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Abstract

The STORM project investigates the deposition and resuspension of representative (SnO(2), CsOH) aerosols in selected components (eg pipes, bends, steam generator) under typical accident conditions of a reactor. To characterize the phenomena of deposition and resuspension the aerosol deposit has to be well observed without disturbing the process under investigation. To fulfill this objective the attenuation of gamma radiation (60keV Americium 241) by the formation of a deposit in a test pipe has been measured. The Americium source has been mounted in a frame which can be moved in the x and y direction (stepwidth 0.2 mm) and rotated around the pipe (step width 0.1 degree). The measurement object can be scanned over a certain range. The frame can house objects of up to 500 mm in diameter. Windows of 0.7 mm thickness have been made in the testpipe surface. A deposit resolution of 1 mg /cm{2} is achieved. The instrument, the calibration measurements with SnO(2) and CsOH and its application during the STORM experiments are presented. The use of an energy selective detector to additionally characterize the deposit composition are discussed.

Additional information

Authors: HUMMEL R, JRC Ispra (IT);HAUTOJAERVI A, JRC Ispra (IT);KRASENBRINK A, JRC Ispra (IT);DE SANTI G, JRC Ispra (IT);VALISI M, ENEL-DSR/VDN, Milano (IT)
Bibliographic Reference: Paper presented: European Aerosol Conference 1996, Delft (NL) September 9-12, 1996
Availability: Available from (1) as Paper EN 39842 ORA
Record Number: 199611130 / Last updated on: 1996-10-28
Category: PUBLICATION
Original language: en
Available languages: en
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