1. I wouldn't give a shit;
2. Just as much as I don't give a shit about the radio-active waste that's in my smoke-alarm, hanging above my head;
3. Just as much as I don't give a flying fuck about all the Wi-Fi+cellular+radio+light radiation in my area combined (a cellular tower just 200m away from my bed);
4. Just as much as that I don't give a flying fsck about smoking.
You see; radiation is nothing but electromagnetic waves. I'm heavily bombarded by it 24/7. There's probably a download of Adobe Photoshop CS5 flying through my brain as I'm typing this.
I am getting cancer on a daily basis, it's just that my immune system kills my damaged cells. The brain development damage resulting from the current Chernobyl levels of radiation, is less than when a teenager starts drinkling alcohol in the weekends. I am not shitting you. And currently; that "OMG ABOVE ADVICED LEVELS SOMETIMES"-radiation is far less likely to kill my immune system. It's just that there are more mutations and one of them could, might, somehow trick my immune system into believing that it's healthy. But with that amount of radiation; chances are higher you'll get hit by a car before you die.
Yes, UN is certainly a source which you can trust, they'd never say bullshit, would they?