If you make a kill with the radiation grenade, you are not notified of a kill until you see the result/score screen after the match.

I played a match today where I threw a rad grenade on 2 POIs (both safes) and waited to see what happened.
No message was displayed, nor was a "kill sound" played.
At the end result screen, I saw I had a kill even though I had zero engagements and no guns, so it must've come from the rad grenade.

Is this intentional?