Automated radio alarm

Automated radio alarm is a radio station in Fallout 4. The signal leads to the Mass Fusion Containment Shed. The building is roughly south southeast of Radio Tower 3SM-U81.

Characteristics
The station goes on fast repeat with the message; "Reactor three in sub-level is malfunctioning. Radiation levels critical. Immediate service is required."

To get to the sub-level, go into the mag locked cage. Take the core out of the reactor and then turn around. Directly next to the loading ramp and behind the cart with two barrels on it there is a trap door that leads down into the Sub-level. Go down and explore. There will be a lunchbox on the desk and a circuit breaker on the reactor behind you. Flip the circuit breaker and the radio message will stop.