| Title |
Effect of Pre-hydriding on the Burst Behavior of the Zirconium Cladding under Loss-of-Coolant Accident Condition |
| Authors |
임도완(Do Wan Lim); 박동준(Dong Jun Park); 박정용(Jeong Yong Park); 장호(Ho Jang); 유종성(Jong Sung Yoo); 목용균(Yong Kyoon Mok); 서정민(Jung Min Suh); 이강문(Kang Moon Lee) |
| DOI |
https://doi.org/10.3365/KJMM.2014.52.7.493 |
| ISSN |
1738-8228(ISSN), 2288-8241(eISSN) |
| Keywords |
alloys; deformation; mechanical properties; hardness test; zirconium fuel cladding |
| 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 prehydrided 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. †(Received August 2, 2013) |