LONDON, Dec 9 (Reuters) -
* Royal Dutch Shell said it shut a unit at its Pernis oil
refinery
in the Netherlands after a crude spill on the morning of Dec. 8.
* Shell did not specify the unit concerned.
* Industry monitor Genscape detected decreased activity on
the
200,000 barrel per day (bpd) crude unit (CD6) on Monday, adding
that one of the furnace stacks of the cogeneration unit was
shut.
* The refinery is Europe's largest and has a capacity to
process
404,000 bpd of crude.
(Reporting by Ahmad Ghaddar; Editing by Edmund Blair)