Creator: Gillette, J. L.; Ploncsik, J.; Smaardyk, A.; Walker, D. E.; Filewicz, E. C.; Longnecker, A. A. et al.
Description: The EBR-II environmental instrumented subassembly (EISA), or Test XX07, was designed, fabricated, and irradiated to provide in-core measurements of irradiation conditions. This subassembly contained 57 elements with uranium metal-5 wt.% fissium fuel and four non-fueled elements. It was instrumented with two permanent-magnet flowmeters, 13 coolant thermocouples at various axial and radial locations, 10fuel-centerline thermocouples, and two self-powered detectors. The subassembly was irradiated in EBR-II for about 11,600 MWd (-186 days), reaching a peak burnup of about 2.9 at.% During its residence in the reactor, XX07 provided in-core measurements of flow, temperature and flux levels under both steady-state and dynamic conditions.
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