A CRJ-200 Captain reported a flap failure during a Tower directed go-around. The after takeoff checklist items were not completed and because the flaps were at 30 and the gear not retracted; the flight landed with 2;000 LBS of fuel.

Narrative

After initiating a go-around due to a General Aviation aircraft that did not clear the runway as instructed; we experienced a flap failure at 30 degrees while configuring for the second approach. We performed a go-around and declared an emergency. We determined that our destination airport runway was sufficient for landing per the QRH and dispatch; and returned for landing. Upon landing we had 2000 LBS of FOB. During the go-around; after performing the QRH and after takeoff checklist; the gear was inadvertently left down. Factors contributing to this were the absence of the flap retraction call due to failure; absence of the positive rate call as no climb was required; the fact that the flaps failed at a high drag position; omitting items per SOP on the After Takeoff Checklist for a go around; landing distance/diversion considerations; and low fuel. I would suggest verbally announcing call outs in the profiles even if they do not apply in an attempt to keep things standard; not rushing through checklists; and looking at every item on the checklist even if you think it does not apply.