* Shell says flaring from Bukom site has subsided
* A cracker may have shut on an outage - trade (Adds comments from traders)
By Seng Li Peng and Jessica Jaganathan
SINGAPORE/OSLO, Sept 27 (Reuters) - An incident at RoyalDutch Shell's manufacturing site at Pulau Bukom inSingapore on Tuesday resulted in flaring with dark smoke at oneunit but it has since subsided, a spokeswoman said.
She said the affected unit had been stabilised following the"operational upset", no one had been hurt and the rest of thesite was operating normally. Shell declined to give detailsabout the unit in question, or whether it had been shut down.
The Bukom site, Shell's largest wholly owned plant, has a500,000 barrels per day (bpd) refinery and a steam cracker thatproduces more than 900,000 tonnes of ethylene per year.
Trade sources not related to Shell said a crude distillationunit (CDU) was due to undergo maintenance this week. They alsosaid Shell's cracker experienced a compressor trip on Tuesdayand this could have led to the unit being shut unexpectedly.
Shell declined to comment on individual units at the site.
Shell's Pulau Bukom refinery caught fire last August,resulting in a CDU being shut for a prolonged period and thecompany was issued with a stop work order..
Shell also declared force majeure on its chemicals supplieslast year following issues with its Pulau Bukom cracker, whichresumed operations last month.
(Additional reporting by Florence Tan and Roslan Khasawneh;editing by David Clarke)