@kaia In the pictured layout, the toilet only really fits in the middle - it'd block a bed if it was in the corner.

There's a screen that wraps around, so I don't see a problem.

Still, that doesn't look very bomb resistant - but it'll be useful for waiting out the half-lifes of the hottest isotopes in the fallout for several days - then you'll be able to safely exit.

I would go with freedom-respecting GNU/Cave, deep inside the earth with thick rock for shielding instead of such proprietary room myself.