JFK Controller described a go around event on Runway 13L resulting in a potential conflict with an aircraft landing Runway 22L; the reporter electing to alter normal procedure/s because of concern for wake effects.

Narrative

A B777 went around after passing the numbers on Runway 13L. An A330 was close to landing Runway 22L. A third Air Carrier had departed Runway 13R. I initially wanted to give the B777 'Runway heading and climb to 2;000'. However; when I looked out the window at the B777's position relative to the A330; I had concerns that the B777 could possible overfly the A330 close to his touchdown and the wake could have pushed the A330 to the ground. Because of this thought; I made a last second decision to turn the B777 to a heading off 155 knowing the departure was ahead of him; not a heavy or B757. In an effort to keep the B777 from overflying the A330; I thought I had time to issue an altitude once I got the heading done. As this was going on; the third Air Carrier actually was turning to a heading of 170 and I told the departure local to make him a heading of 185. The B777 climbed way faster than I anticipated and was at 2;500 FT before I could issue an altitude. Furthermore; I believe [the] language barrier made things a little more complicated. In the end; everything worked out. Recommendation: I could have kept the B777 runway heading but the missed approach off Runway 13L does not protect aircraft landing 22L and in my opinion puts them at risk. I felt really uncomfortable about this situation but everyone said next time to keep the B777 runway heading and let him overfly the A330 as vertical is the only thing we really can do; although in my opinion; again; puts aircraft landing 22L at risk.