|
Vol.52, No.7, 493 ~ 503, 2014
|
| Title |
| Effect of Pre-hydriding on the Burst Behavior of the Zirconium Cladding under Loss-of-Coolant Accident Condition |
| 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 |
|
|
|
| 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) |
|
|
| Key Words |
| alloys, deformation, mechanical properties, hardness test, zirconium fuel cladding |
|
|
 |
|
