Posting specific tips in this forum might be unwise.
I am not a stock analyst, and I don't play one on the web. I'd hate to recommend something and have it go into the toilet. Plus, I don't always know what has been in a press-release or not. And investing in exploration stocks is a highly speculative affair.
But, I can make some quick suggestions. Start with North American producers, not explorers. Still risky, but less so, and fewer to choose from. Most of these are in Canada, where much of the exploration is also happening. Keep your eye on The Northern Miner (a subscription site, but plenty of tidbits on the free parts) and The Canadian Mining Journal for early news reports about exploration efforts and results, not only for Uranium but other metal news as well.