Effects of dissolved hydrogen on fuel crud deposition and subcooled nucleate boiling in PWR primary water at 328 °C

•Effects of dissolved hydrogen on crud deposition and boiling behavior are presented.•Boiling behavior on cladding tube is monitored using an acoustic emission technique.•There is no distinct difference in boiling signals with dissolved hydrogen.•The difference in the amount of crud deposition with...

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Bibliographic Details
Published in:Nuclear engineering and design 2019-04, Vol.345, p.85-93
Main Authors: Baek, Seung Heon, Shim, Hee-Sang, Kim, Jung Gu, Hur, Do Haeng
Format: Article
Language:English
Subjects:
Acoustic emission
Acoustic emission testing
Boiling
Cladding
Computer simulation
Crud
Deposition
Dissolved hydrogen
Emission analysis
Energy distribution
Fuel cladding
Morphology
Nickel
Nuclear energy
Nuclear fuels
Nucleate boiling
Pressurized water reactors
Sub-cooled nucleate boiling
Tubes
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Summary:•Effects of dissolved hydrogen on crud deposition and boiling behavior are presented.•Boiling behavior on cladding tube is monitored using an acoustic emission technique.•There is no distinct difference in boiling signals with dissolved hydrogen.•The difference in the amount of crud deposition with dissolved hydrogen is minor. This work aimed to evaluate the effects of dissolved hydrogen (DH) on the crud deposition and subcooled nucleate boiling (SNB) behavior of fuel cladding tubes in a simulated primary coolant of a pressurized water reactor at 328 °C and 13 MPa. The SNB characteristic occurring on the fuel cladding tubes was periodically observed using an acoustic emission method during the deposition tests. There was little difference in the energy distribution and hit number of the boiling acoustic signals at three difference DH concentrations ranging from 0 to 70 cm3/kg H2O. The difference in the amount of crud particles on the cladding tube at each DH condition was also minor. The effect of DH on crud deposition is discussed from the viewpoint of the SNB behavior, the solubility of Ni and Fe, and the change in the crud morphology.
ISSN:0029-5493
1872-759X
DOI:10.1016/j.nucengdes.2019.02.010