Exelon Corp., the largest U.S. nuclear plant operator, would consider closing its Oyster Creek station before the plant's planned 2019 decommissioning, Chief Executive Officer Christopher Crane said. Exelon would accelerate plans to close Oyster Creek in Forked River, New Jersey, if it faced unexpected new capital costs at a time when depressed power prices and cheap renewable energy are squeezing nuclear generation margins, Crane said in an interview yesterday.