Condition; Environmental conditions; Heat flux measurement; Heat flux sensors; Mode of operations; Pressurised water reactor; Property; Reflux condensation; Reflux condensers; Steam generator tube; Nuclear and High Energy Physics; Materials Science (all); Nuclear Energy and Engineering; Safety, Risk, Reliability and Quality; Waste Management and Disposal; Mechanical Engineering; Nuclear Experiment
Abstract :
[en] In this paper we present the developments in heat flux measurements using gradient heat flux sensors (GHFS). The GHFS is a sensor made of artificially created material with anisotropic thermo-electrical properties. Its properties including small size, robustness and low response time make it a valuable addition for characterizing heat flux in space-limited geometries as well as harsh environmental conditions. This makes it ideal for investigation of reflux condensation in the steam generator tubes of a pressurized water reactor. The reflux condenser mode of operation during accident as well as maintenance conditions can provide a significant passive cooling, removing the residual decay heat from the reactor core, thus preventing or at least delaying potential core uncovery. With this novel implementation of GHFS deeper characterization of heat flux during reflux condensation was achieved.
Disciplines :
Physics
Author, co-author :
JANASZ, Filip ; University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Engineering (DoE) ; ETH Zürich, Zürich, Switzerland
Prasser, Horst-Michel; ETH Zürich, Zürich, Switzerland
Suckow, Detlef; Paul Scherrer Institut, Villigen PSI, Switzerland
Mityakov, Andrey; Peter the Great St. Petersburg Polytechnic University, Russian Federation
External co-authors :
yes
Language :
English
Title :
The use of a novel gradient heat flux sensor for characterization of reflux condensation
The authors would like to express their sincerest gratitude for to Dr. Terttaliisa Lind whose expertise and guidance greatly assisted the research and helped to improve this manuscript significantly. We are also grateful to Mr. Marton Szogradi for his assistance with conducting the experiments. We have to express our appreciation to the laboratory staff for helping to design and construct the experimental facility.
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