Removal and repair of EBR-II primary sodium pump No. 1

Technical Report · Mon May 01 00:00:00 EDT 1972

DOI:https://doi.org/10.2172/4660202· OSTI ID:4660202

Cerutti, B. C.; Deegan, G. E.; Nulton, J. D.; Perry, W. H.; Seever, R. E.

Sodium pump No. 1 in the primary system of Experimental Breeder Reactor II (EBR-II) was removed because of periodic increases in its power consumption with no corresponding changes in primary sodium flow. Before removal, the pump had been operated satisfactorily for over 32,000 hr during an eight-year period. Disassembly of the pump revealed heavy oxide deposits on the pump shaft at and above the lower labyrinth. The labyrinth itself was badly corroded and and required replacement. The entire pump assembly was disassembled, cleaned, inspected, and re-assembled before re-installation in the primary tank. Some minor alterations were made to the pump assembly to improve its performance. The most significant alteration was the relocation o the sodium drain holes in the baffle sub-assembly. This change will direct the argon purge in a manner expected to reduce sodium oxide deposits on the pump shaft. Pump operation subsequent to repair and re-installation has been normal. Shaft torques and power consumption have returned to the levels experienced before pump difficulties developed.

• Research Organization: Argonne National Lab. (ANL), Argonne, IL (United States)
• Sponsoring Organization: US Atomic Energy Commission (AEC)
• DOE Contract Number: W-31-109-ENG-38
• NSA Number: NSA-26-052362
• OSTI ID: 4660202
• Report Number(s): ANL-7835
• Country of Publication: United States
• Language: English

Related Subjects

N78140* -Power Reactor Development-Cooling Systems
EBR-2 REACTOR
MAINTENANCE
PERFORMANCE
PRIMARY COOLANT CIRCUITS
PUMPS
REPAIR
PUMPS (LIQUID METAL)/removal of power reactor primary liquid sodium
procedures for
EXPERIMENTAL BREEDER REACTOR-II/pump for
removal and repair of primary liquid sodium
PUMPS (LIQUID METAL)/repair of power reactor primary liquid sodium