The Nuclear Option (Brotherhood of Steel)

The Nuclear Option is a quest and achievement/trophy in Fallout 4.

Quick walkthrough

 * 1) Talk to Elder Maxson
 * 2) Reach Institute reactor
 * 3) Use terminal to override Institute lockdown
 * 4) (Optional) Issue evacuation order
 * 5) Reach the reactor
 * 6) Plant fusion pulse charge inside reactor
 * 7) Talk to Elder Maxson
 * 8) Talk to Proctor Ingram
 * 9) Talk to Shaun
 * 10) Step into the relay
 * 11) Activate detonator
 * 12) Talk to Elder Maxson