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Manhattan Project National Historical Park, Part I: B Reactor » 3_3_DSCF2155_v1

Vertical safety rod (VSR) motor switches at the B Reactor console.

Vertical safety rod (VSR) motor switches at the B Reactor console. The horizontal control rods (HCRs) were just that: control rods, whereas the VSRs were intended to provide shutdown automatically in a power outage, aided by gravity.

Vertical safety rod (VSR) motor switches at the B Reactor console.


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