EBR-II environmental instrumented subassembly XX08: engineering and assembly

Technical Report · Mon May 01 04:00:00 EDT 1978

DOI:https://doi.org/10.2172/6591632· OSTI ID:6591632

Smaardyk, A. ^[1]; Filewicz, E. C. ^[1]; Longnecker, A. A. ^[1]; Poloncsik, J. ^[1]; Tokar, J. V. ^[1]; Walker, D. E. ^[1]; Wendte, J. C. ^[1]

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1. Argonne National Laboratory (ANL), Argonne, IL (United States)

Subassembly XX08 is a fueled and instrumented subassembly designed primarily for an ongoing program to investigate the thermal-hydraulic core environment within EBR-II under normal and off-normal plant operating conditions. The Mark-II fuel is expected to provide XX08 with an irradiation lifetime three times as great as that attained with XX07, i.e., 9 versus 2.9 at. percent burnup. A burnup of 9 at. percent is equivalent to about 29,000 MWt days of EBR-II reactor operation, which corresponds to 11 reactor runs at 2700 MWd per run. Instrumentation within XX08 includes 16 spacer-wire coolant thermocouples with junctions at various axial and radial locations within the fuel-element bundle, six top-of-core-elevation fuel-pin thermocouples, two subassembly-outlet-coolant thermocouples, two permanent-magnet flowmeters for measuring subassembly flow, and two rhodium self-powered detectors for neutron-flux determinations. Signals from the instrumentation are processed and recorded using the EBR-II digital data-acquisition system (DAS). This report provides detailed information on engineering, design, and assembly of XX08.

• Research Organization: Argonne National Lab., IL (USA)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 6591632
• Report Number(s): ANL-78-9
• Country of Publication: United States
• Language: English

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