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A major programme of integral tests has been completed in the Falcon facility at Winfrith. This two-year programme was designed to study the transport of fission product vapours and aerosols under severe accident conditions. Simulant or trace-irradiated fuel samples were heated up to 2000 K together with bulk-reactor materials, and the transport of the released fission products was followed through a pathway that simulated to some degree the upper plenum, hot-leg structures and the containment. Various analytical techniques were used to provide information on the chemical species and physical forms of the release. Mass spectrometry was developed to sample the high-temperature vapours at ambient pressure and determine their chemical forms, on-line gamma-ray spectroscopy was used to distinguish between gas-borne and deposited radionuclides, and speciation samplers (Maypacks) were used to follow the chemical behaviour of iodine within the containment vessel as a function of time. The experiments were designed and analysed with the assistance of modelling specialists to maximise the benefit of this work for the assessment and development of primary circuit and containment codes. This volume summarises the Falcon project and describes the integral and the separate-effects experiments carried out.

Additional information

Authors: BEARD A M ET AL., AEA Technology, Winfrith Chemistry Division, Dorchester (GB);OGDEN J S, University of Southampton, Department of Chemistry (GB);DEANE A M ET AL., AEA Technology, Harwell Laboratory, Didcot, Oxon. (GB);ASHTON N J ET AL., AEA Safety and Reliability, Culcheth, Warrington (GB);BUCKLE E R, University of Sheffield, Division of Metallurgy, School of Materials (GB);SABATHIER F, CEA, CEN Cadarache, Saint-Paul-lez-Durance (FR)
Bibliographic Reference: EUR 14005/1 EN (1992) 306 pp., FS, ECU 23.75
Availability: (2)
ISBN: ISBN 92-826-3265-2
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