Re: Career != Lifetime
phuzz is correct, as I know from personal experience.
Due to a fusion reactor test that went "too well" despite being a nearly dry run at the smallest scale the lab could manage, I got some tens (maybe even 50-100) of milliSieverts in perhaps 20 seconds.
Mostly high energy neutrons but also plenty of low energy gammas from the power source, and some high energy ones from neutron capture events.
I was very sick for a few weeks, and maybe anecdotal, but have had to have two cancers cut out of me in a couple of years since. I'd not recommend the experience even to an enemy (if I had any).
The space dose intensity is far less than what I god, but it's no joke. A few dead cells here and there, the body tosses them out with the other garbage. A significant number, all sorts of nasty things happen including auto-immune response to the dead cells...weeks of puking and passing out the other end ain't fun at all. Honest.
Biting the hand that feeds IT
