DIARY-U.S. refinery operations-Total Port Arthur refinery reformer restart on hold

July 18 (Reuters) - The following is a list of refinery incidents reported in the United States on July 16-17: * Shell says maintenance complete at Martinez, Calif. refinery * Phillips 66 reports power restored after brief outage at Sweeny refinery * Citgo's Corpus Christi, Texas gasoline unit operating normally: sources * PES shuts boiler, limits production at Phila. refinery - source