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Manhattan Project National Historical Park, Part I: B Reactor » 7_1_DSCF2280_v1

The "Beckman Room" in the basement of B Reactor.

The “Beckman Room” in the basement of B Reactor. This is where ion chambers were inserted against the graphite pile to measure neutron flux (equivalently, reactor power level). The weak current signals were read by Beckman electrometers and relayed to the control room.

The “Beckman Room” in the basement of B Reactor.


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