CsOH, CsI and Ag aerosol behavior in LWR containment conditions
The aim of this study is to validate the aerosol models used for containment analyses during severe core melt accidents. In this test series hygroscopic CsI, CsOH and inert Ag aerosol behavior in different temperatures and relative humidities has been studied in well instrumented and controlled vessel (volume - 2 cubic meter). In earlier test series hygroscopic NaOH (similar behavior as CsOH) was used as aerosol material. Test series consists of 12 tests. Spherical aerosol particles were generated from water solutions of aerosol material using ultrasonic aerosol generators. CsOH and CsI were used as hygroscopic aerosol materials. Ag was used as inert aerosol material. Spherical Ag particles were made from silver nitrate+water solution droplets utilizing Lindberg tube furnace at 900 C. Aerosol number and mass concentration was measured continuously during the tests using Condensation Nucleus Counter and Tapered Element Oscillating Microbalance. In Ag+CsOH tests aerosol size distribution in the test conditions was measured using Berner low pressure impactors inside the vessel. Impactor samples were analyzed chemically. Experimental results of the CsOH, CsI and Ag aerosol behavior in LWR containment conditions will be presented. Data report of the tests will contain also comparison of the experimental results with the theoretical results calculated with the NAUAHYGROS, CONTAIN and MELCOR computer codes.
- OSTI ID:
- 166522
- Report Number(s):
- CONF-9510126--
- Country of Publication:
- United States
- Language:
- English
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