High-resolution boron dilution measurements using laser induced fluorescence (LIF)

The application of the laser induced fluorescence technique to the study of liquid mixing in the downcomer of a pressurized water reactor is presented. The scenario is that of a boron dilution event, in which a deborated slug is set in motion by the actuation of a reactor coolant pump. A separate ef...

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Bibliographic Details
Published in:Nuclear engineering and design 2000, Vol.195 (1), p.13-25
Main Authors: Gavelli, Filippo, Kiger, Kenneth
Format: Article
Language:English
Subjects:
Applied sciences
Boron
Coolants
Energy
Energy. Thermal use of fuels
Exact sciences and technology
Fission nuclear power plants
Fluorescence
Installations for energy generation and conversion: thermal and electrical energy
Laser beam effects
Pumps
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Summary:The application of the laser induced fluorescence technique to the study of liquid mixing in the downcomer of a pressurized water reactor is presented. The scenario is that of a boron dilution event, in which a deborated slug is set in motion by the actuation of a reactor coolant pump. A separate effects test facility, built with transparent plexiglas, is used to conduct optical measurements of the slug mixing along its path to the core. The optical assembly is described and the conditions for the implementation of laser induced fluorescence as a quantitative measurement technique are discussed. Results from a slug injection experiment are shown which demonstrate the high-resolution capabilities of this procedure as applied to the study of liquid mixing in the complex geometry of a reactor vessel downcomer.
ISSN:0029-5493
1872-759X
DOI:10.1016/S0029-5493(99)00201-0