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Manhattan Project National Historical Park, Part I: B Reactor » 3_2_DSCF2133_v1

Control rod switches on B Reactor console.

Control rod adjustments on the B Reactor console. Rods 2, 4, 5, 6, 7, 8, and 9 were hydraulically operated and referred to as “shim” rods. They were adjusted infrequently, using the shim pumps as sources of hydraulic power. “A” rod and “B” rod were electrically controlled and used for fine power adjustment.

Control rod switches on B Reactor console.


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