Mass Fusion (quest)

Mass Fusion is a quest in Fallout 4.

Quick walkthrough

 * 1) Speak with Allie Filmore
 * 2) Relay to Mass Fusion building or Inform the Brotherhood
 * 3) Locate the Beryllium Agitator
 * 4) Retrieve the Executive Keycard
 * 5) Proceed to the reactor level
 * 6) (Optional) Restore power to the elevator
 * 7) Retrieve the Beryllium Agitator
 * 8) Unlock the reactor
 * 9) Take the Beryllium Agitator
 * 10) Eliminate reactor level security
 * 11) Exit Mass Fusion
 * 12) (Optional) Assist Institute forces in the lobby
 * 13) Speak with Allie Filmore

Behind the scenes
A beryllium initiator is used to generate neutron flux for starting nuclear fission reactions.

Bugs
Taking the elevator up makes the Sole Survivor sometimes appear between the building, the fall results in death.