Hi I've a voucher to travel to South Korea this April, I really need to know is it safe to travel there due to japan nuclear radiation?

I already make a study research, several article reviewed quarantine areas in japan just about 20km from exploded reactor. Somehow on other research I made it was safe to travel and stay on earth just by 80km from nuclear reactor. It could be worrying about rainy cloud was float everywhere, news said it was heading to Americas but no news about S.Korea. My concern S.Korea just next to Japan, I need further proved information about this radiation. I'm looking forward for great honeymoon without fears and tears. However I really worried to travel there but it is good voucher and i dont want to missed spring season in S.Korea.

Below is radiation cloud map found on web:

http://humansarefree.com/2011/03/japans-ra...-reach-usa.html



Anyone who knows about "is that S.Korea is a safe place to travel?", please advice me more. Any documented or links you may paste here and we may share to gain knowledge about japan radiation.