An A320 departed with BSCU 1 MELed and on final approach at the destination the ECAM alerted BSCU2; Nose Wheel Steering and Antiskid INOP. A go around was executed; the ECAM actions completed and a normal landing completed followed by a tow to the gate.

Narrative

We departed with the BSCU 1 and the #1 fuel pump in the right tank deferred inoperative. All systems functioned normally for the flight. At about 500 FT AGL on an approach to Runway XX circle YY; we had multiple ECAM's indicating BSCU 1; BSCU 2; Nose Wheel Steering; and Anti Skid were inoperative. We executed a go around and took delaying vectors in order to secure the systems and properly prepare for landing. We determined we were going to have to land in that configuration and declared an emergency. After landing we planned to taxi clear of the runway on one of the high speed taxiways; shut down and get towed to the gate. We experienced moderate chop the entire time we were in the pattern through final landing. I felt there was no need to prepare the cabin so we informed the flight attendants and passengers that we would be making a normal landing and that emergency equipment would be following the plane as a precaution. The landing and roll out was uneventful. I noted the airspeed was 110 KIAS at 55 KTS ground speed during the roll out so I didn't need to apply brakes until about 30 KTS ground speed. As a result there was virtually no chance of skidding the tires. We cleared the runway; the Fire Chief cleared the underside of the plane and we were towed to the gate after 30 minute wait. The First Officer's assistance and professional work was invaluable in ensuring this was an uneventful emergency. It felt like a simple training simulator session.