Rift Quest:Salvage Operation  

When you arrive at the pump there will also be a letter pinned to the wall by the pump. This is from Kira Thanos and starts the quest, A Mysterious Letter.

When you disable the pump a cylyndrical tank device appears. Interact with it to collect the Necrotech Generator. There will be a big guy that appears and runs over. Don't worry, it is scripted and he does not attack you.