and vapour concentration profiles surrounding the sample with FLUENT CFD-software, were in reasonable agreement with the data. A simple engineering calculation agrees almost perfectly with the FLUENT results, if a constant value, Sh≈8, for the Sherwood number is used. |
| Databáze: | OpenAIRE |
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