Any eagle-eyed explorers will likely have noticed you need a signal redirector in Atomfall's starting bunker if you want to open those sealed doors. There's a junction just outside where you leave the scientist and upon closer examination, it says you need this particular device to interact with it. Sadly, the signal redirector requires you to progress a bit in the game first, so this is a case of coming back later.
Both ways of getting the signal redirector are located in the Skethermoor region, so you'll want to head to Wyndham Village first, then east out of the town. It's also advisable you buddy up to Captain Sims first so the Protocol Soldiers there don't shoot you on sight—I'll go into that below. Here's how to get a signal redirector in Atomfall.
