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This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License
Article
Author(s)
Sunghyon Jang, Takashi Takata and Akira Yamguchi
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DOI:10.17265/1934-8975/2015.06.004
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ABSTRACT
A
water leakage on the surface of heat transfer tube in a steam generator of sodium-cooled fast reactor causes SWR (sodium-water reaction). The SWR
damages the leak surface and gives rise to the leak enlargement. Most of
initial leakage starts from micro leak (less than 0.5 g/s). However, the leak
rate increases more than two orders of magnitude and the resultant leak damages
surrounding heat transfer tubes and it brings secondary failure of the heat
transfer tube. Evaluation of the leak enlargement is necessary to assess the
leak rate increase, so that evaluate the possibility of secondary failure. In
this study, a simulant experiment, which uses neutralization reaction, is
proposed to reproduce the leak enlargement. To examine the feasibility of the
experiment, numerical simulations are carried out. From the result, a
funnel-shaped nozzle enlargement is observed and the shape similar to the shape
of the enlarged nozzle from the SWAT (sodium-water reaction test loop) experiment.
KEYWORDS
Sodium-cooled fast reactor, self-wastage phenomena, sodium-water reaction, simulant experiment, CFD (computational fluid dyanamics)
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