Measurement of the gas velocity in a water-air mixture in crocus by neutron noise technique
Paper in proceeding, 2019

© 2019 American Nuclear Society. All rights reserved. The possibility to measure the gas phase velocity in a two-component mixture with neutron noise techniques is demonstrated in the zero-power reactor CROCUS of the Ecole Polytechnique Federale de Lausanne. It is the first step toward the experimental validation of a theoretical method aiming at the reconstruction of the void profile in a BWR channel. For this experiment, a channel is installed in the water reflector of CROCUS and two-component mixtures are generated inside the channel through injection of air at various flow rates. The signal fluctuations of two neutron detectors located at different elevations next to the channel are recorded and their Cross Power Spectral Density analyzed with various techniques to determine the transit time of the gas phase and its velocity. Experimental results are compared with predictions obtained with the TRACE thermal-hydraulic code. Results disagree in their magnitudes but the evolution of the gas velocity with the air injection rate are similar.

Neutron noise measurement

Two-component flow

Gas velocity measurement

Author

Mathieu Hursin

Paul Scherrer Institut

Swiss Federal Institute of Technology in Lausanne (EPFL)

Oskari Pakari

Swiss Federal Institute of Technology in Lausanne (EPFL)

Gregory Perret

Paul Scherrer Institut

Pavel Frajtag

Swiss Federal Institute of Technology in Lausanne (EPFL)

Vincent Lamirand

Swiss Federal Institute of Technology in Lausanne (EPFL)

Paul Scherrer Institut

Imre Pazsit

Chalmers, Physics, Subatomic and Plasma Physics

Other publications Research

Victor Dykin

Chalmers, Physics, Subatomic and Plasma Physics

Other publications Research

Gábor Pór

Budapest University of Technology and Economics

Andreas Pautz

Swiss Federal Institute of Technology in Lausanne (EPFL)

Paul Scherrer Institut

International Conference on Mathematics and Computational Methods Applied to Nuclear Science and Engineering, M and C 2019

2696-2703

2019 International Conference on Mathematics and Computational Methods Applied to Nuclear Science and Engineering, M and C 2019
Portland, USA,

Subject Categories

Energy Engineering

Other Physics Topics

Fluid Mechanics and Acoustics

More information

Latest update

1/3/2024 9

Feedback and support

If you have questions, need help, find a bug or just want to give us feedback you may use this form, or contact us per e-mail research.lib@chalmers.se.

About

Research.chalmers.se contains research information from Chalmers University of Technology, Sweden. It includes information on projects, publications, research funders and collaborations.

More about coverage period and what is publicly available

Privacy and cookies

Accessibility

Citation Style Language
citeproc-js (Frank Bennett)

Links

Chalmers Library
Chalmers Research
Chalmers Student Theses

Chalmers University of Technology

SE-412 96 GOTHENBURG, SWEDEN
PHONE: +46 (0)31-772 10 00
WWW.CHALMERS.SE