Open Access

Table 5

Summary of Halden LOCA tests IFA-650.9 and IFA-650.10 [135]. The indicated time and axial position of cladding burst refer tostart of blowdown and bottom end of the fuel pellet column.

Rod 9 Rod 10
Test rodlet characteristics
Cladding material Zr-4* Zr-4
Cladding oxide thickness [μm] 7-8 27-30
Fill gas pressure at 295 K [MPa] 4.0 4.0
Average fuel burnup [MWd/(kgU)] 90 61
Testing conditions
Rodlet LHGR [kW/m] 2.60 1.37
Heater LHGR (initial) [kW/m] 1.60 1.20
Blowdown duration [s] 35 71
Peak cladding temperature [K] 1475 1114
Cladding burst time [s] 133 249
Cladding burst position [mm] 80 240

DUPLEX cladding with outer liner of Zr-2.5 wt %Nb.

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