UO$sub 2$ FUEL ROD OPERATION WITH GROSS CENTRAL MELTING
EPT-12, a fuel assembly of four rods containing hollow UO/sub 2/ pellets clad in Zircaloy-2, is being irradiated in the GETR pressurized-water loop at extreme thermal conditions to produce gross central melting. The peak surface heat flux of the maximum power rod is 1.4 x 10/sup 6/ Btu/hr-ft/sup 2/. More than 70% of the UO/sup 2/ cross section is molten, and the thickness of the unmelted UO/sup 2/ rim adjacent to the cladding is approximates 40 mils. The assembly has attained a burnup of 5,300 Mwd/Te and 23 power cycles. Interim examination of the fuel assembly at the 5,300 Mwd/Te burnup level showed the rods to be identical to the pre-irradiation conditions. The irradiation results are tabulated along with those for earlier fuel assemblies. (D. L.C.)
- Research Organization:
- General Electric Co. Atomic Power Equipment Dept., San Jose, Calif.
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-17-036342
- OSTI ID:
- 4651057
- Report Number(s):
- CONF-39-89
- Country of Publication:
- United States
- Language:
- English
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