Allowable peak heat-up cladding temperature for spent fuel integrity during interim-dry storage
Allowable peak heat-up cladding temperature for spent fuel integrity during interim-dry storage
The hydrogen-charged specimens were heated to four peak temperatures of 250C, 300C, 350C, and 400C, and then cooled to room temperature at cooling rates of 0.3 C/min under three tensile hoop stresses of 80 MPa, 100 MPa, and 120 MPa. The cool-down specimens showed that high peak heatup temperature led to lower hydrogen content and that larger tensile hoop stress generated larger radial hydride fraction and consequently lower plastic elongation.