The 5e book Run and Gun covers the basics of Space, and some of the hazards there...
Street Grimoire has some info on radiation damage..
I know there was a blurb somewhere about environmental radiation, but I can't find it right now in my PDF collection.
If a space suit fails.... well... lets just say its not pretty.
If its just the radiation shielding, you cook to death (it just might take days to weeks as the radiation kills off cells, one cell at a time.)
If its a pin hole in the suit, you suffocate in seconds, as all the air escapes through the hole at the speed of sound, much means given the volume of a space suit, it would take less time for the air to escape, then it would take you draw a single breath.... and the air would even be ripped out of your lungs, and even through your skin during such a breech (if in a vacuum such as space, or a station that is not pressurized).
Its the vacuum that makes space dangerous, as it changes many of the factors you think of here on earth... with no outside pressure to keep gasses in place, they move to fill the void (space) at the speed of sound, which means even a tiny pinprick in a suit can lead to a rapid loss of pressure, and without pressure, you can not breathe (the expansion and contraction of your chest cavity, which creates a vacuum, and draws air into your lungs. but, when dealing with vacuum pressures, the larger wins out, which would be space).
I would look for environmental hazards in the books, you might find the radiation entry, I know there was one.. I just can't remember which book.