HOUSTON, June 3 (Reuters) - Royal Dutch Shell Plc
began planned maintenance on Wednesday on the coker at its
225,300 barrel-per-day (bpd) Norco, Louisiana, refinery, said
sources familiar with plant operations.
The 25,000-bpd coker will remain in operation at reduced
production levels while excess carbon is being removed from the
unit, the sources said.
(Reporting by Erwin Seba)