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Effect of of Pre-hydriding on the Burst Behavior of the Zirconium Cladding under Loss-of-Coolant Accident Condition

Authors
Lim, Do WanPark, Dong JunPark, Jeong YongJang, HoYoo, Jong SungMok, Yong KyoonSuh, Jung MinLee, Kang Moon
Issue Date
6월-2014
Publisher
KOREAN INST METALS MATERIALS
Keywords
alloys; deformation; mechanical properties; hardness test; zirconium fuel cladding
Citation
KOREAN JOURNAL OF METALS AND MATERIALS, v.52, no.7, pp.493 - 502
Indexed
SCIE
SCOPUS
KCI
Journal Title
KOREAN JOURNAL OF METALS AND MATERIALS
Volume
52
Number
7
Start Page
493
End Page
502
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/98351
DOI
10.3365/KJMM.2014.52.7.493
ISSN
1738-8228
Abstract
To investigate the effects of hydrogen on the rupture behavior and mechanical property of ballooned-zirconium cladding after a loss-of-coolant accident, simulated loss-of-coolant-accident tests were carried out using pressurized-zirconium-tube samples with and without hydrogen pre-charging. A pre-hydrided cladding sample showed lower deformation in the ballooned area and lower rupture temperature than the as-received cladding sample. Ballooned cladding without hydrogen charging showed no significant difference in mechanical property, in spite of a wide range of values for circumferential strain and of a different balloon shape caused by a different heating rate. Pre-hydrided cladding, however, showed an increase in maximum load with increasing heating-rate. The strong relationship between hydrogen content and burst behavior during the loss-of-coolant accident was analyzed and the mechanism by which hydrogen hardens zirconium alloy was explained.
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