MEM Controller described a potential conflict event when an air carrier on approach for Runway 27 elected to go-around with traffic inbound on a visual approach to Runway 18R. The reporter citing the CRDA procedure does not provide any protection from Runway 27 go-around events; suggesting the CRDA procedure be terminated all together.

Narrative

ACR X was on a visual approach to Runway 27. He was too high and we were landing that runway simultaneously with Runways 18L/18R. The wind was 140@11. ACR X advised the LC2 Controller that he was going around. The LC2 Controller assigned him runway heading and 3000 which was suggested to him by the FLM. ACR Y; a CRJ2; was on a visual approach to Runway 18R. The LC2 Controller shouted that he had a go-around Runway 27; so I issued traffic to ACR Y. He asked if it was a A319 because he was 'climbing like a rock'. ACR Y reported the traffic in sight; I also had both aircraft in sight. ACR Y landed without incident. I report this because we have been required to use CRDA to Runways 18L or 18C; and Runway 27. CRDA does absolutely nothing to protect the Runway 18R aircraft from a Runway 27 go around. The standard line we have been given is that go arounds aren't a problem. If; by chance; ACR Y had been closer to the airport when ACR X had gone around; there would have been a problem. We also routinely use CRDA with just such a quartering tailwind. I also believe that the Runway 27 glide slope was OTS at this time; but am not positive. However; we are not limited to using CRDA when such equipment is OTS. All of these factors could lead to a potential disaster. I recommend terminating the use of CRDA all together. That would be the safest solution. In the likely event that will never happen; I would recommend being a lot more restrictive with it. Don't allow it's use with any kind of tailwind component. Don't allow it's use with a crosswind above 10 KTS. Don't allow it's use if any portion of the ILS or PAPIs is OTS; and don't allow any jets to use it; just turbo props and smaller aircraft. When I say 'don't allow it's use' I'm meaning don't land Runway 27 when these conditions exist or with these aircraft. We have the capability for simultaneous ILS's to Runways 18L/18R; it would see we could get almost as many arrivals into the airport by using this tool instead of CRDA while greatly reducing the risk factor.