Don't know what you have been taking, but despite being a hazard map, Reactor Hazard is smoother than most non-hazard maps. Only problem I had with it was a wave 1 hard freeze vs silver collectors, enemies spawning killed it.
My point is that it's still an issue enough map, especially as host, which I was. That was also like my third match, 2nd as host, since last reset, and a host migration. Even my Geth Pulse Rifle from the start was sounding like it was firing at half fire rate (audio switching between on and off). Map was still playable, but I knew if stuck around for one more match, there would be trouble.
You'll also have to just take my word for it, spotting frame issues on PS3 is my specialty. Even my fave map Condor has issues when facing in one direction (toward that one hack everyone hates at the bottom of the mountain trail).